Today's Message Index:
----------------------
1. 04:47 AM - Re: Top Aviation Website Award (nuckollsr)
2. 07:14 AM - Re: Configuration for reset options on the PIC12F683 for Wig-Wag (Ken)
3. 07:44 AM - Re: Another Open Source controller idea (gregmchugh)
4. 08:53 AM - Re: Configuration for reset options on the PIC12F683 for Wig-Wa (gregmchugh)
5. 09:39 AM - Re: Re: Another Open Source controller idea (Julio Salazar)
6. 10:15 AM - Re: Configuration for reset options on the PIC12F683 for Wig-Wag (Robert L. Nuckolls, III)
7. 10:21 AM - Your subscription (Robert L. Nuckolls, III)
8. 10:31 AM - Re: Re: Top Aviation Website Award (Julio Salazar)
9. 10:37 AM - Re: Configuration for reset options on the PIC12F683 for Wig-Wag (Robert L. Nuckolls, III)
10. 01:15 PM - Re: Re: Top Aviation Website Award (Dan Billingsley)
11. 03:25 PM - Developing the initial software for the wig-wag project (gregmchugh)
12. 05:48 PM - Re: Re: Another Open Source controller idea (Ralph Finch)
13. 08:55 PM - Shunt insulation (Stuart Hutchison)
Message 1
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| Subject: | Re: Top Aviation Website Award |
Thank you sir. That came right out of the blue some time back. I got an e-mail
announcing the selection of aeroelectric.com to carry the logo. At first I thought
it was some sort of promotional thing but I visited their main website and
found that the spirit and intent of their efforts agreed with their advertisements.
Never learned how they 'found' the website, they didn't mention any sort of nomination
process. Nevertheless, I'm pleased that they recognized the effort for
what it promotes. Just wish I had more time to finish indexing the website's
content. It's getting so big I can't find things as quickly as I used to!
Bob . . .
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=371979#371979
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| Subject: | Re: Configuration for reset options on the PIC12F683 |
for Wig-Wag
I would not be concerned about a manual/external reset. The system
should self correct for the inevitable glitches or power anomalies. If
this chip has a watchdog timer or equivalent I would probably use it.
ie the chip does a Reset every xx seconds unless the main software
routine sets a bit before xx seconds to indicate that it is operating
normally. On some chips that might also cover for brown out/power on
resets but I've never used a PIC.
Ken
do not archive
On 27/04/2012 2:28 PM, gregmchugh wrote:
> --> AeroElectric-List message posted by: "gregmchugh"<gregmchugh@aol.com>
>
> Bob,
>
> I had a question on which of the reset options should be set up
> for the PIC12F683 on the wig-wag project besides the Power
> On Reset. Looking at the PIC12F683 document it wasn't obvious
> to me which options to enable...
>
> Should the Brown Out Reset and the Power On Timer
> functions be enabled for the chip?
>
> Also, did you want the external reset line (MCLR) to be enabled?
>
> I will set up the Configuration Bits as needed...
>
> Greg McHugh
>
Message 3
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| Subject: | Re: Another Open Source controller idea |
Ralph,
Looks like an interesting project. Without seeing more detail on the
various functions and the interfaces between the modules it is
hard to assess what might be needed for the application. My initial
reaction is that it would be a candidate for using an Arduino based
module. Arduino is an open source hardware/software design with
just about any type of interface and graphics display already
designed and readily available. If you want to proceed with the
project I would recommend putting together a simple system
block diagram showing the interfaces between the various
system components and some idea of the information passed
through the interfaces. If you take a look at info on Arduino
options you should be able to get an idea of what can be done
with off-the-shelf hardware and software. Especially for a touch
screen display you will find the hardware and software drivers
already done for Arduino. Take a look at Sparkfun or Adafruit
websites for a good overview of what is already available.
I expect you could also use one of the PIC processors and a
specific controller design but it might be hard to beat the
fast time-to-complete you would get with Arduino. The price
of Arduino hardware is generally pretty good also.
How big of a touch screen display are you considering? If it
gets large you might also consider the possibility an
off the shelf Android Tablet for the display. The price of generic
Android tablets is getting pretty low.
Greg McHugh
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=371994#371994
Message 4
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| Subject: | Re: Configuration for reset options on the PIC12F683 |
for Wig-Wa
I had not planned to activate the Watchdog Timer but it would be
easy to enable it. Might be good to have it in place for future
applications. My goal for the initial wig-wag code was to make
it as simple as possible as a starting point for future development.
