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.
The UM3562 integrated circuit is a dedicated circuit found in many toys because it generates three types...
This circuit keeps a flashing LED when a balcony lamp, for example, is turned off. As a result,...
This circuit is from an 80's publication. It makes use of small 6 V x 50 mA incandescent lamps....