Today's Message Index:
----------------------
1. 03:17 AM - EFIS Backup Battery and fuseblocks - Attn Bob (Mike & Lee Anne Wiebe)
2. 06:20 AM - Re: EFIS Backup Battery and fuseblocks - (Charlie Kuss)
3. 06:40 AM - Re: EFIS Backup Battery and fuseblocks - (Robert L. Nuckolls, III)
4. 07:05 AM - Re: Master alarm circuit (Jim Stone)
5. 07:37 AM - Re: Rotax Alternator (Jim Butcher)
6. 09:15 AM - Re: Master alarm circuit (D Wysong)
7. 09:43 AM - Re: Master alarm circuit (Marcos Della)
8. 10:42 AM - Re: Question about dimmer circuits and annunicators... (Marcos Della)
9. 10:59 AM - Re: Master alarm circuit (James Redmon)
10. 11:13 AM - Flap Motor Warning (Sigmo@aol.com)
11. 11:13 AM - Re: Master alarm circuit (rv-9a-online)
12. 11:18 AM - Re: EFIS Backup Battery and fuseblocks - Attn Bob (John Schroeder)
13. 11:25 AM - Re: WD-40 as Contact Cleaner (Dww0708@aol.com)
14. 11:44 AM - Re: Master alarm circuit (rv-9a-online)
15. 03:12 PM - Re: Master alarm circuit (James Redmon)
16. 03:53 PM - Master alarm circuit (Roy Wheaton)
17. 03:54 PM - Re: Master alarm circuit (rv-9a-online)
18. 06:14 PM - Re: APU vs battery (Speedy11@aol.com)
19. 06:36 PM - OBAM Configuration ()
20. 07:06 PM - Re: Re: APU vs battery (Wayne Sweet)
21. 10:03 PM - Re: Re: APU vs battery (B Tomm)
Message 1
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| Subject: | EFIS Backup Battery and fuseblocks - Attn Bob |
--> AeroElectric-List message posted by: "Mike & Lee Anne Wiebe" <mwiebe@sympatico.ca>
Bob - we haven't talked in about four years. Your designs are flying
well in our Falco. Thanks for the advice back then, and here's a
question for the new project.
I very much like the low voltage warning system and the setup in your
recently reference schematic
http://aeroelectric.com/articles/lvwarn/9021-620.pdf . This setup is
exactly to my needs. However, one thing is getting complicated and I
wonder if you have any thoughts.
I really like the fuseblock idea instead of acres of breakers. But this
design requires four buses, so we're starting to get "acres of buses".
When you divvy up the load this way, there are not many circuits on each
bus. What would be ideal is one common mechanical bus, with the ability
to segregate it electrically. Obviously nobody is likely to have it set
up the way I want, but perhaps yours (or other products?) can be "cut"
and fed from both ends, so that each mechanical block is good for two
electrical buses? Thoughts?
Mike
Message 2
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| Subject: | Re: EFIS Backup Battery and fuseblocks - |
Attn Bob
--> AeroElectric-List message posted by: Charlie Kuss <chaztuna@adelphia.net> Attn
Bob
At 06:16 AM 3/4/2005, you wrote:
>--> AeroElectric-List message posted by: "Mike & Lee Anne Wiebe"
><mwiebe@sympatico.ca>
>
>Bob - we haven't talked in about four years. Your designs are flying
>well in our Falco. Thanks for the advice back then, and here's a
>question for the new project.
>
>I very much like the low voltage warning system and the setup in your
>recently reference schematic
>http://aeroelectric.com/articles/lvwarn/9021-620.pdf . This setup is
>exactly to my needs. However, one thing is getting complicated and I
>wonder if you have any thoughts.
>
>I really like the fuseblock idea instead of acres of breakers. But this
>design requires four buses, so we're starting to get "acres of buses".
>When you divvy up the load this way, there are not many circuits on each
>bus. What would be ideal is one common mechanical bus, with the ability
>to segregate it electrically. Obviously nobody is likely to have it set
>up the way I want, but perhaps yours (or other products?) can be "cut"
>and fed from both ends, so that each mechanical block is good for two
>electrical buses? Thoughts?
>
>Mike
Mike,
Bussman makes a newer style of fuse block which allows 2 power sources.
