This circuit was found in a Popular Electronics from the 90s. The circuit has temperature compensation. Coil and capacitors depend on the frequency at which the circuit will be used.
This circuit was obtained in an Electronic Engineering of the 90s. The operational amplifiers and...
This circuit is from a 1966 General Electric documentation. The circuit applies to sensitive SCRs for...
This unijunction transistor oscillator is intended for Morse code practice. The circuit is from an...