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.
We found this circuit in a 1975 filter cookbook. The circuit can use other operational amplifiers and...
The purpose of this circuit found in a Popular Electronics from 1972 is to intensify certain...
This circuit was found in a 1964 magazine, which no longer exists. It is a small wireless...