They differ from the standard style Bob prefers, in that the power output
wires exit from the rear of the fuse block. See
http://order.waytekwire.com/IMAGES/M37/catalog/217_063
http://www.mihdirect.biz/
I purchased mine from MIH.
Charlie Kuss
Message 3
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| Subject: | Re: EFIS Backup Battery and fuseblocks - |
Attn Bob
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
Attn Bob
At 06:16 AM 3/4/2005 -0500, you wrote:
>--> AeroElectric-List message posted by: "Mike & Lee Anne Wiebe"
><mwiebe@sympatico.ca>
>
>Bob - we haven't talked in about four years. Your designs are flying
>well in our Falco. Thanks for the advice back then, and here's a
>question for the new project.
>
>I very much like the low voltage warning system and the setup in your
>recently reference schematic
>http://aeroelectric.com/articles/lvwarn/9021-620.pdf . This setup is
>exactly to my needs. However, one thing is getting complicated and I
>wonder if you have any thoughts.
>
>I really like the fuseblock idea instead of acres of breakers. But this
>design requires four buses, so we're starting to get "acres of buses".
>When you divvy up the load this way, there are not many circuits on each
>bus. What would be ideal is one common mechanical bus, with the ability
>to segregate it electrically. Obviously nobody is likely to have it set
>up the way I want, but perhaps yours (or other products?) can be "cut"
>and fed from both ends, so that each mechanical block is good for two
>electrical buses? Thoughts?
I'm a bit lost. The fuse blocks are available in sizes from 6 to 20
slots. A group of say 4, 6-slot fuseblocks is only slightly larger
than a pair 12 slot devices. Modifying these devices as you suggest
is difficult and fraught with risk. At one time, I tried to split
a 20-slot fuseblock into two segments and install an e-bus normal
feed diode inside the fuseblock. Time consuming and marginally
successful.
If you're cramped for space such that the narrow range of selection
from B&C (6, 10, 20-slot) don't permit an optimized bussing
arrangement, then I'll suggest you seek suppliers of the intermediate
sizes on the 'net. When I first offered those devices from our
website catalog, they were difficult to find "in the wild" . . .
that was 8 years ago and they're offered by many suppliers
in all sizes.
Bob . . .
Message 4
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| Subject: | Re: Master alarm circuit |
--> AeroElectric-List message posted by: "Jim Stone" <jrstone@insightbb.com>
That's what I am looking for D.
Jim
When can you start on it?
----- Original Message -----
From: "D Wysong" <hdwysong@gmail.com>
Subject: Re: AeroElectric-List: Master alarm circuit
> --> AeroElectric-List message posted by: D Wysong <hdwysong@gmail.com>
>
> > my usual work mode assumes that the "computer" is physically built
> > before it gets to me...
>
> Understood, although some days I'd still prefer an old HeathKit. :-) I
> hope I didn't insult you with the cartoons.
>
> Theory aside, perhaps you'd be willing to specify a few things for a
> potential developer?
> -- how many 'contact closures' do you want to monitor?
> -- how many of those need to be compared (canopy latch vs. throttle fwd,
> gear up vs. throttle aft, etc.)?
> -- single 'master alarm' for everything? Perhaps a master (that grabs
> your attention) with a separate caution/advisory panel that IDs the
> specific trigger??
>
> D
>
> ---------------
> do not archive
>
>
>
>
>
>
Message 5
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| Subject: | Re: Rotax Alternator |
--> AeroElectric-List message posted by: "Jim Butcher" <europa@triton.net>
Bob,
I notice that Z-16 has the control on the "C" wire. My Rotax install manual
states "never sever connection between terminal "C" and "+B+ of regulator
e.g. by removal of a fuse". Likewise the Rotax supplied wiring diagram shows
"R", "+B" and "C" all tied together. This makes me think the senerio
described by others where the OV module makes "C" go to zero and drives the
alt to full on is probably correct. Perhaps Z-16 needs edited.
I have wired my install per Z13 where the 2 blue wires correspond to the 2
yellow wires off the Rotax; my tied together "R", "+B" and "C" correspond to
Z13 Red and case ground corresponds to Z13 Blk. Do you see any problem with
this? With this configuration with the Aux Alt switch off, the Rotax
regulator does not have a battery to sense bus voltage. Will this be a
problem? Or will the capacitor take a charge and represent the 14 V battery?
Is a 15 WV capacitor ok here or will there likely be transients that require
a higher voltage capacitor?
