Found in a RE Experimenter Handbook from the 90s, this circuit is intended for the use of LEDs in a flashing system for Christmas trees. The circuit can be expanded
This Kirlian machine circuit uses a car ignition coil. The circuit is from a Radio Electronics from May...
This circuit works both as a preamplifier and activates a relay when speaking in front of the...
This phase inverter with transistors, used in audio amplifiers, was found in a French publication from...