AC Line Voltage and Current Monitor - A simple and low cost line monitor that is fusible and switched, for use in repair and experimentation (especially useful in conjunction with a Variac). This page also details one way I go about making project enclosures.
Guitar Pickup Switcher - Allows you to connect 3 pickups in any possible configuration. I finished designing it, got all the parts, but never ended up making it. If you have any interest in making this, let me know, I would be interested to see (and hear) how it turns out.