Custom Lights Controller See Forum Post Electrical connections Any GND pin on the arduino is connectied to one side of both buttons. The other side of Button 1 (Dimmer) is connected to Pin 2. The other side of Button 2 (Brighter) is connected to Pin 3. Libraries used mheironimus/Joystick nawotech/Button Parts used Arduino Pro Micro (here) Silicone Wire (here) Two Momentary Buttons Enclosure USB Cable