Micro metronome (CB20743E)

This simple CMOS metronome circuit can be mounted in a small box, providing both sound and light sources.

Synchronized automatic switch (CB9260E)
This control circuit up to 1 kW was found in a 1967 RCA documentation. The components are from...
560 kHz to 1 MHz VCO (CB21499E)
This circuit was obtained from an Electronic Design from 1964. Transistors admit modern...
Up to 500 kHz Pulse Generator (CB13452E)
This circuit was found in an old documentation and can be implemented with BC549 transistors. The...