This circuit generates frequencies determined by R3 and C1. We found it in the Radio Electronics magazine of May 1988. The power supply must be symmetrical.
This two-transistor amplifier has good gain but delivers a fraction of a watt of power. The...
Found in a 90s Elektor, this mixer makes use of integrated circuits of the time. The supply must be...
This circuit produces low power flashes in a LED. Frequency is adjusted by P1 and depends also on...