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

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