Voltage will vary w/ duty cycle.. Need to be at 100%
Anything other than 5V @ 100% (or close) means they may have changed specs..though 3.3V or 5V is really the only normal options
for voltages at the gate pin.
Most meters average so you'd normally see like 2.5V @ 50 % duty cycle but it's really 5v..
you need to measure voltage at 100% on.
For the double channel up the gauge of your wire.. May be getting some voltage drop.
I prob. wouldn't desolder, just lop it off at the tc-420 and splice it in..
going to ruin your nice wiring job though..
sorry, It's not making much sense in my book atm..
you could check the current of the gate wire as well should be 40mA or so.
check at the driver board.
OPP's varies by load on the Ldd.. May not help..
2.) The current draw for the PWM pin is 5ma @ 100% on average. Because of this, I would not recommend driving more than 6 LDD's per arduino pin. 40ma is the maximum per I/O pin according to the folks at Arduino CC.
Most Aduino like setups like this "should" be able to handle multiple Ldd's w/ ease..
Not sure I'd run the PWM wires under the power supply though...Maybe EMF..
hmm 421....not sure if it's slightly designed different (well besides the wireless) or not..