100 kHz Calibrator (CB5607E)

This circuit was obtained from Popular Electronics of the 1990s. The circuit uses common transistors today and the frequency is given by the crystal.

| Clique na imagem para ampliar |

Touch bistable 4011 (CB9566E)
This biestable touch circuit was found in American 1980s documentation. The circuit must not be...
Electronic Organ with Trembling (CB16275E)
This simple electronic toy organ produces an interesting sound, which can be used by the most...
Super Thermostat (CB16994E)
This circuit is from an old documentation from 1995, but it can be easily assembled today by the...