We found this sensitive high input impedance voltage amplifier in the November 1970 Radio Electronics magazine. The circuit is powered by 18 V power source.
Found in Popular Electronics from the 90s, this circuit can be used in tachometers. The integrated...
I found this circuit in an old English magazine from 1981, but it can still be assembled with some...
This circuit was suggested by the 101 Electronics Circuits of 1979, but it is still current if we...