I have a transistor switch circuit driving an LED light array with PWM that is working great with my 5v Arduino, and I'm not sure how to modify it to work properly with my Teensy 3.0, which is 3.3v.
The circuit is like this: collector ----> gnd of LED array ---> LED array ---> 12V / PWM output ---------> 1k? resistor ----> TIP29C base \ emitter ----> gnd
What value of resistor would make this circuit work as a switch with a 3.3v PWM output? It's been a couple of years since I've done these calculations...
Thanks to anyone that can help!