I am going to install an Analog RGB (non adressable) LED strip in my room and need to make a driver for it.
The LED strip specs are:
- 10 cm segment
- 12V @ 60mA max per segment
I would be using 330cm of the strip (33 segments => 2A max => 0.7A max per channel)
My initial thought was to use a microcontroller with 3 PWM channels for red, green and blue. But then I realized I could probably get away with using 3 variable resistance to provide variable voltage to the 3 channels and the color can then simply be changed by altering these resistors.
Would this way be okay ? After all PWM does the same thing … generate analog voltage levels from digital.
The only thing i can think of is that the variable resistors need to be able to handle that much current (vs PWM solution where a mosfet/bjt would take care of it).
Any thoughts ?