However, adding the Watchdog is probably a good choice. In fact,
I had considered leaving out the switch de-bounce logic since it
probably is not needed for the wig-wag with toggle switches but
it will be needed for the future so I included a de-bounce function.
Watchdog fits into the same plan of not needed now but a useful
addition to support added functionality...
Greg McHugh
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372002#372002
Message 5
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| Subject: | Re: Another Open Source controller idea |
UNSUBSCRIBE=0A=0A=0AJulio Salazar Cerda=0ANO TEMAS; SOLAMENTE TEN FE=0ASan
Lucas 8, 50=0A=9COnly when the last tree has died, the last river has
been poisoned, and the last fish has been caught will =0Awe realize we can
not eat money."=0A=0A=0A>________________________________=0A> De: gregmchug
h <gregmchugh@aol.com>=0A>Para: aeroelectric-list@matronics.com =0A>Enviado
: S=C3=A1bado, 28 de abril, 2012 9:41 A.M.=0A>Asunto: AeroElectric-List: Re
: Another Open Source controller idea=0A> =0A>--> AeroElectric-List messag
e posted by: "gregmchugh" <gregmchugh@aol.com>=0A>=0A>Ralph,=0A>=0A>Looks l
ike an interesting project. Without seeing more detail on the=0A>various fu
nctions and the interfaces between the modules it is=0A>hard to assess what
might be needed for the application. My initial=0A>reaction is that it wou
ld be a candidate for using an Arduino based=0A>module. Arduino is an open
source hardware/software design with=0A>just about any type of interface an
d graphics display already=0A>designed and readily available. If you want t
o proceed with the=0A>project I would recommend putting together a simple s
ystem=0A>block diagram showing the interfaces between the various =0A>syste
m components and some idea of the information passed=0A>through the interfa
ces. If you take a look at info on Arduino=0A>options you should be able to
get an idea of what can be done=0A>with off-the-shelf hardware and softwar
e. Especially for a touch=0A>screen display you will find the hardware and
software drivers=0A>already done for Arduino. Take a look at Sparkfun or Ad
afruit=0A>websites for a good overview of what is already available.=0A>=0A
>I expect you could also use one of the PIC processors and a=0A>specific co
ntroller design but it might be hard to beat the=0A>fast time-to-complete y
ou would get with Arduino. The price=0A>of Arduino hardware is generally pr
etty good also. =0A>=0A>How big of a touch screen display are you consideri
ng? If it=0A>gets large you might also consider the possibility an=0A>off t
he shelf Android Tablet for the display. The price of generic=0A>Android ta
blets is getting pretty low.=0A>=0A>Greg McHugh=0A>=0A>=0A>=0A>=0A>Read thi
s topic online here:=0A>=0A>http://forums.matronics.com/viewtopic.php?p=3
- =C2- =C2- =C2- =C2- =C2- =C2- - MATRONICS WEB FORUMS -=0A>
===0A>=0A>=0A>=0A>=0A>=0A>
Message 6
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| Subject: | Re: Configuration for reset options on the PIC12F683 |
for Wig-Wag
At 01:28 PM 4/27/2012, you wrote:
Bob,
I had a question on which of the reset options should be set up
for the PIC12F683 on the wig-wag project besides the Power
On Reset. Looking at the PIC12F683 document it wasn't obvious
to me which options to enable...
Should the Brown Out Reset and the Power On Timer
functions be enabled for the chip?
I think I'd go for the usual orderly start
at power up. This isn't a system that is likely
to wander off into the weeds . . . or create a
tense day in the cockpit if it did.
Your question gives rise to an interesting
follow on. Suppose the thing simply craps. How
will the pilot know it?
On first pass I seems that a pre-flight test
might be satisfied by turning the system on
to both mode and watching for certain increase
in load current for both modes. This pre-supposes
the airplane is fitted with loads instrumentation
with enough resolution to detect the new, lower
current LED fixtures.
Alternatively, we might add a tell-tale led to
the installation drawings that comes on with just
one of lamps. One could see that it flashes in
wig-wag mode and is steady in landing light mode.
If I were offering a product like this to the
TC aircraft world, they would probably ask for
a FAIL detector and light driver. Can be done
with a two resistors, small fet and a capacitor.
There's enough room on the board but we'd have
to shuffle some pins.
