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Circuits designed by David Johnson, P.E.

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Last Updated on:  06/17/2009 03:30:28 PM

Alarm Circuits     Current Monitors

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Pump Motor Monitor
This circuit can turn on a light or sound a beeper, whenever an AC line powered pump motor turns on.  It is designed to detect the motor current using a small inductor placed on the outside of the motor’s power cable.  No direct wire contact is needed.

Circuit Pump Motor Monitor designed by David Johnson, P.E. (Nov 18, 2004)

Alarm Circuits   Current Monitors
Master Schematic Category List - David A. Johnson, P.E.

 
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