three-level touch control (CB7040E)

Found in Popular Electronics this circuit uses common components to control an incandescent lamp with three levels of intensity

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15 V and 1 000 V power source (CB20182E)
This multi-purpose power supply provides voltages of +15, -15, 300 and 1 000 V and is very useful on...
Electronic Drums (CB20444E)
The two damped oscillators shown can be adjusted to generate the drum sound when we touch the...
Shield for inductive loads using a triac (CB7051E)
This circuit was found in a Popular Electronics from the 80's. The circuit can be applied to any...