Overvoltage Protection Circuit Circuit

  
When testing a circuit, a source of voltage that is variable and has overvoltage shutdown is veiy useful. In this circuit, Rl is adjusted to 1 to 2 V below the eventual shutdown threshold. R2 sets the trip voltage. When this voltage is reached, the circuit shuts the voltage to the circuit under test down.
Overvoltage Protection Circuit Circuit - schematic

To reset, reduce Rl belowtrip threshold and depress reset switch SI.




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