Suggested by General Electric in 1965 documentation, this circuit controls the current at a load from half to maximum power. The circuit is for loads up to 900 W with the indicated components.
The load used in this experimental circuit is a small incandescent lamp but it can be replaced by...
Found in an American documentation from 1968, this circuit senses the temperature through an...
Today we have more compact solutions. This is from a Radio Electronics magazine from October 1990....