Today's Message Index:
----------------------
1. 04:43 AM - GPS Antenna Placement ()
2. 07:35 AM - Re: PWM Signal to 0-5v Voltage Converter (Mark Steitle)
3. 08:06 AM - Re: Re: AutoCAD Attachment for Starter (jerb)
4. 08:10 AM - Re: Suggestions for software to create (Robert L. Nuckolls, III)
5. 08:20 AM - Re: Re: Suggestions for software to create (Robert L. Nuckolls, III)
6. 08:23 AM - Re: Bob at Oshkosh (Robert L. Nuckolls, III)
7. 08:54 AM - Re: PWM Signal to 0-5v Voltage Converter (Jerzy Krasinski)
8. 09:25 AM - Re: Suggestions for software to create simple wiring diagrams / (Chad Robinson)
9. 10:07 AM - Re: PWM Signal to 0-5v Voltage Converter (Mark Steitle)
10. 10:44 AM - Re: PWM Signal to 0-5v Voltage Converter (Jerzy Krasinski)
11. 02:29 PM - Re: AeroElectric-List Digest: 11 Msgs - 07/20/04 (Stuart S Driver)
12. 02:41 PM - Alternate static source (Fergus Kyle)
13. 04:33 PM - Re: Alternate static source ()
14. 05:55 PM - Re: PWM Signal to 0-5v Voltage Converter (Charlie England)
15. 09:20 PM - Re: Suggestions for software to create simple wiring (NEMuzzy)
Message 1
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| Subject: | GPS Antenna Placement |
--> AeroElectric-List message posted by: <bakerocb@cox.net>
<< AeroElectric-List message previously posted by: PeterHunt1@aol.com
Am I in any way compromising my GPS antenna reception (for a GNS 530)
if I place the antenna under my cowl about 10 inches from my SD-20
alternator? Is there an "electrical" issue having it that close or near my LASAR
ignition wires? I see by the archives that many of you place your GPS antenna
under your cowl. Do any of you have an argument for not doing so? Pete>>
7/22/2004
Hello Pete, The instructions that came with the antenna for my Garmin 430 called
for a grandiose metal ground plane under the antenna. I called a Garmin tech
person and he told me to just put an aluminum shelf under my antenna to shield
it from some of the electrical / electronic garbage coming from below.
My GPS antenna is below a fiberglass fuselage shell on a small aluminum shelf just
aft of the stainless steel and plywood firewall not too far from a 60 amp
alternator on the rear of my engine. Works great.
OC
Message 2
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| Subject: | PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
Trampas,
Well, no cigar for me. Tried hooking up the EI fuel probe signal lead to
the low frequency channel of the BMA and it didn't respond. As I
understand it, the EI outputs a 0-5v pulse-width modulation signal. It is
a square wave signal in the plus direction only which varies with changes
in capacitance. I don't know enough to go any further with this. So, I'll
inquire into purchasing a converter. There are a couple of sources,
neither of which is a low-buck solution, which is what I was hoping
for. But, at least there is a solution.
thanks,
Mark
At 12:46 PM 7/21/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: Mark Steitle
><msteitle@mail.utexas.edu>
>
>Trampas,
>That would be great news. The BMA does have both low frequency and high
>frequency channels. So, this would be low frequency? I guess I could try
>that and see if it works. That would be too easy. ;-)
>
>Mark
>
>At 11:28 AM 7/21/2004 -0400, you wrote:
> >--> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
> >
> >Mark,
> >
> >My understanding is that the EI probes output a 5V frequency signal which is
> >around 2Khz and the frequency varies with the fuel level. I think BMA can
> >accept a frequency input to their device, thus making the interfacing simple
> >as hooking it up.
> >
> >Regards,
> >Trampas Stern
> >
> >
> >-----Original Message-----
> >From: owner-aeroelectric-list-server@matronics.com
> >[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
> >Steitle
> >To: aeroelectric-list@matronics.com
> >Subject: AeroElectric-List: PWM Signal to 0-5v Voltage Converter
> >
> >--> AeroElectric-List message posted by: Mark Steitle
> ><msteitle@mail.utexas.edu>
> >
> >
> > >
> > >Does anyone know where I can get a converter that takes a 5v pwm signal
> > >and converts it to 0-5v output. The purpose is to convert the output
> > >signal from my Electronics Int'l. capacitive fuel probes to a signal that
> > >my BMA EFIS can understand. I figure there ought to be a simple circuit
> > >somewhere that will do this, but I haven't been able to find it. I feel
> > >confident that I could assemble such a device, but its beyond me to design
> > >such a circuit from scratch.
> > >
> > >Thanks,
> > >Mark S.
> >
> >
>
>
Message 3
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| Subject: | Re: AutoCAD Attachment for Starter |
Switches
--> AeroElectric-List message posted by: jerb <ulflyer@verizon.net> Switches
Kind of sounds like the pre 1969 Piper Cherokee mag switch and starter push
button set up. Start on left mag, right off and push the starter button to
engage the starter, once running turn on the right mag. Using the right
switches it could be wired so that the right mag switch must be in the off
position to be able to energize the starter. The disadvantage is you can
forget to turn the right mag on after start up - what the key switch tried
to prevent.
jerb
At 10:29 PM 7/20/04 -0500, you wrote:
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><rnuckolls@aeroelectric.com>
>
>At 04:48 PM 7/13/2004 -0700, you wrote:
>
> >Hi Bob,
> >
> >Sorry the posting on the Matronics list didn't work; the AutoCAD file is
> >attached to this message.
> >
> >The drawing shows a starter switch scheme I'm considering for my
> >project. The idea is
> >to have a separate 2-5 toggle switch (Off-On-(Start)) for each magneto. The
> >12 volt power for the starter contactor coil comes from the main bus
> into the
> >right mag switch and then to the left mag switch so that when both toggle
> >switches
> >are held in the top position, three things happen:
> >
> >1. The right, non-impulse, magneto is grounded.
> >
> >2. The left, impulse, magneto is not grounded.
