Building A GA Transponder

On my bendix radios I have removed the need to use dual encoders, because unlike yourselves I am very limited to funds.

So instead of using dual encoders, I just use normal encoders with a single knob. My encoder costs £1 and the knob costs 30 pence! Compared to £15 for a dual encoder and £5 for a knob saving myself £37.40 per radio, and when you add all the radios up, there is a massive saving!

This is how I have wired mine up:

I have wired my single encoder to a toggle switch so when I have the toggle one way I am selecting GHz and when i flip the toggle the other way I am selecting MHz.....

How easy is that! and a massive saving!

Just add a standby button and your then your red digits and voila!.....your done!

Again this is a great money saving trick, I haven't got a lot of money at all, and I believe in simplicity and saving £££'s, and this way I am very very happy!

http://alexpilot.50g.com/radiodiagram.jpg

Alex, looks great... and an excellent budget idea.
Are you planning on getting some LED digits in there or just using a screen to display that information?

Hi Gez, I am indeed using digits, would hope to have the opencockpits master card and displays card by december, so just a little bit of tweeking with sioc and it should be pretty much functioning, I will have the whole radio stack finnished by this time next week, its coming along nicely!

Cheers Gez!

Quote:

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Originally Posted by Alex Jay

I am selecting GHz and when i flip the toggle the other way I am selecting MHz.....

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Nice work and ideas from you guys, but i am sure the frequency is Mhz and Khz.

Keep up the progress :-D

Quote:

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but i am sure the frequency is Mhz and Khz.

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You are indeed right there, that diagram was just drawn from the top my head just to show the idea, of my course my legends are correct! I can assure you of that lol!

Well spotted though!