Temperature control (CB10167E)

This circuit controls a direct current heating element. Power transistors must be load dependent. The components support modern equivalents.

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Simple low frequency receiver (CB9145E)
This circuit was found in a 90s Popular Electronics. The circuit uses components from that time,...
Adjustable diode (CB24175E)
This circuit simulates a diode whose characteristics can be adjusted with a trimpot. The circuit is...
Synchronized AC Switch with Triac (CB25870E)
This circuit is a modification of the previous one, also found in the July 1995 Electronics Now...