> >
> >3. The starter contactor closes because the coil is energized and the
> starter
> >engages.
> >
> >This is a modification of Z-11. It seems to me to provide the benefit of
> >eliminating
> >the need for a pushbutton starter switch. It also seems to provide the
> >same benefit; namely, disabling the right mag during start.
> >
> >Any comments?
>
> I guess I don't see what's driving your "modification" . . . Z-11 doesn't
> show or need a separate push-button for starter. The mod you suggest
> has the same "disadvantage" as a key-type switch. A rejected start
> effort opens the start contacts of the right mag and immediately ungrounds
> the right mag making it "hot". IF the mag decides to fire a cylinder (rare
> but we think it happens) you get a BTDC ignition and kickback which has
> been
> known to break starter parts.
>
> This is why Figure Z-11 shows starter enabled and right mag grounded
> through
> a switch that is not moved until AFTER the engine is running. I'd recommend
> you stay with the published configuration.
>
> Bob . . .
>
>
>---
>
>
Message 4
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| Subject: | Re: Suggestions for software to create |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
At 08:20 PM 7/21/2004 -0500, you wrote:
>Bob:
>I've downloaded the CD and extracted the AutoCAD LT1.0 but if I "click" on
>the *.exe files, it tries to extract again. What do I do to start up
>AutoCad Lt1.0?
>Marty
In the LT1.0 directory there is a file called makeset.bat
You need 4 floppy disks. Doubleclick makeset.bat and follow
instructions to insert floppies one at a time. When all four
have been written, you will have a pristine install-set for
the cad program.
Put disk #1 in your a:drive and doubleclick setup.exe which
will being the install program to put the cad program on
your hard drive.
When finished, you can open the AutoCAD program and then
open the .dwg files with it. Check in some used book stores
for some AutoCAD LT tutorials.
Bob . . .
---
Message 5
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| Subject: | Re: Suggestions for software to create |
simple wiring diagrams
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
simple wiring diagrams
At 04:28 PM 7/21/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: "Greg Reid"
><AllTheGoodUseridsAreGone@hotmail.com>
>
>Thanks for all of the suggestions, folks. I should've mentioned that
>this is for a Windoze laptop. Bob, I did download and install the three
>free CAD tools from your site:
>
>
>- Acad Lt 1.0 installation apparently wants me to cut four floppy
>disks?! I don't have a floppy at all.
Ebay has dozens of USB floppy drives for $25 or less.
> <snip>
>
>
>Meanwhile, last night I did a little Google'ing and came across
>"SmartDraw", which seems to be well respected and supported, and used a
>30-day trial copy to create my left wing wiring diagram quite nicely.
>(I have no financial interest, etc. etc.) I'll keep playing with it to
>see if it's worth purchasing. And I'll spend some time with IntelliCad
>too.
Very good. I'll be interested in your findings.
Bob . . .
---
Message 6
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| Subject: | Re: Bob at Oshkosh |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
At 11:28 PM 7/21/2004 -0400, you wrote:
>--> AeroElectric-List message posted by: Don Boardman <dboardm3@twcny.rr.com>
>
> > Dee and I will make the pilgrimage to OSH after about 8 years
> > hiatus. I'm scheduled to offer a forum in the tents on Saturday
> > at 2:30 p.m. We'd be pleased to meet face to face with any of
> > you who can join us.
>
> > Bob . . .
>
>Hi Bob,
>
>I am the Chairman in charge of the fun stuff (activities) at the Oshkosh
>SeaBase. Saturday is a hectic day for me and I doubt if I can make your
>seminar. We have a "Pig Roast" at the Base on Saturday. I am not directly in
>charge of that event but have lots to do. I think it starts at 5PM. We are
>also being host to a Murphy Aircraft group during the Friday evening fish
>dinner. The dinner sold by the food vendor is open to all comers. If by
>chance you get to the SeaBase for either of these (or any other time) you
>could ask for me at the registration office and they will page me. If it is
>convenient and works into your plans, I'd love to touch base and put a face
>on the person who was so helpful with the wiring of my Murphy Moose
Thanks for the invitation. It's doubtful that I'm going to have much
evening time open. I've been invited to talk at several gaterings
and we're working to see if I can accommodate any of them and still
take care of essentials.
>Side note: Had the EAA'ers at the hanger tonight. I installed the Moose atop
>it's Aerocet Amphibs earlier in the day ... finally. Everyone was very
>interested with the electrical architecture. "Where are the breakers" etc.
>
>Thanks again for all your help,
You're most welcome. I'm pleased that you find the work useful.
Don't have any Northeast seminars scheduled. Any chance your
local EAA chapter would like to host one?
Bob . . .
---
Message 7
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| Subject: | Re: PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@provalue.net>
Mark,
For a conversion of pulse width modulation signal into DC signal you
do not need any high dollar converters. You need a signal averager which
most likely can be made out of a resistor and capacitor.
There are three questions here: 1) what is the frequency of PWM pulses
from the sensor and 2) what is the input resistance of the indicator, 3)
what is the output resistance of the sensor.
Large input resistance of the indicator is very likely in your system
and that would make your project easy, a simple RC circuit with a time
constant of a fraction of a second would work.
I doubt that ithe frequency of the PWM signal would be lower than 100Hz.
Assuming such a low frequency as the worst case, a 0.1 second time
constant integrator would be sufficient. Such time constant can be made
by 10 kiloohms with 10 microfarads, or 1 kiloohm with 100 microfarads.
etc.. The last pair would work better in case of really low input
resistance of the indicator. You can always use a bigger capacitor, that
would provide larger time constant and better averaging. If it happened
that you had a higher frequency from the sensor it would make
operation of the system better.
Connect together the grounds of the PWM sensor and the indicator.
Connect the PWM sensor output through the resistor to the input of the
indicator. Connect the capacitor acress the input of the indicator. The
network would convert the PWM pulsed signal into almost DC signal with
voltage proportional to the length of the pulses. That should convince
the system to work.
For the unlikely case of a very small input resistance of the indicator
together with a large output resistance of the sensor, you would have
to hook up an opamp wired as a follower in front of the indicator,
which would increase input resistance of the indicator.
