We've moved to
NEW: Building Blocks
Each week a new circuit—ready to use in your own project, and with the magic explained!
The Opto-Theremin (NEW)
Logic gate oscillators
Precision multi-range thermometer
Opamp oscillator shoot-out
EAGLE library for operational transconductance and Norton amplifiers
All of the stuff is copyright © David H. Christensen.
All stuff is open hardware unless otherwise specified. Much love!