Here's what we'll need:
- (Real) Bass drum pedal
- an audio cord with a mono 1/8" plug
- a reed switch/relay
- small magnet(s)
There are quite a few projects like this around the web, but I wanted to capture what worked well for me.
Step 1: Buying a decent pedal
I stalked the auctions for a couple weeks and got this barely used Mapex pedal for about $35 (it retails for over twice that).
I definitely recommend a pedal that has floor spurs (if you play Rock Band on carpet), since this pedal won't connect to your plastic set like the original.
Step 2: Planning the trigger
I decided it was much simpler all around to mount the trigger under the pedal (similar to the Rock Band design).