This circuit controls a heating element using a triac. Triac must be fitted with a heat sink. We find it in an American documentation from the 80s.
The circuit shown in figure uses a photodiode as a sensor element and its main feature is to have...
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...
The transmitter we have described, operates at a frequency between 88 and 98 MHz, with a range of the...