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.
We found this circuit in an 80s Intersil documentation. Modern equivalent operating systems can be...
Although the system is experimental and should not be adopted by the arrival of digital radio, for those...
This circuit with the LM741 operational amplifier can be applied to other operational amplifiers. We...