Matronics Email Lists

Open Source Avionics, something we have discussed on the list is also happening over at MakerPlane as part of their open source aircraft work...

http://makerplane.org/?p=1050

Greg McHugh

Bob,

Below is the memory usage summary. As shown, the PRO compiler
($1195) provides optimization compared to the free LITE version I am
using.

Currently I am using 22.9% of the 2K bytes of pro ...

Bob,

I mailed the new PIC chip off today. Here is the source code for this
version with the new control logic using separate switches for each
lamp.

Greg McHugh

Bob,

I have a new version of the software that implements the new
control logic and can flash it into a PIC and send it along. I
tested it on a breadboard and it seems to be working fine.
I need ...

Bob,

Thanks for the info. I recall a story of a Cessna fire related to ground
power and a Lithium Ion battery and then an FAA AD for these batteries,
but I was not aware of a fire involving a Lit ...

Bob,

I notice on some of the documents from AeroElectric there is a
Metal Oxide Varistor across the switch contacts on some of the
examples of switches controlling battery contractors but they
a ...

Bob,

That seems to be a good solution. I will spin a version of the
software for this and send another PIC chip along to you.
Probably sent off to you by the end of the week.

Greg McHugh

Bob,

I won't attempt to make the changes to the board. I will send
out a flashed PIC today with the default code that I have
been using for testing. When you send me a board with
the inputs rec ...

Bob,

I am planning to use it in the Xenos motor glider I am building but
I am probably a year away from the point where I will need it. I
think I will stick with the single flash rate on my insta ...

Bob,

Had a chance to power-up the proof of concept board you sent and
it seems to be working fine with my current software version which
I updated to reflect the final hardware I/O configuration ...

Bob,

Hardware arrived in the mail today. I should have some test
results by the end of the week.

Greg McHugh

Peter,

As a starting point I would take a look at the ArduPilot software to
see if there is an option to simplify it down to what you need. The
complete autopilot functionality is there but I don ...

Bob,

Very good, I will test the software with the hardware. I had
also considered using the last two inputs to control the wig-wag
interval. I have it set to 750 millisec at the moment which seem ...

Bob,

Send one out to me, please...

I will test the current software and if it checks out I will flash some
PIC12F683 chips and send them out to you. If there is anyone else
who is getting one ...

Bob,

They sure look like Weather Pack fuse holders maybe from

http://www.whiteproducts.com/

and the Blue Sea version is on Amazon for $9

http://tinyurl.com/7tzcmc2

Greg

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 ...

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 ...

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. ...

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 m ...

Here is the initial version of software for the Open Source Wig-Wag
project. I am sending this out for anyone who is interested to take
a look at the code as it stands today and provide feedback. Th ...