Jerzy
Mark Steitle wrote:
>--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
>
>Trampas,
>Well, no cigar for me. Tried hooking up the EI fuel probe signal lead to
>the low frequency channel of the BMA and it didn't respond. As I
>understand it, the EI outputs a 0-5v pulse-width modulation signal. It is
>a square wave signal in the plus direction only which varies with changes
>in capacitance. I don't know enough to go any further with this. So, I'll
>inquire into purchasing a converter. There are a couple of sources,
>neither of which is a low-buck solution, which is what I was hoping
>for. But, at least there is a solution.
>
>thanks,
>Mark
>
> At 12:46 PM 7/21/2004 -0500, you wrote:
>
>
>>--> AeroElectric-List message posted by: Mark Steitle
>><msteitle@mail.utexas.edu>
>>
>>Trampas,
>>That would be great news. The BMA does have both low frequency and high
>>frequency channels. So, this would be low frequency? I guess I could try
>>that and see if it works. That would be too easy. ;-)
>>
>>Mark
>>
>>At 11:28 AM 7/21/2004 -0400, you wrote:
>>
>>
>>>--> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
>>>
>>>Mark,
>>>
>>>My understanding is that the EI probes output a 5V frequency signal which is
>>>around 2Khz and the frequency varies with the fuel level. I think BMA can
>>>accept a frequency input to their device, thus making the interfacing simple
>>>as hooking it up.
>>>
>>>Regards,
>>>Trampas Stern
>>>
>>>
>>>-----Original Message-----
>>>From: owner-aeroelectric-list-server@matronics.com
>>>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
>>>Steitle
>>>To: aeroelectric-list@matronics.com
>>>Subject: AeroElectric-List: PWM Signal to 0-5v Voltage Converter
>>>
>>>--> AeroElectric-List message posted by: Mark Steitle
>>><msteitle@mail.utexas.edu>
>>>
>>>
>>>
>>>
>>>>Does anyone know where I can get a converter that takes a 5v pwm signal
>>>>and converts it to 0-5v output. The purpose is to convert the output
>>>>signal from my Electronics Int'l. capacitive fuel probes to a signal that
>>>>my BMA EFIS can understand. I figure there ought to be a simple circuit
>>>>somewhere that will do this, but I haven't been able to find it. I feel
>>>>confident that I could assemble such a device, but its beyond me to design
>>>>such a circuit from scratch.
>>>>
>>>>Thanks,
>>>>Mark S.
>>>>
>>>>
>>>
>>>
>>
>>
>
>
>
>
Message 8
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| Subject: | Re: Suggestions for software to create simple wiring |
diagrams /
Linux
--> AeroElectric-List message posted by: Chad Robinson <crj@lucubration.com>
By the way, all of the CAD programs mentioned are Windows applications. I'm
not a Linux bigot but I do run it and it occurred to me that there might be
others that do as well. If you're one of them, check out a program called
"Qcad". There is a GPL version available for free and the application is quite
good. It can only open DXF files (not DWG), but there are free converters out
there to translate between the two. I use Qcad for all my light-duty CAD
requirements.
Regards,
Chad
Message 9
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| Subject: | Re: PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
Jerzy,
Thanks for the fine explanation. From reviewing the pics I took off the
scope, it looks like the pulse is 5.6v and varies between 200us and 390us,
depending on fuel level. I'm working on this with an EE friend that
suggested essentially the same solution as yours. Sounds like the way to
go. Thanks for the help.
Mark S.
At 10:53 AM 7/22/2004 -0500, you wrote:
>--> AeroElectric-List message posted by: Jerzy Krasinski
><krasinski@provalue.net>
>
>Mark,
>For a conversion of pulse width modulation signal into DC signal you
>do not need any high dollar converters. You need a signal averager which
>most likely can be made out of a resistor and capacitor.
>
>There are three questions here: 1) what is the frequency of PWM pulses
>from the sensor and 2) what is the input resistance of the indicator, 3)
>what is the output resistance of the sensor.
>
> Large input resistance of the indicator is very likely in your system
>and that would make your project easy, a simple RC circuit with a time
>constant of a fraction of a second would work.
>
> I doubt that ithe frequency of the PWM signal would be lower than 100Hz.
>Assuming such a low frequency as the worst case, a 0.1 second time
>constant integrator would be sufficient. Such time constant can be made
>by 10 kiloohms with 10 microfarads, or 1 kiloohm with 100 microfarads.
>etc.. The last pair would work better in case of really low input
>resistance of the indicator. You can always use a bigger capacitor, that
>would provide larger time constant and better averaging. If it happened
>that you had a higher frequency from the sensor it would make
>operation of the system better.
>
>Connect together the grounds of the PWM sensor and the indicator.
>Connect the PWM sensor output through the resistor to the input of the
>indicator. Connect the capacitor acress the input of the indicator. The
>network would convert the PWM pulsed signal into almost DC signal with
>voltage proportional to the length of the pulses. That should convince
>the system to work.
>
>For the unlikely case of a very small input resistance of the indicator
>together with a large output resistance of the sensor, you would have
>to hook up an opamp wired as a follower in front of the indicator,
>which would increase input resistance of the indicator.
>Jerzy
>
>Mark Steitle wrote:
>
> >--> AeroElectric-List message posted by: Mark Steitle
> <msteitle@mail.utexas.edu>
> >
> >Trampas,
> >Well, no cigar for me. Tried hooking up the EI fuel probe signal lead to
> >the low frequency channel of the BMA and it didn't respond. As I
> >understand it, the EI outputs a 0-5v pulse-width modulation signal. It is
> >a square wave signal in the plus direction only which varies with changes
> >in capacitance. I don't know enough to go any further with this. So, I'll
> >inquire into purchasing a converter. There are a couple of sources,
> >neither of which is a low-buck solution, which is what I was hoping
> >for. But, at least there is a solution.
