This circuit was found in a 1968s American. Transistors are of general purpose and the input is a rectangular signal of appropriate amplitude.
This circuit was found in a Popular Electronics from the 90's. The circuit can be used to convert...
This old circuit, from the 80's, uses an integrated circuit that is uncommon today. The circuit is...
This TTL oscillator was found at Popular Electronics in 1992. It provides both sinusoidal and...