This power charger was found in a 1990s issue of Popular Electronics. Integrated circuits must be equipped with a heat sink.
Found in a 90s 73 magazine, this circuit uses an unusual component today which is the XR2206. |...
An audio amplifier of good power, and great sensitivity; a simple tuning step and a detecting...
This automotive circuit was found in the June 1997 issue of Electronis now magazine. The circuit uses...