Found in Popular Electronics from the 90s, this circuit generates signals in a frequency range set to R7 and basically determined by C1. Operational and equivalent transistors can be used.
This circuit for high impedance microphones has a low impedance output. The circuit is from a...
August 2017 - Mouser Electronics is supplying the Microchip DSC000 MEMS series oscillators for...
This small two-transistor AM radio was sold in the 1960s in Japan. The circuit was powered by two...