This 9 V battery eliminator was found in Radio Electronics magazine from June 1966. The transistor is of medium power and must be equipped with a small heat sink.
This circuits shows how to use in operational amplifier as a basic voltmeter. Power supply must be...
The coils determine the frequency of this oscillator that we found in the January 1996 issue of...
This circuit was found in a National Semiconductor Handbook from the 1990s. The integrated circuit...