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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2 transistor radio (CB22272E)
We found this circuit in an American documentation from the 60's. The transistors are made of...
Pink Noise Generator (CB17609E)
Unlike white noise, pink noise has a spectrum whose amplitude decreases with frequency. This...
1W Transmitter (CB4044E)
This transmitter for the 7 MHz range, as we can assume by the number of turns of the coil, since the...