> >
> >thanks,
> >Mark
> >
> > At 12:46 PM 7/21/2004 -0500, you wrote:
> >
> >
> >>--> AeroElectric-List message posted by: Mark Steitle
> >><msteitle@mail.utexas.edu>
> >>
> >>Trampas,
> >>That would be great news. The BMA does have both low frequency and high
> >>frequency channels. So, this would be low frequency? I guess I could try
> >>that and see if it works. That would be too easy. ;-)
> >>
> >>Mark
> >>
> >>At 11:28 AM 7/21/2004 -0400, you wrote:
> >>
> >>
> >>>--> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
> >>>
> >>>Mark,
> >>>
> >>>My understanding is that the EI probes output a 5V frequency signal
> which is
> >>>around 2Khz and the frequency varies with the fuel level. I think BMA can
> >>>accept a frequency input to their device, thus making the interfacing
> simple
> >>>as hooking it up.
> >>>
> >>>Regards,
> >>>Trampas Stern
> >>>
> >>>
> >>>-----Original Message-----
> >>>From: owner-aeroelectric-list-server@matronics.com
> >>>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
> >>>Steitle
> >>>To: aeroelectric-list@matronics.com
> >>>Subject: AeroElectric-List: PWM Signal to 0-5v Voltage Converter
> >>>
> >>>--> AeroElectric-List message posted by: Mark Steitle
> >>><msteitle@mail.utexas.edu>
> >>>
> >>>
> >>>
> >>>
> >>>>Does anyone know where I can get a converter that takes a 5v pwm signal
> >>>>and converts it to 0-5v output. The purpose is to convert the output
> >>>>signal from my Electronics Int'l. capacitive fuel probes to a signal that
> >>>>my BMA EFIS can understand. I figure there ought to be a simple circuit
> >>>>somewhere that will do this, but I haven't been able to find it. I feel
> >>>>confident that I could assemble such a device, but its beyond me to
> design
> >>>>such a circuit from scratch.
> >>>>
> >>>>Thanks,
> >>>>Mark S.
> >>>>
> >>>>
> >>>
> >>>
> >>
> >>
> >
> >
> >
> >
>
>
Message 10
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| Subject: | Re: PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@provalue.net>
Mark,
Of course, you might still have a problem of shifted zero and mismatch
of ranges. One opamp for a dollar or so woyuld solve this problem.
Jerzy
Jerzy Krasinski wrote:
>--> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@provalue.net>
>
>Mark,
>For a conversion of pulse width modulation signal into DC signal you
>do not need any high dollar converters. You need a signal averager which
>most likely can be made out of a resistor and capacitor.
>
>There are three questions here: 1) what is the frequency of PWM pulses
>from the sensor and 2) what is the input resistance of the indicator, 3)
>what is the output resistance of the sensor.
>
> Large input resistance of the indicator is very likely in your system
>and that would make your project easy, a simple RC circuit with a time
>constant of a fraction of a second would work.
>
> I doubt that ithe frequency of the PWM signal would be lower than 100Hz.
>Assuming such a low frequency as the worst case, a 0.1 second time
>constant integrator would be sufficient. Such time constant can be made
>by 10 kiloohms with 10 microfarads, or 1 kiloohm with 100 microfarads.
>etc.. The last pair would work better in case of really low input
>resistance of the indicator. You can always use a bigger capacitor, that
>would provide larger time constant and better averaging. If it happened
>that you had a higher frequency from the sensor it would make
>operation of the system better.
>
>Connect together the grounds of the PWM sensor and the indicator.
>Connect the PWM sensor output through the resistor to the input of the
>indicator. Connect the capacitor acress the input of the indicator. The
>network would convert the PWM pulsed signal into almost DC signal with
>voltage proportional to the length of the pulses. That should convince
>the system to work.
>
>For the unlikely case of a very small input resistance of the indicator
>together with a large output resistance of the sensor, you would have
>to hook up an opamp wired as a follower in front of the indicator,
>which would increase input resistance of the indicator.
>Jerzy
>
>Mark Steitle wrote:
>
>
>
>>--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
>>
>>Trampas,
>>Well, no cigar for me. Tried hooking up the EI fuel probe signal lead to
>>the low frequency channel of the BMA and it didn't respond. As I
>>understand it, the EI outputs a 0-5v pulse-width modulation signal. It is
>>a square wave signal in the plus direction only which varies with changes
>>in capacitance. I don't know enough to go any further with this. So, I'll
>>inquire into purchasing a converter. There are a couple of sources,
>>neither of which is a low-buck solution, which is what I was hoping
>>for. But, at least there is a solution.
>>
>>thanks,
>>Mark
>>
>> At 12:46 PM 7/21/2004 -0500, you wrote:
>>
>>
>>
>>
>>>--> AeroElectric-List message posted by: Mark Steitle
>>><msteitle@mail.utexas.edu>
>>>
>>>Trampas,
>>>That would be great news. The BMA does have both low frequency and high
>>>frequency channels. So, this would be low frequency? I guess I could try
>>>that and see if it works. That would be too easy. ;-)
>>>
>>>Mark
>>>
>>>At 11:28 AM 7/21/2004 -0400, you wrote:
>>>
>>>
>>>
>>>
>>>>--> AeroElectric-List message posted by: "Trampas" <tstern@nc.rr.com>
>>>>
>>>>Mark,
>>>>
>>>>My understanding is that the EI probes output a 5V frequency signal which is
>>>>around 2Khz and the frequency varies with the fuel level. I think BMA can
>>>>accept a frequency input to their device, thus making the interfacing simple
>>>>as hooking it up.
>>>>
>>>>Regards,
>>>>Trampas Stern
>>>>
>>>>
>>>>-----Original Message-----
>>>>From: owner-aeroelectric-list-server@matronics.com
>>>>[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Mark
>>>>Steitle
>>>>To: aeroelectric-list@matronics.com
>>>>Subject: AeroElectric-List: PWM Signal to 0-5v Voltage Converter
>>>>
>>>>--> AeroElectric-List message posted by: Mark Steitle
>>>><msteitle@mail.utexas.edu>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>Does anyone know where I can get a converter that takes a 5v pwm signal
>>>>>and converts it to 0-5v output. The purpose is to convert the output
>>>>>signal from my Electronics Int'l. capacitive fuel probes to a signal that
>>>>>my BMA EFIS can understand. I figure there ought to be a simple circuit
>>>>>somewhere that will do this, but I haven't been able to find it. I feel
>>>>>confident that I could assemble such a device, but its beyond me to design
>>>>>such a circuit from scratch.
