Thermostat (CB6008E)

This circuit controls a heating element using a triac. Triac must be fitted with a heat sink. We find it in an American documentation from the 80s.

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Transistor Gain Meter (CB12279E)
With this circuit it is possible to compare the gain of transistors to obtain a matched pair (of...
Two Transistor MW Radio (CB12476E)
This simple MW radio does not need an external antenna to pick up local stations. It was found in a...
Emergency Light (CB14948E)
When there is no voltage in the power grid, the circuit causes a lamp to light. The circuit can be...