Laser control via 7i76e - PPI / PPMM / PWM

Yes mesaflash lists DB-25 pins and GPIO bits, not header pins.

I need to add the DB25 pins (in addition to the header pins) in the 7I76E manual

I think PWM is now functional on P1 expansion port, DB25 pin 5. Running the elizabeth-hurle.ngc file, there is gradient! Some areas are darker, some are lighter, and it resembles a face.

However, there's no true off state.

M67 E0 Q0

And

setp hm2_7i76e.0.gpio.025.out FALSE

both result in the laser still being on.

Is there an easy fix using the standard DB25 Bob? Maybe a scaling issue, or adding a resistor?

Setting the PWM value to 0 will make the output pin 0
I would verify levels after your BOB with a voltmeter

Correction... the elizabeth-hurle.ngc file I was using ended with M67 E0 Q0.1 which caused the laser to stay active. M67 E0 Q0 does in fact turn off the laser. Simple on/off means the laser is somewhat useful now! I'm pleased to say you've all helped me make progress!

Next on the to do list, the laser is active until LCNC tells it not to be... After that is adjusting the scaling. Oddly enough, all of the Q values in the elizabeth-hurle.ngc file were above scale. The gradient was only due to varied travel speeds. I honed in on that with a hand made 'gradient' file, and found the range in power is between ~ Q0.2 and ~Q0.5.

I'm sure I've seen threads addressing both concerns. Soon, I'll either post a synopsis of issues/solutions, or another question. Hopefully the former