This circuit applies to any common operational, the time constant for the given values being 22 ms. The circuit must be powered by a symmetrical source.
Found in a 1968 Mullard manual, this circuit can function as an infrared audio link. The...
This very low frequency oscillator was found in a Popular Electronics from the 90s. The circuit...
This very old circuit, from a publication from the 1970s, uses a germanium transistor and two...