Re: Adafruit 16-Channel 12-bit PWM/Servo Driver not driving servos
I was all excited to try moving the LED to a higher port this evening. Unfortunately I didn't get the results I had hoped for. I moved the LED to port 14. Unfortunately as soon as I plug in the power to the arduino it lights. (Not when I plug in the V+ power mind you... nothing lights when I do that... but when I plug in the arduino it lights and stays lit until I unplug the arduino.) I see no change in the brightness of the LED even after the sketch cycles through port 14.
However, if I unplug the 5v pin (VCC) from the Uno 5v port the power LED goes off on the PWM board but the LED on port 14 stays lit.
If I unplug the V+ power the LED dims out slowly (I assume residual power draining from the caps in the power supply.)
I have video if you want to see it. Is it allowed to post video on this forum?
So, am I understanding this right? There is no signal on the PWM pin so the pull-down resistors are drawing the V+ current through the LED. Seeing the LED dim would be an indication that the signal went live on the PWM pin, right?
My Rpi SD card image seems to be corrupted so I need to rebuild that tonight before I can get the i2c tools on it.