Manual Clock 7400 (CB22411E)

This circuit to produce clock pulses is manually driven. The circuit is TTL and must be powered by 5 V.

1 kHz high pass active filter (CB7576E)
Found in American documentation from the 90s, this circuit passes frequencies above 1 kHz. The...
10 meter range receiver (CB21948E)
Found in a documentation by Hugo Gernsback from 1960, this receiver uses germanium transistors of the time...
1 kHz oscillator 4001 (CB15514E)
The oscillator shown in the figure generates a 1 kHz tone that is reproduced on the speaker with...