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 can be found in a 1970 Motorola documentation. The circuit can be implemented with general...
This circuit was found in RCA documentation from the 90s. It consists of a power control for a...
Found in a 303 Circuits from the 90's this circuit can use the lowest current range of a common...