Thanks
Jim Butcher
Europa A185 N241BW
Message 6
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| Subject: | Re: Master alarm circuit |
--> AeroElectric-List message posted by: D Wysong <hdwysong@gmail.com>
Already started, Jim. Is your logic similar to what James mentioned
(e.g. - if Switch A <canopy> is open and Switch B <throttle full> is
closed then sound the alarm)? How many contact/switch closures are
you monitoring?
D
-----
On Fri, 4 Mar 2005 10:04:11 -0500, Jim Stone <jrstone@insightbb.com> wrote:
> --> AeroElectric-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
> That's what I am looking for D.
> Jim
> When can you start on it?
Message 7
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| Subject: | Master alarm circuit |
--> AeroElectric-List message posted by: "Marcos Della" <mdella@cstone.com>
Ok, the circuit I have is for twelve annunciators hard wired for 5 ground active
and 6 hot active. The last is tied to the gear up and down lights (to provide
a gear transition light)...
I have the circuit board and parts list. I'm finishing up the schematic on electonic
copy and should have my second version PCBs back from the etcher by monday
for test.
Just curious (I'm running out of PCB space without a massive increase in cost)
would it be worth it to make the inputs "selectable" (meaning you can use either
a GND or + to activate the LAMP) (almost doubles the required components) and
also to install a "Master Caution" light? The problem I have with the master
caution is that of all my annunciators, only about 5 of them are actually cautions
whereas the others are indicators of things like "landing light", "taxi
light", "pitot heat", etc... I suppose I could install a header w/jumpers to
identify which ones are master caution and which ones aren't
This is actually an easy circuit (and I just finished the mod for the dimmer circuit,
thanks for the pointers guys) but does have a few space constraints. Also
geting a 337 signed off is going to be interesting for those with certified
aircraft (I have that, and once I install the new circuit, I'll have to do it
again... ugh)
Lastly, many people I have talked to want the dang thing built, not too many homebrew
hackers like me out there :-) Would it be worth it to anyone if I could
produce a few of these circuits for their aircraft? Price is probably going
to be somewhere around $100 for the boards and stuff (better in a case, but everything
costs a little more :-)
My indicators can be seen in this picture...
http://www.geekstyle.net/gallery/N5877C-Instrument-Panel-Repairs/IMG_0314
This is a really old picture, (shows stuff that isn't even in the panel anymore)
I should have newer pictures up this evening (I've been a little lax in the
photo part of the installation)...
Marcos
________________________________
From: owner-aeroelectric-list-server@matronics.com on behalf of Jim Stone
Subject: Re: AeroElectric-List: Master alarm circuit
--> AeroElectric-List message posted by: "Jim Stone" <jrstone@insightbb.com>
That's what I am looking for D.
Jim
When can you start on it?
----- Original Message -----
From: "D Wysong" <hdwysong@gmail.com>
Subject: Re: AeroElectric-List: Master alarm circuit
> --> AeroElectric-List message posted by: D Wysong <hdwysong@gmail.com>
>
> > my usual work mode assumes that the "computer" is physically built
> > before it gets to me...
>
> Understood, although some days I'd still prefer an old HeathKit. :-) I
> hope I didn't insult you with the cartoons.
>
> Theory aside, perhaps you'd be willing to specify a few things for a
> potential developer?
> -- how many 'contact closures' do you want to monitor?
> -- how many of those need to be compared (canopy latch vs. throttle fwd,
> gear up vs. throttle aft, etc.)?
> -- single 'master alarm' for everything? Perhaps a master (that grabs
> your attention) with a separate caution/advisory panel that IDs the
> specific trigger??
>
> D
>
> ---------------
> do not archive
>
>
Message 8
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| Subject: | Question about dimmer circuits and annunicators... |
--> AeroElectric-List message posted by: "Marcos Della" <mdella@cstone.com>
Absolutely! I'm AutoCAD LT 2005 myself...
mdella@cstone.com
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Fiveonepw@aol.com
Subject: Re: AeroElectric-List: Question about dimmer circuits and
annunicators...
