This circuit was obtained from Radio Electronics magazine, October 1987. The circuit uses a triac to control the heating element current. The transistors are general purpose.
This is the project we have described, as found in a 1981 documentation. In the figure we show the...
I found This circuit is in a documentation of transistors from 1958. It uses germanium PNP...
This is another of the many circuits we have with the 8038. The circuit is from the Radio...