This circuit was obtained in a Motorola documentation from 1968. The circuit uses a power transistor of the time. Modern equivalents according to the load current and voltage can be used.
With this circuit you can produce the sound effect passing from one channel to another. The...
The sensors in this circuit are NTCs and PTCs that work in a differential way by directly...
This basic configuration can be found in a lot of articles on this site. In this case, the relay...