--> AeroElectric-List message posted by: Fiveonepw@aol.com
In a message dated 3/2/05 11:12:30 PM Central Standard Time,
mdella@cstone.com writes:
> Should I just leave it tied
> to power and not bother with worrying about the annunicators being too
> bright at night
>>>
Hi Marcos- IMHO you definately need BRT/DIM capability, especially if
your
annunciator is mounted direct center of vision. I used zener diodes and
a
BRT/DIM toggle switch on my 10 function LED annunciator and it works
well- you can
play with the zener diodes and LED resistor values to achieve the levels
you
desire. If you can do AutoCAD (I'm R14) I can send you a copy of my
circuits,
if you'd like...
Mark Phillips
Message 9
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| Subject: | Re: Master alarm circuit |
--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
Sounds like you have just about what I'm looking for.
> --> AeroElectric-List message posted by: "Marcos Della"
> <mdella@cstone.com>
>
> Ok, the circuit I have is for twelve annunciators hard wired for 5 ground
> active and 6 hot active. The last is tied to the gear up and down lights
> (to provide a gear transition light)...
Sounds about right...but positive feed indicator lights are rather simple in
nature and in my case, have already been installed. I'm really only
interested in the "ground" triggered warning lights/alarm circuit. In
fact, I think that a indicator bank like you have is a great idea if
designed into the panel, but for retrofits like this one, many of the
individual lights are already in place - the alarm portion however, is not.
> Just curious (I'm running out of PCB space without a massive increase in
> cost) would it be worth it to make the inputs "selectable" (meaning you
> can use either a GND or + to activate the LAMP) (almost doubles the
> required components) and also to install a "Master Caution" light? The
> problem I have with the master caution is that of all my annunciators,
> only about 5 of them are actually cautions whereas the others are
> indicators of things like "landing light", "taxi light", "pitot heat",
> etc... I suppose I could install a header w/jumpers to identify which
> ones are master caution and which ones aren't
In a matrixed design, there would have to be a way to select the trigger
inclusion for master alarm. I would think that several positive inputs
could be routed through your device to drive lights only very easily.
Negative logic could too, as the PCB would just be in the middle of trigger
switch, light and power source. It would help builder creat a nexus of all
indicator and alarm wiring inputs...then a condolidated output to individual
or banked indicator lights, and the master alarm. If there were 5x5 neg/pos
input triggers, with or without individual indicator lights, that could be
selectable for master alarm or not...that would be the ticket.
I also think that a seperate, ground logic based indicator circuit for
throttle/gear warn and transition/lock indicators would be preferable.
However, remember that some aircraft don't have 3 retractable gear, so I
would think the position indicator and "squat or lock" circuits might need
to be seperate.
For my immediate need, I just need the alarm circuit and the allowance for
multiple (2-3) triggers. Canopy open and gear warns are all I'm looking at
for the moment but a more versital configuration would be needed for a
"product".
> Lastly, many people I have talked to want the dang thing built, not too
> many homebrew hackers like me out there :-) Would it be worth it to
> anyone if I could produce a few of these circuits for their aircraft?
> Price is probably going to be somewhere around $100 for the boards and
> stuff (better in a case, but everything costs a little more :-)
I'm willing to build the circuit myself...I just don't possess the knowledge
to design it, or print PCBs. I could probably solder board it if I have a
schematic and parts list.
Sounds like you're on the right track here.
James Redmon
Berkut #013 N97TX
http://www.berkut13.com
Message 10
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| Subject: | Flap Motor Warning |
--> AeroElectric-List message posted by: Sigmo@aol.com
Caution: If you are using a Commercial Aircraft products Flap motor DO NOT
break one of the up or down roller limit switches.
The V3L-3 Honeywell/Micro switch has been discontinued and after trying
extensively to locate another switch that will fit the D145 flap motor I am unable
to find one of the right dimensions that will work on this design.
Commercial Aircraft will not sell you one of their stock. Honeywell will not
sell you one of their stock. The authorized suppliers will sell you one of
these $5 switches for $50 to $70 dollars which will be shipped from Honeywell.
An expensive lesson learned about using loctite and trying to remove the
screw.....
P.S. I bought the only two I could find on the Honeywell dealers inventory
list that were less than $50 and they were $28 each.
Mike Sigman
Zodiac 601XL N7092N
Message 11
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| Subject: | Re: Master alarm circuit |
--> AeroElectric-List message posted by: rv-9a-online <rv-9a-online@telus.net>
Good luck with this, Marcos. I hope my suggestions have helped.
