REFLECTOR: Need a topic... gear down check

[Michael Watson]

I have the P/N 2050 gear warning system which so far works perfectly.
I have it set to 100 KIAS . If I go under 100 Knots with gears up, I get a
loud blast in my head set
GEAR UNSAFE. If gear is down, I get GEAR OK.  It was kind of pricey at
$585.00.
If you can do the same thing for $35, every one with a retract Velocity
should buy it.

http://www.flyingsafer.com/2050.htm


On Wed, Jan 23, 2013 at 11:56 AM, Dave T Nelson <dtnelson at us.ibm.com> wrote:

> OK, because the reflector is quiet, I'll bring the team up to speed on a
> little side project I've got going & again ask for any input...
>
> I've never been happy with the gear up warning system... I like to fly a
> tight pattern, and often times I won't have the throttle fully cut off
> until I'm right over the numbers.  A warning system based on throttle
> position therefore doesn't give much warning.  So, since winters are long
> here in Minnesota, I dreamed up a really complicated but maybe better
> solution.
>
> In net, I'm working on programming for a very small (think size of a pack
> of cigarettes) and very cheap ($35) Single Board Computer, which will be
> interfaced to watch the various gear position microswitches.  It also is
> taking the RS-232 serial data stream from my Dynon D10-A and my Garmin GNS
> 530W as inputs to set up the following test...
>
> *If* I am within, say, 3 miles of my GPS destination, *and*
> *if *I am going less than 120 knots (maximum gear extension speed), *and*
> *if *I am less than say, 300 feet AGL, *and*
> *if* my gear is NOT extended....* THEN*
> My wife Ali's voice will come over the intercom, loud and clear, saying "*PUT
> YOUR GEAR DOWN, STUPID!  YOU'RE ABOUT TO CRASH!!*!"
>
> What dya all think?  Pretty cool if I can get it to work!
>
> I'm using a SBC called a Raspberry Pi... it's got a 700 mhz processor, 512
> MB of onboard RAM, two USB ports, audio and HDMI outputs, an onboard
> ethernet port, and an onboard SDRAM slot.... all for $35 (!).  I've got the
> interface electronics worked out (buffers, voltage shifters, a MUX for the
> two RS-232 serial data streams, etc.), and I'm working on the programming.
>
> Obviously, this is pretty much a "one of" implementation, since it's
> dependant on my Dynon and Garmin panel.  If it all works as planned,
> though, it should be just a SMOP (Simple Matter Of Programming) to adopt it
> to other panels.
>
> Any thoughts out there?  What else could I use it for, like other warning
> systems?
>
> Dave
>
> Dave T. Nelson
> T/L 553-4327, Voice 507-253-4327, Fax 507-253-3648
> Program Director, ISC ECAT NPI & Test Engineering
>
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-- 
Mike W.
1997 Velocity Elite RG
Franklin /IVO Electric CS
Dual GRT EFIS HX Synthetic Vision
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