Good question to address in the PPOC (post proof
of concept) phase. For now, assume all is right
with the world after spool-up from cold start and
revisit this later.
Also, did you want the external reset line (MCLR) to be enabled?
No, it's pulled up with an external resistor and
used as an general purpose input only.
Bob . . .
Message 7
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| Subject: | Your subscription |
At 02:30 PM 4/27/2012, you wrote:
>UNSUBSCRIBE
>
Julio,
I checked your subscription status for this List and found
that for some reason, you were subscribed to all the Matronics
List for both running dialog and the digest versions. No doubt
this has flooded your mailbox.
I have UNsuscribed you to all Matronics forum mailings. You
will receive a email notification from matronics asking you
to confirm this action. Follow the instructions in the email
and you will stop the blizzard of information.
Bob . . .
Message 8
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| Subject: | Re: Top Aviation Website Award |
UNSUBSCRIBE=0A=0A=0AJulio Salazar Cerda=0ANO TEMAS; SOLAMENTE TEN FE=0ASan
Lucas 8, 50=0A=9COnly when the last tree has died, the last river has
been poisoned, and the last fish has been caught will =0Awe realize we can
not eat money."=0A=0A=0A>________________________________=0A> De: nuckollsr
<bob.nuckolls@aeroelectric.com>=0A>Para: aeroelectric-list@matronics.com
=0A>Enviado: S=C3=A1bado, 28 de abril, 2012 6:45 A.M.=0A>Asunto: AeroElectr
ic-List: Re: Top Aviation Website Award=0A> =0A>--> AeroElectric-List mess
age posted by: "nuckollsr" <bob.nuckolls@aeroelectric.com>=0A>=0A>Thank you
sir. That came right out of the blue some time back.=C2- I got an e-mail
announcing the selection of aeroelectric.com to carry the logo. At first I
thought it was some sort of promotional thing but I visited their main web
site and found that the spirit and intent of their efforts agreed with thei
r advertisements.=0A>=0A>Never learned how they 'found' the website, they d
idn't mention any sort of nomination process. Nevertheless, I'm pleased tha
t they recognized the effort for what it promotes. Just wish I had more tim
e to finish indexing the website's content. It's getting so big I can't fin
d things as quickly as I used to!=0A>=0A>Bob . . .=0A>=0A>=0A>=0A>=0A>Read
this topic online here:=0A>=0A>http://forums.matronics.com/viewtopic.php?p
==C2- =C2- =C2- =C2- =C2- =C2- =C2- - MATRONICS WEB FORUMS
======0A>=0A>=0A>=0A>=0A>=0A>
Message 9
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| Subject: | Re: Configuration for reset options on the PIC12F683 |
for Wig-Wag
Alternatively, we might add a tell-tale led to
the installation drawings that comes on with just
one of lamps. One could see that it flashes in
wig-wag mode and is steady in landing light mode.
If I were offering a product like this to the
TC aircraft world, they would probably ask for
a FAIL detector and light driver. Can be done
with a two resistors, small fet and a capacitor.
-----------------------
Expanding that train of thought. GP2(Pin5) is not
used in the Wig-Wag controller. You could write this
port HI and LO along with, say GP5(Pin 2). We could
wire an external LED from P1-10 to ground. The pull
up would give 1 mA of drive to the LED . . . probably
enough for useful light output as a tell-tale.
This argues with the legacy philosophy of never taking
any connection to silicon directly to the outside world.
In this case, the LED would be on the end of a shielded
wire terminated at the controller. This level of protection
from ingress of EMC uglies is probably sufficient to
protect the PICChip. I'll pray over that idea some
more . . .
Bob . . .
