LED Driver

The LED driver board will take the 3.3V PWM signal from the Feather M0 and use it to control 12V power needed for the LED strips.  One board connected to a 12V 1A power supply is capable of pulsing the red channel of two 5-meter LED strips without the need for a heatsink.

The board itself is quite simple.  Check out the schematic below:

We put down a 1 Megaohm resistor for the pulldown resistor but later found 10Kohm works better!

Component layout

Place the components on the Perma-Proto board, solder, and trim any protruding leads.

led_strips_driver-board-parts-layout.jpg

Solder wire jumpers

Solder the necessary connections between components using solid core hookup/jumper wire. Check the image below to reference what connections need to be made:

The finished board should look something like this:

led_strips_driver-board-soldered-front.jpg

led_strips_driver-board-soldered-back.jpg

Label the terminal block

Label the terminal block to avoid incorrect connections. You can use a marker, paint, or the best of both worlds - a paint marker.

led_strips_mark-terminal-block.jpg

Since we're only using the red channel of the LED strips, each 12V LED Driver board will be able to power 2 x 5-meter strips. Build additional boards as needed …

This guide was first published on May 03, 2017. It was last updated on May 03, 2017. This page (LED Driver) was last updated on Sep 21, 2019.