Thanks for the detailed explanation! Though it makes me wonder why GPIO11 is on the breakout header at all. It doesn't seem usable by end users.

@ccs-hello said in PWM board related: OP is talking about driving motor(s), not LED Yes. Please notice only OP wants to connect a motor to the PWM Expansion - not me. (sink 25 mA max per channel.) 400 mA in all! It's not bad for this degraded "signalling-only" board. What motor can be driven only using 25 mA? Who knows? I'd be curious too. See also the first paragraph of PWM Expansion Back EMF, stall current, etc.??? Motor driver board is the way. flywheel diode, snubber, no-load current, ... A logic level n-channel MOSFET (or an NPN transistor) and a 1N400x diode are not enough - all we need is motor driver board!

I know. I copy and change file libonionpwmexp.so from i2c-exp-driver/lib to /usr/lib/. And dont forget reboot.

here is a basic idea on how i would like it to operate. I will make the actual models on the weekend. Its basically like your board, the only difference is the daisy chain, and the there is only 1 power input. The omega will receive power from the servo board.

@Leif-Bloomquist thanks for the project write-up. it looks very simple yet effective. i also have a leap motion device and would love to put it to use as it has been in a box for over a year now. looking to read the code you have this weekend. good luck on continuing with the vehicle. looks fun. may have to do something similar with a omega on a arduino dock.

@Jeff-Verive You can use the subprocess module: https://docs.python.org/2/library/subprocess.html

@Kit-Bishop Yeah, I remember writing that part. I went back and double-checked that there wasn't an extra rounding (missing cast to float) that might have been eating up some of the precision. But the code looks clean