Message 10
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| Subject: | Re: Top Aviation Website Award |
Very well deserved Bob! Your efforts in the world of all things electrons h
as benefited a vast number of folks. Your book comes up in every blog I fre
quent as the Go-To manual for aviation electronics, and I personally thank
you for all of your help.-=0ADan B=0AMesa, AZ=0A=0A=0A=0A>_______________
_________________=0A> From: nuckollsr <bob.nuckolls@aeroelectric.com>=0A>To
: aeroelectric-list@matronics.com =0A>Sent: Saturday, April 28, 2012 4:45 A
M=0A>Subject: AeroElectric-List: Re: Top Aviation Website Award=0A> =0A>-->
AeroElectric-List message posted by: "nuckollsr" <bob.nuckolls@aeroelectri
c.com>=0A>=0A>Thank you sir. That came right out of the blue some time back
.- I got an e-mail announcing the selection of aeroelectric.com to carry
the logo. At first I thought it was some sort of promotional thing but I vi
sited their main website and found that the spirit and intent of their effo
rts agreed with their advertisements.=0A>=0A>Never learned how they 'found'
the website, they didn't mention any sort of nomination process. Neverthel
ess, I'm pleased that they recognized the effort for what it promotes. Just
wish I had more time to finish indexing the website's content. It's gettin
g so big I can't find things as quickly as I used to!=0A>=0A>Bob . . .=0A>
=0A>=0A>=0A>=0A>Read this topic online here:=0A>=0A>http://forums.matronics
=========================0A
=========================0A
=========================0A
>=0A>=0A>=0A>=0A>=0A>
Message 11
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| Subject: | Developing the initial software for the wig-wag project |
Here is the document I put together describing the work involved with
the development of the initial software for the wig-wag controller. It
should give those who are interested some idea of what is involved
in the process. Hopefully others will jump into the pool and get
involved with putting together software for this project and future
follow-on projects. Take a look and, as always, I welcome any and
all feedback...
Greg McHugh
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=372025#372025
Attachments:
http://forums.matronics.com//files/developing_the_initial_software_for_the_open_source_wig_wag_project_677.pdf
Message 12
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| Subject: | Re: Another Open Source controller idea |
Thanks for the comments and ideas. I would like to learn enough about
modular electronics and controllers and the current Wig-Wag thread is
interesting.
I found a hint of what the Arduino can do investigating LEDs for cabin lighting:
http://www.ladyada.net/products/rgbledstrip/
And the beginnings of an account of one fellow's Arduino learning adventure:
http://arstechnica.com/gadgets/guides/2012/04/bitten-buy-the-maker-bug-one-mans-first-steps-with-arduino.ars
As to the Vertical Power application, of course I need to get more
information about the VP-X's inputs and outputs. I hope to keep
pursuing that idea as the company has no interest in it and I think
there is a lot of potential.
RF
On Apr 28, 2012, at 7:55 AM, gregmchugh <gregmchugh@aol.com> wrote:
>
> Ralph,
>
> Looks like an interesting project. Without seeing more detail on the
> various functions and the interfaces between the modules it is
> hard to assess what might be needed for the application. My initial
> reaction is that it would be a candidate for using an Arduino based
> module. Arduino is an open source hardware/software design with
> just about any type of interface and graphics display already
> designed and readily available. If you want to proceed with the
> project I would recommend putting together a simple system
> block diagram showing the interfaces between the various
> system components and some idea of the information passed
> through the interfaces. If you take a look at info on Arduino
> options you should be able to get an idea of what can be done
> with off-the-shelf hardware and software. Especially for a touch
> screen display you will find the hardware and software drivers
> already done for Arduino. Take a look at Sparkfun or Adafruit
> websites for a good overview of what is already available.
>
> I expect you could also use one of the PIC processors and a
> specific controller design but it might be hard to beat the
> fast time-to-complete you would get with Arduino. The price
> of Arduino hardware is generally pretty good also.
>
> How big of a touch screen display are you considering? If it
> gets large you might also consider the possibility an
> off the shelf Android Tablet for the display. The price of generic
> Android tablets is getting pretty low.
>
> Greg McHugh
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=371994#371994
>
>
Message 13
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| Subject: | Shunt insulation |
G'day Bob,
My shunt is mounted in the 'hot' wire between the live post of the starter
contactor (not measuring start currents) and the main and avionics busses.
The B-lead is upstream (so to speak - depends whether we're talking
electrons or holes !), so I can read the current into and out of the
battery. I've already 1A fused the signal leads (which go to my EFIS), but
I wanted additional insulation around the shunt to protect from shorts
should anything metalic fall between it and the fuselage during aerobatics.
I don't really understand how a shunt is calibrated, so I'm wondering if
clear heatshrink and having the shunt on the back of the firewall will alter
the temperature environment of the shunt enough to affect it's calibration?
You may be able to see the heatshrink in the photo ... which has holes
punched for the terminals to screw down.
Kind regards, Stu
F1 Rocket VH-FLY <http://www.mykitlog.com/RockFLY>
http://www.mykitlog.com/RockFLY <about:www.teamrocketaircraft.com>
www.teamrocketaircraft.com
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