Found in 90s Popular Electronics, this circuit fires a load through a MOSFET from an audio signal applied to the input. Power supply is done according to the load.
This TTL circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit has...
We found this circuit in Sperimentare magazine number 4 of 1977. The magazine no longer exists, but...
This crystal configuration can be made with triggers of any logic. The frequency is given by the...