Found in a 90s Radio Electronics, this circuit can supply currents of a few amps, according to the power transistor. The power transistor must be equipped with a heat sink.
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...
Found in a European magazine from the 90s, this circuit emits beeps that are several seconds apart to...