Simple NiCad Charger (CB26201E)

This battery charger was found in the Electronics Experimenter Special Projects of 1983. The circuit uses an SCR as the control element.

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Powerful Fire Siren (CB17503E)
This circuit was found in a 1986 publication. However, it can still be easily assembled, as the...
Debouncer 4093 (CB11565E)
In the figure we have an anti-ring circuit with 4093. The duration of the pulse is given by R1 and...
4 5 MHz Oscillator (CB18284E)
This circuit was originally indicated to generate audio signal for analog TV sound. The circuit is from...