Home > Circuit Blox > Comparator Switch
UPDATED:.19:34 23 August 2014
FUNCTION BLOCK
FUNCTION
Switches an output on when Vin rises above a reference voltage, set by VR1.


  • The input voltage is compared against the reference voltage set by the user via a variable resistor.

Supply Voltage (+V): 6 to 18 volts

CIRCUIT DETAILS
+V
Vin
0V
PCB LAYOUT

PCB size: 51mm x 25mm

Assembly Instructions

+V
Vout
0V

NOTES

  • This circuit uses an operational-amplifier IC
  • The output from the op-amp is buffered with a transistor meaning the output will be go low when Vin reaches a preset level
  • Shorting the SIL pins will add some hysterisis, creating a Schmitt trigger effect.

APPLICATIONS:

  • Sensing circuits
  • Signal detection
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