If anyone is looking for a 4-channel version of such a device (easy to
make 8, 12, 16...), then you go to
http://www3.telus.net/aviation/vx
Look for the IL-4A. The .pdf document has all of the technical
information, including a schematic.
The IL-4A has programmable inputs (high sense, low sense) and the
ability to monitor reversing functions (flap motors, gear motors).
Although it only drives four lamps, it can sense up to eight inputs,
allowing sharing of lamps.
Vern Little, RV-9A
Marcos Della wrote:
>--> AeroElectric-List message posted by: "Marcos Della" <mdella@cstone.com>
>
>Ok, the circuit I have is for twelve annunciators hard wired for 5 ground active
and 6 hot active. The last is tied to the gear up and down lights (to provide
a gear transition light)...
>
>I have the circuit board and parts list. I'm finishing up the schematic on electonic
copy and should have my second version PCBs back from the etcher by monday
for test.
>
>Just curious (I'm running out of PCB space without a massive increase in cost)
would it be worth it to make the inputs "selectable" (meaning you can use either
a GND or + to activate the LAMP) (almost doubles the required components)
and also to install a "Master Caution" light? The problem I have with the master
caution is that of all my annunciators, only about 5 of them are actually
cautions whereas the others are indicators of things like "landing light", "taxi
light", "pitot heat", etc... I suppose I could install a header w/jumpers
to identify which ones are master caution and which ones aren't
>
>This is actually an easy circuit (and I just finished the mod for the dimmer circuit,
thanks for the pointers guys) but does have a few space constraints.
Also geting a 337 signed off is going to be interesting for those with certified
aircraft (I have that, and once I install the new circuit, I'll have to do
it again... ugh)
>
>Lastly, many people I have talked to want the dang thing built, not too many homebrew
hackers like me out there :-) Would it be worth it to anyone if I could
produce a few of these circuits for their aircraft? Price is probably going
to be somewhere around $100 for the boards and stuff (better in a case, but
everything costs a little more :-)
>
>My indicators can be seen in this picture...
>http://www.geekstyle.net/gallery/N5877C-Instrument-Panel-Repairs/IMG_0314
>
>This is a really old picture, (shows stuff that isn't even in the panel anymore)
I should have newer pictures up this evening (I've been a little lax in the
photo part of the installation)...
>
>Marcos
>
>
>________________________________
>
>From: owner-aeroelectric-list-server@matronics.com on behalf of Jim Stone
>To: aeroelectric-list@matronics.com
>Subject: Re: AeroElectric-List: Master alarm circuit
>
>
>--> AeroElectric-List message posted by: "Jim Stone" <jrstone@insightbb.com>
>
>That's what I am looking for D.
>Jim
>When can you start on it?
>----- Original Message -----
>From: "D Wysong" <hdwysong@gmail.com>
>To: <aeroelectric-list@matronics.com>
>Subject: Re: AeroElectric-List: Master alarm circuit
>
>
>
>
>>--> AeroElectric-List message posted by: D Wysong <hdwysong@gmail.com>
>>
>>
>>
>>>my usual work mode assumes that the "computer" is physically built
>>>before it gets to me...
>>>
>>>
>>Understood, although some days I'd still prefer an old HeathKit. :-) I
>>hope I didn't insult you with the cartoons.
>>
>>Theory aside, perhaps you'd be willing to specify a few things for a
>>potential developer?
>>-- how many 'contact closures' do you want to monitor?
>>-- how many of those need to be compared (canopy latch vs. throttle fwd,
>>gear up vs. throttle aft, etc.)?
>>-- single 'master alarm' for everything? Perhaps a master (that grabs
>>your attention) with a separate caution/advisory panel that IDs the
>>specific trigger??
>>
>>D
>>
>>---------------
>>do not archive
>>
>>
>>
>>
>
>
>
>
--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Message 12
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| Subject: | Re: EFIS Backup Battery and fuseblocks - Attn Bob |
--> AeroElectric-List message posted by: "John Schroeder" <jschroeder@perigee.net>
On Fri, 4 Mar 2005 06:16:07 -0500, Mike & Lee Anne Wiebe
<mwiebe@sympatico.ca> wrote:
> I really like the fuseblock idea instead of acres of breakers. But this
> design requires four buses, so we're starting to get "acres of buses".
