Hello, My Arduino board is Uno. I want to drive 650nm and 405nm pigtailed laser diodes. I don't want to use PWM, so I choose a digital potentiometer MCP4161 10k ohm. But the current is not high enough to drive laser diodes, so I searched from the forum and found that I can use a transistor like…

Use digital potentiometer and transistor to drive pigtailed laser diode

JoyceChiu August 24, 2016, 5:16am 5

There is one thing I forgot to say:
I need to modulate the power of laser diode.
Does DAC can do this? Or just write code to modulate?

Topic		Replies	Views
Controlling 3V laser with arduino Interfacing	41	24173	May 6, 2021
Switching a laser on/off from digital pin Interfacing	18	11921	May 6, 2021
Vcc can power device, but digital out pins can't? General Electronics	8	10766	May 6, 2021
Higher powered digital pot General Electronics	3	1337	May 6, 2021
PWM laser Interfacing	3	1834	May 6, 2021