This circuit was found in an Electronics World of 1968. The transistor can be any general purpose and the double T must be set to R3 for the desired effect.
Suggested by National Semiconductor in documentation from the 90s, this circuit uses a switched...
This circuit drives two-color LEDs at a speed that is set in the 100k pot. The circuit can be...
Found in old American documentation, this circuit is intended for the control of heating elements. The...