Triplicator for ionization chamber (CB21200E)

Found in Electronics Now, this circuit generates high voltage to charge a capacitor in an ionization chamber.

Vibrato (CB23942E)
This sound effect circuit was obtained from an article in the April 1969 issue of Radio...
Robot Eyes (CB12397E)
Found in a 1990 Electronics Handbook, this circuit causes an LED to flash when the phototransistor receives...
Sound Effects (CB26015E)
Found in the May 1997 issue of Electronics Now, this circuit produces a variety of sound effects for...