>>>>>
>>>>>Thanks,
>>>>>Mark S.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
Message 11
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|
| Subject: | Re: AeroElectric-List Digest: 11 Msgs - 07/20/04 |
--> AeroElectric-List message posted by: Stuart S Driver <stuart_38@juno.com>
If anyone has a copy of Bob's CD I'd be happy to pay the postage. I don't
have the high speed connection to download it TIA SSD
On Tue, 20 Jul 2004 23:55:22 -0700 AeroElectric-List Digest Server
<aeroelectric-list-digest@matronics.com> writes:
> *
>
> ==================================================
> Online Versions of Today's List Digest Archive
> ==================================================
>
> Today's complete AeroElectric-List Digest can be also be found in
> either
> of the two Web Links listed below. The .html file includes the
> Digest
> formatted in HTML for viewing with a web browser and features
> Hyperlinked
> Indexes and Message Navigation. The .txt file includes the plain
> ASCII
> version of the AeroElectric-List Digest and can be viewed with a
> generic
> text editor such as Notepad or with a web browser.
>
> HTML Version:
>
>
>
http://www.matronics.com/digest/aeroelectric-list/Digest.AeroElectric-Lis
t.2004-07-20.html
>
> Text Version:
>
>
>
http://www.matronics.com/digest/aeroelectric-list/Digest.AeroElectric-Lis
t.2004-07-20.txt
>
>
> ================================================
> EMail Version of Today's List Digest Archive
> ================================================
>
>
>
> AeroElectric-List Digest Archive
> ---
> Total Messages Posted Tue 07/20/04: 11
>
>
>
> Today's Message Index:
> ----------------------
>
> 1. 10:26 AM - Re: Splitter (Mauri Morin)
> 2. 10:41 AM - Suggestions for software to create simple wiring
> diagrams (Greg Reid)
> 3. 11:34 AM - Re: Suggestions for software to create simple
> (Chad Robinson)
> 4. 12:04 PM - Re: Suggestions for software to create simple
> (Gerry Holland)
> 5. 12:59 PM - Re: Suggestions for software to create (Robert
> L. Nuckolls, III)
> 6. 01:01 PM - Re: Suggestions for software to create (Robert
> L. Nuckolls, III)
> 7. 05:01 PM - Re: Splitter (Malcolm Thomson)
> 8. 08:06 PM - Re: Splitter (Bobby Hester)
> 9. 08:37 PM - Re: AutoCAD Attachment for Starter Switches
> (Robert L. Nuckolls, III)
> 10. 08:44 PM - Re: Splitter (Robert L. Nuckolls, III)
> 11. 10:13 PM - Re: Splitter (Werner Schneider)
>
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 10:26:31 AM PST US
> From: "Mauri Morin" <maurv8@bigsky.net>
> Subject: Re: AeroElectric-List: Splitter
>
> --> AeroElectric-List message posted by: "Mauri Morin"
> <maurv8@bigsky.net>
>
> Mickey,
>
> Take alook at this and see if it will do your job.
>
>
http://www.rv-8.com/IdeasProducts.htm#PRODUCT:%20%20King%20Antenna%20Adap
ter
>
> Mauri Morin\
> RV-8 wings/tanks
> Polson, Mt
>
> ----- Original Message -----
> From: "Mickey Billings" <mbilli@cox.net>
> Subject: AeroElectric-List: Splitter
>
>
> > --> AeroElectric-List message posted by: "Mickey Billings"
> <mbilli@cox.net>
> >
> > Does anyone know of a drawing to build a antenna switcher so I can
> plug my
> > ICOM handheld into the aircraft antenna if needed? The aircraft
> is a RV7
> > (antenna not yet mounted) the radio is a King KX125. Also, any
> information
> > regarding signal loss due to this device would be appreciated.
> >
> > Thanks
> > Mickey Billings
> >
> >
>
>
>
>
>
>
> ________________________________ Message 2
> _____________________________________
>
>
> Time: 10:41:01 AM PST US
> From: "Greg Reid" <AllTheGoodUseridsAreGone@hotmail.com>
> Subject: AeroElectric-List: Suggestions for software to create
> simple wiring diagrams
>
> --> AeroElectric-List message posted by: "Greg Reid"
> <AllTheGoodUseridsAreGone@hotmail.com>
>
> Hey folks
>
> I've been keeping my wiring diagrams on paper, with the intent of
> "one
> day" getting them properly recorded for my construction and
> maintenance
> logs. That day is fast approaching, as I've completed my fuselage
> and
> wing wiring (nothing much FWF or panel as yet.)
>
> I know that there are several-hundred-dollar CAD programs that will
> certainly do the trick, with plenty of overkill. But what's a cheap
> and
> easy program to use for simple hookup diagrams?
>
> Thanks for any and all suggestions,
> Greg Reid ( http://www.divorcemagazine.com/Vision132 )
>
>
>
>
>
>
> ________________________________ Message 3
> _____________________________________
>
>
> Time: 11:34:27 AM PST US
> From: Chad Robinson <crj@lucubration.com>
> Subject: Re: AeroElectric-List: Suggestions for software to create
> simple
> wiring diagrams
>
> --> AeroElectric-List message posted by: Chad Robinson
> <crj@lucubration.com>
>
> Greg Reid wrote:
> > --> AeroElectric-List message posted by: "Greg Reid"
> <AllTheGoodUseridsAreGone@hotmail.com>
> >
> > Hey folks
> >
> > I've been keeping my wiring diagrams on paper, with the intent of
> "one
> > day" getting them properly recorded for my construction and
> maintenance
> > logs. That day is fast approaching, as I've completed my fuselage
> and
> > wing wiring (nothing much FWF or panel as yet.)
