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.
In the figure we have a current source whose intensity is given by the formula next to the...
This circuit amplifies signals from 0.5 Hz to 300 kHz. We found it in an old documentation. Equivalent...
The circuit we show is a water pump actuator that, in addition to being automatic, has a water...