> When you divvy up the load this way, there are not many circuits on each
> bus. What would be ideal is one common mechanical bus, with the ability
> to segregate it electrically. Obviously nobody is likely to have it set
> up the way I want, but perhaps yours (or other products?) can be "cut"
> and fed from both ends, so that each mechanical block is good for two
> electrical buses? Thoughts?
Mike - Bussman makes a series of fuse blocks now that do just what you
want. We installed two blocks, but each is electrically segregatged into
20 & 8 fuses per sections. This is overkill for us but we had intended to
have the two smaller busses feed a FADEC system.Try looking at their 15710
series on their website. Also, David Schwartzenruber is stocking some of
these blocks. I don't have his email address handy, nor his website. When
I get home next week, I could send you a .pdf file of their drawings and a
picture of our installed blocks.
Cheers,
John
--
Using Opera's revolutionary e-mail client: http://www.opera.com/m2/
Message 13
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| Subject: | Re: WD-40 as Contact Cleaner |
--> AeroElectric-List message posted by: Dww0708@aol.com
After the penetrates evaporate from the WD 40 I actually leaves a sticky
residue that attracts moisture. Documented
Message 14
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| Subject: | Re: Master alarm circuit |
--> AeroElectric-List message posted by: rv-9a-online <rv-9a-online@telus.net>
James, are your switches wired with normally open and normally closed
contacts (like lever 'microswitches')? If so, it makes it very easy to
produce the alarms you want without fancy logic circuits.
For example, if you used the switches so that they were 'off' when
actuated (i.e. the switches are 'open' when canopy is open and the
throttle is advanced), then you could just wire the switches together
and connect them to an input on the IL-4A lamp controller, programmed
for active high sense. (see http://www3.telus.net/aviation/vx). You'd
need to wire in a 'pull-up' resistor to make this work.
Thanks, Vern Little
James Redmon wrote:
>--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
>
>Sounds like you have just about what I'm looking for.
>
>
>
>>--> AeroElectric-List message posted by: "Marcos Della"
>><mdella@cstone.com>
>>
>>Ok, the circuit I have is for twelve annunciators hard wired for 5 ground
>>active and 6 hot active. The last is tied to the gear up and down lights
>>(to provide a gear transition light)...
>>
>>
>
>Sounds about right...but positive feed indicator lights are rather simple in
>nature and in my case, have already been installed. I'm really only
>interested in the "ground" triggered warning lights/alarm circuit. In
>fact, I think that a indicator bank like you have is a great idea if
>designed into the panel, but for retrofits like this one, many of the
>individual lights are already in place - the alarm portion however, is not.
>
>
>
>>Just curious (I'm running out of PCB space without a massive increase in
>>cost) would it be worth it to make the inputs "selectable" (meaning you
>>can use either a GND or + to activate the LAMP) (almost doubles the
>>required components) and also to install a "Master Caution" light? The
>>problem I have with the master caution is that of all my annunciators,
>>only about 5 of them are actually cautions whereas the others are
>>indicators of things like "landing light", "taxi light", "pitot heat",
>>etc... I suppose I could install a header w/jumpers to identify which
>>ones are master caution and which ones aren't
>>
>>
>
>In a matrixed design, there would have to be a way to select the trigger
>inclusion for master alarm. I would think that several positive inputs
>could be routed through your device to drive lights only very easily.
>Negative logic could too, as the PCB would just be in the middle of trigger
>switch, light and power source. It would help builder creat a nexus of all
>indicator and alarm wiring inputs...then a condolidated output to individual
>or banked indicator lights, and the master alarm. If there were 5x5 neg/pos
>input triggers, with or without individual indicator lights, that could be
>selectable for master alarm or not...that would be the ticket.
>
>I also think that a seperate, ground logic based indicator circuit for
>throttle/gear warn and transition/lock indicators would be preferable.
>However, remember that some aircraft don't have 3 retractable gear, so I
>would think the position indicator and "squat or lock" circuits might need
>to be seperate.
>
>For my immediate need, I just need the alarm circuit and the allowance for
>multiple (2-3) triggers. Canopy open and gear warns are all I'm looking at
>for the moment but a more versital configuration would be needed for a
>"product".
>
>
>
>>Lastly, many people I have talked to want the dang thing built, not too
>>many homebrew hackers like me out there :-) Would it be worth it to
>>anyone if I could produce a few of these circuits for their aircraft?
