Found in a Popular Electronics from the 90s, this circuit applies to flashes with xenon lamps. The transistor admits equivalent and the phototransistor is of the Darlington type.
This circuit was found in an old American documentation. Its purpose is a proportional scanning signal...
This circuit emits a loud sound in a headset when the driver who wears it nods while being in a...
This amplifier stage was found in a 1956 Sylvania manual and has an unusual configuration with a...