Found in a publication from the 50's, this circuit uses a germanium transistor of the time. The power supply is simple.
We found this circuit in the 1977 RCA Solid State ICs. The circuit consists of a current amplifier with...
Using a 4001 and a high impedance transducer this circuit generates 40 kHz sound signals set to...
This circuit was found in February 1976, Radio Electronics magazine. The circuit is powered by 12 V...