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.
This isolated shield is from an old documentation, making use of an operational one of the time. It...
This circuit can be used with receivers to attenuate signals that may cause interference. The...
In this circuit of an American documentation of the 90s, when the light is cut, we have the...