These are smaller projects that we have built for internal use and have chosen to open-source.
12V Lighting Controller
Description: A 4-channel controller for anything that needs +12V switched at up to 3A per channel. Uses the "RBBB" arduino design for control, and an LMD18400 4-channel high-side automotive switch from TI. All 4 channels are PWM and the there are 2 interrupt and 2 analog/digital inputs with protection circuitry. Use this for "common cathode" LED strips or other loads where +12V needs to be switched on the high side.
Two of the inputs are interrupt-driven and 2 have analog capability, so this could be used as a 1-door sub-controller for home automation using a port of the "Open Access Control" or as a converter/interface to another system.
- Includes Eagle CAD Schematic and Board Files, BOM, instructions.
- Bill of Materials included as attributes in drawing
- PCB also available from 
- Arduino 1.x program for vehicle/mood lighting with timeout, other logic.