>>Price is probably going to be somewhere around $100 for the boards and
>>stuff (better in a case, but everything costs a little more :-)
>>
>>
>
>I'm willing to build the circuit myself...I just don't possess the knowledge
>to design it, or print PCBs. I could probably solder board it if I have a
>schematic and parts list.
>
>Sounds like you're on the right track here.
>
>James Redmon
>Berkut #013 N97TX
>http://www.berkut13.com
>
>
>
>
--
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| Subject: | Re: Master alarm circuit |
--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
> James, are your switches wired with normally open and normally closed
> contacts (like lever 'microswitches')? If so, it makes it very easy to
> produce the alarms you want without fancy logic circuits.
Thanks, and this is true. However, the problem here is that I'm not looking
just for a buzzer and blinking light. I'm actually looking for a resetable
alarm circuit. One that is triggered by the manual switch logic, sounds the
alarm (light and buzzer) and has a momentary mute (or acknowledge) button.
It would need to continue to illuminate the warning light as long as the
condition exists but silence the buzzer. If a different alarm condition
occurs at the same time, it should re-engage the buzzer. Once the alarm
condition is removed, then the circuit resets (light off, buzzer off).
Unfortunately, I can't get that from just manual switches, and/or a light
bank.
My fall back position is a simple switch/light/buzzer combo that will use a
manual on/off switch for the buzzer...no logic, not idiot proof, not
optimum.
James Redmon
Berkut #013 N97TX
http://www.berkut13.com
Message 16
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| Subject: | Master alarm circuit |
--> AeroElectric-List message posted by: Roy Wheaton <roy_wheaton@yahoo.com>
The type of alarm you are referring to is not a major design project. We have
created several types of monitoring systems for motorcycles, race vehicles,
watercraft, construction equipment, and light aircraft that are close to what
you are looking for.
Modern microprocessor and software allow you to create a device that will
monitor several parameters, and give programmable visual, audible, and spoken
responses based on pre-selected events. For example, we created a system for a
rally race car that would monitor oil pressure, charging system voltage, engine
coolant temperature, transmission coolant temperature and engine speed. If a
problem occurred, the microprocessor would alert the driver and co-driver by
selecting the correct message and "speaking" it through the intercom system. A
woman's voice was used because it has been determined by various research
groups that it produces less stress in the operator / pilot. Configurable
outputs were provided for external devices such as flashing v/s steady LEDs,
piezo alarms, etc.
I have a unit that has 16 configurable inputs (battery or ground activated) and
is capable of sounding unique sounds for different events. It also has 6 analog
inputs for monitoring charging system voltage, Oil pressure, etc.
Our first product was designed for use on motorcycles. It monitors the charging
system and oil pressure switch and sounds a falling sound if the charging
system falls below a preset level, a rising tone if the voltage is too high,
and a pulsating tone if oil pressure fails. You can see that unit at
http://www.eguardsystems.com
If you have any questions, or would like a solution tailored to your unique
requirements, please feel free to contact me.
Message 17
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| Subject: | Re: Master alarm circuit |
--> AeroElectric-List message posted by: rv-9a-online <rv-9a-online@telus.net>
Right. What you are looking for is a bit more sophisticated. You can't
just turn off the alarm buzzer because you may miss a second alarm.
This functionality is in the Rocky Mountain Micromonitor, but I assume
that you are not using it or don't have room for it.
I'll keep my eyes open for something more appropriate.
Vern
James Redmon wrote:
>--> AeroElectric-List message posted by: "James Redmon" <james@berkut13.com>
>
>
>
>>James, are your switches wired with normally open and normally closed
>>contacts (like lever 'microswitches')? If so, it makes it very easy to
>>produce the alarms you want without fancy logic circuits.
>>
>>
>
>
>Thanks, and this is true. However, the problem here is that I'm not looking
>just for a buzzer and blinking light. I'm actually looking for a resetable
>alarm circuit. One that is triggered by the manual switch logic, sounds the
>alarm (light and buzzer) and has a momentary mute (or acknowledge) button.
>It would need to continue to illuminate the warning light as long as the
>condition exists but silence the buzzer. If a different alarm condition
>occurs at the same time, it should re-engage the buzzer. Once the alarm
>condition is removed, then the circuit resets (light off, buzzer off).
>
>Unfortunately, I can't get that from just manual switches, and/or a light
>bank.
