Hi all! I'm currently using a Teensy 3.5 to control 9 LEDs on an existing PCB in my car. The board is part of the dash electronics so I don't want to mess with it. To control the LEDs, I have to provide a ground for each one, since the PCB provides a 5.5v rail to each LED with a resistor, the catho…

Shift Registers - possible for ground switching?

450nick October 20, 2021, 3:34pm 10

Brilliant thanks Mark! Will take a read...

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