When the voltage in the circuit exceeds the value set in the trimpot, the LED goes off and, if a low current buzzer is used, it rings. The circuit is from American documentation from 1999.
Found in American documentation from the 1960s, this circuit employs power transistors of the...
This circuit uses a thermistor or NTC as a temperature sensor and provides the indication on an...
This is a dimmer version for incandescent lamps (do not use any other type) from an old...