This circuit is from 2005 documentation. The integrated amplifier circuit must be mounted on a good heat sink and the speaker must be able to withstand the full power of the circuit.
This amplifier for automotive use is from the Philips Databook of 1990. The integrated circuit must...
This fast-acting circuit uses any phototransistor as a sensor. The circuit drives a 30 V relay, but...
With this 1-transistor circuit we have a high input impedance and good gain. The circuit is from a...