This circuit appears at various points on this site and in this section and can be designed with almost any operational amplifier. This version is from an American documentation from 1975.
This circuit was obtained from a 1978 Practical Wireless. It makes a speaker emit sound when there...
This circuit was found in an English magazine from 1983, but it can be assembled with BC548. The...
With its high power and high performance, this power amplifier is ideal for high quality sound...