Step 1: Parts Needed
- 12VDC/125VAC 10A SPDT Mini Relay (275-248)
- 1000 microfarad 35V 20% Radial-lead Electrolytic Capacitor (272-1032)
- 10K ohm 1/2W 5% Carbon Film Resistor pk/5 (271-1126)
- Project Enclosure - 4x2x1" (270-1802)
In addition, you'll need a garage door opener. I used a Chamberlain Universal Garage Door Opener that I found at Lowes.
For a nice, clean installation, I'd pick up some 18g hook-up wire, heat shrink tubing, and some wire-tap-in's. You'll also need a soldering iron and solder for making the connections.