Im looking for some expert advice please..
Im building a laser harp using a Nano, scanner(galvo), 12bit DAC and a DPSS 200mW laser with TTL modulation...
The problem i am having is getting the laser to blank, i use a GND and a PWM pin for the TTL cable from the laser driver, no matter what i try i still get a line going through the animation..
If i wire the TTL and run the blink sketch on the Nano the laser will go on and off so i dont understand why it wont using the DAC..
Any help will be very grateful...