RGB LED Controller

This is a simple case to mount three potentiometers and enclose an Arduino Nano and a couple of JST XH 2-pin and 4-pin connectors. If you'd like to build and program the circuit I've displayed in the photos read on!

I was looking for a way to control the individual brightness of each channel of a single RGB LED, so I designed this control box around an Arduino Nano along with the code the Nano runs. It's quite a simple circuit using minimal components and could easily be expanded using three MOSFETS, one per channel (R/G/B), and a stronger power supply to control one or more RGB LED strips.

We'll only be using three inputs and three outputs for this project of the available 21 programmable pins on the Nano. In my code I've chosen to use A0-A2 for the inputs, and D9-D11 for the outputs. I've included two versions of the schematic to pick from depending on your requirements:

The first, as I built, powers the LED directly from the Arduino; this is only suitable for low-current use-case