RC-USB Joystick Files
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Mar 01, 2008
, 05:25 PM
United States, MI, Traverse City
Joined Nov 2004
I have M&M's RC-USB8ch programmed and built up on a breadboard, but I am having a problem. It was recognized when plugged into the USB port OK but the LED did not stay on and there was no stick response when testing it in the Windows Control Panel. This was with my Futaba 6EXA (in PPM mode). I re-checked the signal-in circuit several times, etc.
Then I tried my old (and gold) Futaba FG Series FP-T6FG and it worked! Hooking up a scope to the base of Q1 shows the expected pulse pattern at about .4v for both transmitters. Six channels for the 6EXA and actually 8 on the FG. Apparently it was made as an 8 but only 6 were made functional. I have attached pics of both.
So, any ideas why the 6EXA doesn't work?
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Futaba 6EXA 6 channel waveform
Futaba FP-T6FG 8 channel waveform