>
>My fall back position is a simple switch/light/buzzer combo that will use a
>manual on/off switch for the buzzer...no logic, not idiot proof, not
>optimum.
>
>James Redmon
>Berkut #013 N97TX
>http://www.berkut13.com
>
>
>
>
--
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Checked by AVG Anti-Virus.
Message 18
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| Subject: | Re: APU vs battery |
--> AeroElectric-List message posted by: Speedy11@aol.com
In a message dated 3/3/2005 6:52:44 AM Eastern Standard Time,
aeroelectric-list-digest@matronics.com writes:
Are tiny APU's reasonable for tiny airplanes?---
Eric,
You crack me up. : )
You are causing me to stretch mentally.
The APU idea may have merit.
Stan Sutterfield
Message 19
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| Subject: | OBAM Configuration |
--> AeroElectric-List message posted by: <bakerocb@cox.net>
AeroElectric-List message previously posted by: "Robert L. Nuckolls, III"
<b.nuckolls@cox.net>
<<....skip.....But make no mistake about it folks, your OBAM airplane's
configuration belongs to YOU and no one else.....skip.....Bob . . .>>
3/4/2005
Hello Bob Nuckolls, Your statement above could mislead people.
The Special Airworthiness certificate issued to each amateur built
experimental aircraft includes Operating Limitations for that aircraft. The
Operating Limitations will include the following sentence: "After completion
of phase I flight testing, unless appropriately equipped for night and/or
instrument flight in accordance with 91.205, this aircraft is to be
operated under VFR, day only."
The FAA policy regarding this sentence is:
1) If the aircraft is flown day VFR only it does not need to meet any of
the instrumentation or equipment requirements of FAR Sec. 91.205.
2) If the aircraft is flown VFR at night it must comply with the
requirements of FAR Sec. 91.205 (b) and (c).
3) If the aircraft is flown IFR it must comply with the requirements of FAR
Sec. 91.205 (b), (c), and (d).
These three FAR paragraphs list the instrumentation and equipment required
for day VFR, night VFR, and IFR respectively.
In addition:
1) FAR Sec. 91.207 lists flight conditions under which aircraft must have
ELT's.
2) FAR Sec. 91.215 lists flight conditions under which aircraft must have
transponders.
Amateur built experimental aircraft are not excused from either of these two
equipment requirements in those applicable flight conditions
OC
Message 20
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| Subject: | Re: APU vs battery |
--> AeroElectric-List message posted by: "Wayne Sweet" <w_sweet@comcast.net>
One more comment; my friend, a retired FedEx 747 captain told me when I
mentioned about this thread, that the APU on the 747 would frequently quit
because of lack of oil, or some other maintenance issue. It only had two
gauges, which I have forgotten what they were, but he stated the gauges did
not indicate much about the status of the APU, other than it was running or
not running.
The 747 also had batteries, a 24 volt system. Now if a 747 (ahhh, that
qualifies as a BIG airplane) has batteries, my little P.A. two seater will
live it's life without an APU.
However this thread did provides some giggles.
Wayne
----- Original Message -----
From: <Speedy11@aol.com>
Subject: AeroElectric-List: Re: APU vs battery
> --> AeroElectric-List message posted by: Speedy11@aol.com
>
> In a message dated 3/3/2005 6:52:44 AM Eastern Standard Time,
> aeroelectric-list-digest@matronics.com writes:
> Are tiny APU's reasonable for tiny airplanes?---
> Eric,
> You crack me up. : )
> You are causing me to stretch mentally.
> The APU idea may have merit.
> Stan Sutterfield
>
>
>
Message 21
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| Subject: | Re: APU vs battery |
--> AeroElectric-List message posted by: B Tomm <fvalarm@rapidnet.net>
how about this...
www.basicaircraft.com
Bevan
-----Original Message-----
From: Speedy11@aol.com [SMTP:Speedy11@aol.com]
Subject: AeroElectric-List: Re: APU vs battery
--> AeroElectric-List message posted by: Speedy11@aol.com
In a message dated 3/3/2005 6:52:44 AM Eastern Standard Time,
aeroelectric-list-digest@matronics.com writes:
Are tiny APU's reasonable for tiny airplanes?---
Eric,
You crack me up. : )
You are causing me to stretch mentally.
The APU idea may have merit.
Stan Sutterfield
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