This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
With a touch of S1 this circuit keeps a small strand of nichrome warm enough to light a cigarette....
This control for a heating element was found in an old documentation. The current in the element...
This circuit appears elsewhere in this section, but taken from other sources. This is an English...