Suggested by Philips documentation from 1968, this circuit uses components from the era that can be replaced by modern equivalent types. The double transistor can be replaced by a matched pair.
This conventional source with transistors was found in a 1989 documentation. The transistors must...
The components used in this 80's circuit are uncommon today. The circuit is intended for...
This circuit produces the sound of a motorcycle or an outboard motor. The frequency is adjusted in the...