How to control 100 High Power COB LEDs?

Thread Starter


Joined Mar 20, 2021
Hi there,

I am pretty new to electronics but really want build a system that can control 100 high power LEDs for a photography project. I need to be able to programme them to turn on / flash individually and also in rows.

I have been playing around with the TLC5940 16 channel LED Driver but am struggling to find a similar driver that has multiple channels, an I2C function and that can give each LED up to 700mA with 350mA nominal.

I was wondering if anyone knows of a relevant LED driver and if anyone has any pointers to set me off in the right direction with this project?

Any help would be very much appreciated!


Joined Apr 11, 2010
With that many individual LEDs, you are better off breaking the problem down into smaller bits. You can control 100 LEDs with a 10x10 matrix. Then, you specify row and column to turn on one LED. And you turn on each LED quickly so it looks like you’re setting them all at once.