> >
> > I know that there are several-hundred-dollar CAD programs that
> will
> > certainly do the trick, with plenty of overkill. But what's a
> cheap and
> > easy program to use for simple hookup diagrams?
>
> Greg, there are inexpensive CAD packages available online, and Bob
> includes a
> few demos (I believe) on his CD if you buy the Aeroelectric book. As
> another
> option, if you have or can get a copy of Visio, I made a stencil set
> from
> Bob's symbols that you can use there. I like Visio because it's easy
> to learn,
>
> and lines stay connected when you drag symbols around (among other
> things).
>
> http://www.lucubration.com/aero
>
> Regards,
> Chad
>
>
>
>
>
>
> ________________________________ Message 4
> _____________________________________
>
>
> Time: 12:04:56 PM PST US
> wiring diagrams
> Subject: Re: AeroElectric-List: Suggestions for software to create
> simple
> wiring diagrams
> From: Gerry Holland <gnholland@onetel.com>
>
> --> AeroElectric-List message posted by: Gerry Holland
> <gnholland@onetel.com>
>
> Greg Hi!
> >>
> >> I know that there are several-hundred-dollar CAD programs that
> will
> >> certainly do the trick, with plenty of overkill. But what's a
> cheap and
> >> easy program to use for simple hookup diagrams?
>
> If you are an Apple user especially OSX it might be worth looking
> at
> OmniGraffle Professional from http://www.omnigroup.com. About
> $89.00
> You can try it as a Demo first
>
> Regards
>
> Gerry
>
> a 384 G-FIZY
> Trigear with Rotax and Arplast CS Prop.
> Engine and Prop getting near to starting.
> Painting completed. Just vinyl design scheme to be added.
> Completing Wiring to Panel.
> Includes Dynon EFIS, KMD 150, Icom A-200 and SL70 Transponder.
> PSS AoA Fitted.
>
> http://www.g-fizy.com
> +44 7808 402404
> gnholland@onetel.com
>
>
>
>
>
>
> ________________________________ Message 5
> _____________________________________
>
>
> Time: 12:59:50 PM PST US
> From: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
> simple wiring diagrams
> Subject: Re: AeroElectric-List: Suggestions for software to create
> simple wiring diagrams
>
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <rnuckolls@aeroelectric.com>
> simple wiring diagrams
>
> At 01:42 PM 7/20/2004 -0400, you wrote:
>
> >--> AeroElectric-List message posted by: "Greg Reid"
> ><AllTheGoodUseridsAreGone@hotmail.com>
> >
> >Hey folks
> >
> >I've been keeping my wiring diagrams on paper, with the intent of
> "one
> >day" getting them properly recorded for my construction and
> maintenance
> >logs. That day is fast approaching, as I've completed my fuselage
> and
> >wing wiring (nothing much FWF or panel as yet.)
> >
> >I know that there are several-hundred-dollar CAD programs that
> will
> >certainly do the trick, with plenty of overkill. But what's a
> cheap and
> >easy program to use for simple hookup diagrams?
> >
> >Thanks for any and all suggestions,
> > Greg Reid ( http://www.divorcemagazine.com/Vision132 )
>
> How about free? You can download my CD offering at no
> cost from http://www.aeroelectric.com/CD/
>
> There are three cad programs on the CD that will open,
> edit, print and save any of the AutoCAD drawings also
> included on the CD. There are a couple of
> wirebooks-in-progress
> on the CD. I suspect that 90% or more of your wirebook is
> already done. Just download the package and drop by a
> bookstore
> for a used tutorial on one of the cad programs (the AutoCAD
> LT1.0
> is my recommendation).
>
> Bob . . .
>
>
> ---
>
>
>
>
>
>
> ________________________________ Message 6
> _____________________________________
>
>
> Time: 01:01:03 PM PST US
> From: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
> simple wiring diagrams
> Subject: Re: AeroElectric-List: Suggestions for software to create
> simple wiring diagrams
>
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <rnuckolls@aeroelectric.com>
> simple wiring diagrams
>
> At 02:31 PM 7/20/2004 -0400, you wrote:
>
> >--> AeroElectric-List message posted by: Chad Robinson
> <crj@lucubration.com>
> >
> >Greg Reid wrote:
> > > --> AeroElectric-List message posted by: "Greg Reid"
> > <AllTheGoodUseridsAreGone@hotmail.com>
> > >
> > > Hey folks
> > >
> > > I've been keeping my wiring diagrams on paper, with the intent
> of "one
> > > day" getting them properly recorded for my construction and
> maintenance
> > > logs. That day is fast approaching, as I've completed my
> fuselage and
> > > wing wiring (nothing much FWF or panel as yet.)
> > >
> > > I know that there are several-hundred-dollar CAD programs that
> will
> > > certainly do the trick, with plenty of overkill. But what's a
> cheap and
> > > easy program to use for simple hookup diagrams?
> >
> >Greg, there are inexpensive CAD packages available online, and Bob
> includes a
> >few demos (I believe) on his CD if you buy the Aeroelectric book. .
> .
>
>
> One doesn't need to buy anything to take advantage of the CD
> data package. It's free at:
>
> http://www.aeroelectric.com/CD/
>
> If someone doesn't have access to a high-speed Internet
> connection,
> we'll send a copy out for $10 but that's a nuisance fee . . .
> has
> nothing to do with buying anything else from us.
>
> Similarly, if anyone has copies of the CD via download,
> purchased,
> or handed out at one of our seminars, feel free to duplicate
> and
> distribute the CD to your local builder's community.
>
> Bob . . .
>
>
> ---
>
>
>
>
>
>
> ________________________________ Message 7
> _____________________________________
>
>
> Time: 05:01:52 PM PST US
> From: "Malcolm Thomson" <mdthomson@attglobal.net>
> Subject: RE: AeroElectric-List: Splitter
>
> --> AeroElectric-List message posted by: "Malcolm Thomson"
> <mdthomson@attglobal.net>
>
> King makes an adapter for this purpose. KX-99A costs about $55.
