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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Saturday, June 28, 2008 01:21 PM


Comparator Circuits    Indicator Circuits
Acceptable Voltage Indicator
I have used this circuit many times in custom test fixtures where a simple go-no go indication was needed.  The circuit can also be used to adjust a particular voltage be within specific high or low limits.  The three LEDs will indicate if the voltage is high, low or OK.  When connected to other converters, such as a frequency to voltage converter, a current to voltage converter or a power to voltage meter, it could provide a quick indication of a proper level.

Click on Drawing Below to view PDF version of Schematic

Acceptable Voltage Indicator designed by David Johnson, P.E.

Comparator Circuits    Indicator Circuits
Master Schematic Category List - David A. Johnson, P.E.
 

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