2MHz astable (CB9102E)

This TTL circuit can be used as a shield. The frequency can be changed by changing the capacitors.

Mini FM Tuner (CB16267E)
This ultra-simple FM tuner can pick up local stations with good sound quality and was found in a...
Miller Oscillator (CB9649E)
This crystal-controlled 1000 kHz oscillator was found in 1980s American documentation. The...
Cascading the 4017 (CB25913E)
With this circuit any number of 4017 integrated circuits can be connected in series. The circuit is...