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Last Updated on: Thursday, April 07, 2016 02:04 PM

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Hour Meter Circuits


AC Current Controls Hour Meter  -  Many systems require routine maintenance based on machine operation time.  The circuit below is a simple way to turn on a hour meter whenever AC power is supplied to the machine.  An inexpensive snap-on current transformer from Magnetics Inc, is used to . . . [Circuit by David A. Johnson P.E.,  02/13/10]


CT Hour Meter  -  Many systems require routine maintenance based on machine operation time.  The circuit below is a simple way to turn on a hour meter whenever AC power is supplied to the machine.  An inexpensive snap-on current transformer from Magnetics Inc, is used to . . . [Hobby Circuit designed by David Johnson P.E.,  02/13/10]


Hour Meter triggered by Machine Vibration  -  This hobby circuit allows an off-the-shelf battery powered digital hour meter to be turned on and off, according to a machine's operation, without requiring a direct electrical connection to the machine . . . [Hobby Circuit designed by David Johnson P.E.,  01/01/98]

Machine Vibration Triggers Hour Meter  -  This circuit allows an off-the-shelf battery powered digital hour meter to be turned on and off, according to a machine's operation, without requiring a direct electrical connection to the machine. Machine vibrations are detected by an off-the-shelf piezo . . . [Circuit by David A. Johnson P.E.,  01/01/98]


Hour Meter Circuits

Master Category List - Dave's Circuits


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