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.
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...
The gain for this circuit is given by the ratio between R2 and R1. The circuit is suggested by...
Only for reference this is a circuito f a commercial receiver of the year 1958. The circuit uses...