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 Texas Instruments INA826S Instrumentation Amplifier Evaluation Module is available from Mouser...
This Star Trek red alert circuit was found in the July 1990 issue of Radio Electronics magazine. The...
This circuit for frequencies of 20 to 2 kHz was obtained in English documentation from 1966. The...