These 6 to 12 V source with current up to 100 mA was found in Radio Electronics magazine from June 19666. The source has a current indicator and uses transistors of the time.
Found in American documentation from the 90's, this circuit consists of a solid state relay with...
In a voltage follower, the voltage gain is unitary, the input impedance is very high, and the...
Found in an English Maplin magazine in 1983, this circuit has an RIAA equalization. We suggest its...