I posted this photo a few days ago for people to try and guess what I was working on. Alas, nobody got it right.
Short answer: It’s a Dual Receiver Board.
We’ve had issues at some events where our 2.4GHz Spread Spectrum radios cause problems like interfering with WiFi setups, and we’ve been asked to limit where who go. Luckily, on my Futaba 10C I can quickly switch out it’s transmitter module to either be 2.4GHz FASST or old school 72MHz FM. So I devised this little board to allow me to have two receivers (FM and FASST) connect to Artoo at once, and flip between them with a flick of a switch.
I’ve had this idea for a while, but only now getting around to implementing it because Maker Faire is in a few weeks, and I know we’re going to have interference problems and I didn’t want to limit myself to either FM or 2.4GHz – or have to make a fiddly change in the field.
Receivers connect on the left and the real servos and speed controllers connect on the right along with receiver power. Ignore the black/red/white wire color on the cables coming out of the receivers. I’m only connecting to the signal out on pin 1 for each channel, and the only nice wire I had handy was standard servo cable. The last pair in the row adds power/ground and are tied to the select switch.
I’m also tinkering with some other droid controllers and this will allow me to have them connect without disrupting too many things, but more on that later.