Building A GA Transponder

[No Longer Active]

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!

[Geremy Britton]

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?

[No Longer Active]

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!

[Jylhami]

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

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

Keep up the progress

[No Longer Active]

but i am sure the frequency is Mhz and Khz.

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!