> Icom also has one IC-ANT-SB about the same price.
>
>
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
> Mauri
> Morin
> Subject: Re: AeroElectric-List: Splitter
>
>
> --> AeroElectric-List message posted by: "Mauri Morin"
> --> <maurv8@bigsky.net>
>
> Mickey,
>
> Take alook at this and see if it will do your job.
>
>
http://www.rv-8.com/IdeasProducts.htm#PRODUCT:%20%20King%20Antenna%20Ada
> pter
>
> Mauri Morin\
> RV-8 wings/tanks
> Polson, Mt
>
> ----- Original Message -----
> From: "Mickey Billings" <mbilli@cox.net>
> Subject: AeroElectric-List: Splitter
>
>
> > --> AeroElectric-List message posted by: "Mickey Billings"
> <mbilli@cox.net>
> >
> > Does anyone know of a drawing to build a antenna switcher so I can
>
> > plug my ICOM handheld into the aircraft antenna if needed? The
> > aircraft is a RV7 (antenna not yet mounted) the radio is a King
> KX125.
>
> > Also, any
> information
> > regarding signal loss due to this device would be appreciated.
> >
> > Thanks
> > Mickey Billings
> >
> >
>
>
> ==
> direct advertising on the Matronics Forums.
> ==
> ==
> ==
>
>
>
>
>
>
> ________________________________ Message 8
> _____________________________________
>
>
> Time: 08:06:57 PM PST US
> From: Bobby Hester <bhester@hopkinsville.net>
> Subject: Re: AeroElectric-List: Splitter
>
> --> AeroElectric-List message posted by: Bobby Hester
> <bhester@hopkinsville.net>
>
> Malcolm Thomson wrote:
>
> >--> AeroElectric-List message posted by: "Malcolm Thomson"
> <mdthomson@attglobal.net>
> >
> >King makes an adapter for this purpose. KX-99A costs about $55.
> >Icom also has one IC-ANT-SB about the same price.
> >
> >
> >
> These devises brake the connection to the main radio while the hand
> held
> is connected. If you want to be able to use both do you need two
> antennas? Can a hand held be wired thru your audio panel as a second
> radio?
>
> --
> Surfing the Web from Hopkinsville, KY
> Visit my web site at:
> http://www.geocities.com/hester-hoptown/RVSite/
> RV7A Slowbuild wings-QB Fuse :-)
>
>
>
>
>
>
> ________________________________ Message 9
> _____________________________________
>
>
> Time: 08:37:45 PM PST US
> From: "Robert L. Nuckolls, III" <rnuckolls@aeroelectric.com>
> Subject: AeroElectric-List: Re: AutoCAD Attachment for Starter
> Switches
>
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <rnuckolls@aeroelectric.com>
>
> At 04:48 PM 7/13/2004 -0700, you wrote:
>
> >Hi Bob,
> >
> >Sorry the posting on the Matronics list didn't work; the AutoCAD
> file is
> >attached to this message.
> >
> >The drawing shows a starter switch scheme I'm considering for my
> >project. The idea is
> >to have a separate 2-5 toggle switch (Off-On-(Start)) for each
> magneto. The
> >12 volt power for the starter contactor coil comes from the main
> bus into the
> >right mag switch and then to the left mag switch so that when both
> toggle
> >switches
> >are held in the top position, three things happen:
> >
> >1. The right, non-impulse, magneto is grounded.
> >
> >2. The left, impulse, magneto is not grounded.
> >
> >3. The starter contactor closes because the coil is energized and
> the starter
> >engages.
> >
> >This is a modification of Z-11. It seems to me to provide the
> benefit of
> >eliminating
> >the need for a pushbutton starter switch. It also seems to provide
> the
> >same benefit; namely, disabling the right mag during start.
> >
> >Any comments?
>
> I guess I don't see what's driving your "modification" . . . Z-11
> doesn't
> show or need a separate push-button for starter. The mod you
> suggest
> has the same "disadvantage" as a key-type switch. A rejected
> start
> effort opens the start contacts of the right mag and immediately
> ungrounds
> the right mag making it "hot". IF the mag decides to fire a
> cylinder (rare
> but we think it happens) you get a BTDC ignition and kickback
> which has been
> known to break starter parts.
>
> This is why Figure Z-11 shows starter enabled and right mag
> grounded through
> a switch that is not moved until AFTER the engine is running. I'd
> recommend
> you stay with the published configuration.
>
> Bob . . .
>
>
> ---
>
>
>
>
>
>
> ________________________________ Message 10
> ____________________________________
>
>
> Time: 08:44:29 PM PST US
> From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
> Subject: Re: AeroElectric-List: Splitter
>
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> <bob.nuckolls@cox.net>
>
> At 10:11 PM 7/20/2004 -0500, you wrote:
> >--> AeroElectric-List message posted by: Bobby Hester
> ><bhester@hopkinsville.net>
> >
> >Malcolm Thomson wrote:
> >
> > >--> AeroElectric-List message posted by: "Malcolm Thomson"
> > <mdthomson@attglobal.net>
> > >
> > >King makes an adapter for this purpose. KX-99A costs about $55.
> > >Icom also has one IC-ANT-SB about the same price.
> > >
> > >
> > >
> >These devises brake the connection to the main radio while the hand
> held
> >is connected. If you want to be able to use both do you need two
> >antennas? Can a hand held be wired thru your audio panel as a second
> radio?
>
> There are no practical duplexers to allow simultaneous
> use of a single antenna by two transceivers in airplanes.
> The practical approach is to install two antennas or provide
> a means for switching the single antenna between radios.
>
> Bob . . .
