i all !
i have this board [
www.banggood.com] for driving my 2500mw laser diode, but i can't get good ttl output from it.
I'm send signal fro arduino to the ttl + node (and if i test the arduino send 0 to 5 volt ok to this) but with 12v on this board in input, the outpu can only varry from 10.3v to 10.7v (0v in from arduino give : 10.3v and 5v give 10.7).
Can't understand why. i waiting that output voltage varry from 0 to almost 10/12v.....
Any one cane help me to resolve this or know this type of board ?
Thank's