>
> -----------------------------------------
> ( Experience and common sense cannot be )
> ( replaced with policy and procedures. )
> ( R. L. Nuckolls III )
> -----------------------------------------
>
>
>
>
>
>
> ________________________________ Message 11
> ____________________________________
>
>
> Time: 10:13:33 PM PST US
> From: "Werner Schneider" <wernerschneider@compuserve.com>
> Subject: Re: AeroElectric-List: Splitter
>
> --> AeroElectric-List message posted by: "Werner Schneider"
> <wernerschneider@compuserve.com>
>
> Hello Bobby,
>
> I have a KX-125 and a Icom A-20 each with his own antenna wired to a
> GMA 340
> audio pannel, however as the Icom is a bit an old radio I did need
> an
> interface box which was designed by joe Fisher from flighttech, I'm
> happy
> using the Icom as a second radio! The newer Icom's however should be
> able to
> be connected directly.
>
> I do have some pictures of this box if needed.
>
> Werner
>
> ----- Original Message -----
> From: "Bobby Hester" <bhester@hopkinsville.net>
> Subject: Re: AeroElectric-List: Splitter
>
>
> > --> AeroElectric-List message posted by: Bobby Hester
> <bhester@hopkinsville.net>
> >
> > Malcolm Thomson wrote:
> >
> > >--> AeroElectric-List message posted by: "Malcolm Thomson"
> <mdthomson@attglobal.net>
> > >
> > >King makes an adapter for this purpose. KX-99A costs about $55.
> > >Icom also has one IC-ANT-SB about the same price.
> > >
> > >
> > >
> > These devises brake the connection to the main radio while the
> hand held
> > is connected. If you want to be able to use both do you need two
> > antennas? Can a hand held be wired thru your audio panel as a
> second
> radio?
> >
> > --
> > Surfing the Web from Hopkinsville, KY
> > Visit my web site at:
> http://www.geocities.com/hester-hoptown/RVSite/
> > RV7A Slowbuild wings-QB Fuse :-)
> >
> >
>
>
>
>
>
>
>
>
>
>
>
>
>
=
>
=
>
=
> http://www.matronics.com/FAQ/AeroElectric-List.htm
>
=
>
>
>
>
>
>
>
>
Message 12
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|
| Subject: | Alternate static source |
--> AeroElectric-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
Cheers,
I've been mulling ovwer the late email exchange regarding the above
topic.
It occurs to me that using the cockpit air pressure for static
source dates back to WWII or ealier as an alternate source when the static
system iced up or otherwise - not an infrequent event. The answer was to
crack the dial glass to get a reasonable facsimile of static pressure BUT
you then had to stall the aircraft to establish the new datum before landing
so as not to depend on a revised indication.
The same would apply here so if you get a reasonable reading DON'T
crack a side window open or change the airflow to the cabin - airspeed is
pitot over static so don't fool with Mother Nature on the bottom of the
formula.
I am hesitant to use the cockpit because I am intent on pressurising
it slightly to avoid exhaust intake through the slits etc. Also if hot plus
cold air mix is twice greater than outlet total you have better temp control
and smoke dispersement if something in the cockpit lets it out.
....just a thought - open to flames............
Ferg A064
Message 13
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|
| Subject: | Alternate static source |
--> AeroElectric-List message posted by: <beecho@beecho.org>
Ferg
"Great Minds,...." Your thoughts of slightly pressurizing the cockpit
is exactly what I have been planning. (or doing) I have a naca duct in
the cowl as far forward as practical to get prop blast providing fresh
air under some pressure. The air flow can be controlled and heated to
get the right combo, but I plan to keep it at least partially open
always to provide the positive pressure. (Even though many in the past
have said that the cockpit seems to be naturally under positive
pressure.)
Tom (Getting closer to the blue.) (And begging for a ride to OSH, to
the point of buying the fuel.....)
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Fergus Kyle
Subject: AeroElectric-List: Alternate static source
--> AeroElectric-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
Cheers,
I've been mulling ovwer the late email exchange regarding the
above
topic.
It occurs to me that using the cockpit air pressure for static
source dates back to WWII or ealier as an alternate source when the
static
system iced up or otherwise - not an infrequent event. The answer was to
crack the dial glass to get a reasonable facsimile of static pressure
BUT
you then had to stall the aircraft to establish the new datum before
landing
so as not to depend on a revised indication.
The same would apply here so if you get a reasonable reading
DON'T
crack a side window open or change the airflow to the cabin - airspeed
is
pitot over static so don't fool with Mother Nature on the bottom of the
formula.
I am hesitant to use the cockpit because I am intent on
pressurising
it slightly to avoid exhaust intake through the slits etc. Also if hot
plus
cold air mix is twice greater than outlet total you have better temp
control
and smoke dispersement if something in the cockpit lets it out.
....just a thought - open to flames............
Ferg A064
==
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==
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Message 14
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| Subject: | Re: PWM Signal to 0-5v Voltage Converter |
--> AeroElectric-List message posted by: Charlie England <ceengland@bellsouth.net>
snipped
>>>>
>>>>
>>>>
>>>>>Does anyone know where I can get a converter that takes a 5v pwm signal
>>>>>and converts it to 0-5v output. The purpose is to convert the output
>>>>>signal from my Electronics Int'l. capacitive fuel probes to a signal that
>>>>>my BMA EFIS can understand. I figure there ought to be a simple circuit
>>>>>somewhere that will do this, but I haven't been able to find it. I feel
>>>>>confident that I could assemble such a device, but its beyond me to design
>>>>>such a circuit from scratch.
>>>>>
>>>>>Thanks,
>>>>>Mark S.
>>>>>
Kitplanes Sept. '89, or download it at
http://www.rst-engr.com/rst/articles/KP89SEP.pdf
Charlie
Message 15
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| Subject: | Re: Suggestions for software to create simple wiring |
--> AeroElectric-List message posted by: "NEMuzzy" <list01@GourmetDamage.com>
Powerpoint works reasonable well also. Create your basic symbols, group
them so they act like one entity, put them on the first page, then copy and
paste.
Make a different slide for each circuit. It is much easier to keep it neat
and organized that way. I like the big massive drawings, with every circuit
on one page. But they are a nightmare to create and to maintain.
I also used Excel to keep track of the fuse blocks. Sized everything such
that I could print the excel file and use it as the label on the fuseblocks.
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