Circuit - Vibration Monitors Electronic Circuits Designed by David A. Johnson, P.E.

Circuits designed by David Johnson, P.E.
Last Updated on: Sunday, May 10, 2015 04:04 AM

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Vibration Monitors Circuits

Alarm-Piezo Device detects Motion - Using a piezo device, this circuit will activate a beeper whenever the circuit is moved. It could be used as an earthquake alarm . . . [Circuit by Dave Johnson P.E., 07/09/06]

Detect Motion with a Piezo Device - Using a piezoelectric device, this circuit will activate a beeper whenever the circuit is moved. It could be used as an earthquake alarm. . . . [Hobby Circuit designed by Dave Johnson P.E., 07/14/06]

Earthquake Alarm Circuit - Geophones are dandy motion sensors. They are metal cans containing a powerful magnet, suspended with springs inside a coil of wire. The magnet functions as a floating mass. The slightest vertical motion of the device causes the coil to move relative to . . . [Hobby Circuit designed by David A. Johnson P.E., 07/08/05]

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 Johnson P.E., 01/01/98]

Motion Alarm Using piezo Device - Using a piezo device, this circuit will activate a beeper whenever the circuit is moved. It could be used as an earthquake alarm . . . [Circuit by Dave Johnson P.E., 07/09/06]

Piezoelectric Device used for Motion Alarm - An inexpensive piezo wafer is used to detect vibration and when the vibration is sufficient a switch is activated . . . [Hobby Circuit designed by David Johnson P.E., 07/09/06]

Piezoelectric Vibration Sensor Activates Switch - An inexpensive piezo device is used as a motion sensing device for this motion alarm . . . [Circuit by Dave Johnson P.E., 07/09/06]

Switch activated by Piezo Vibration - An inexpensive piezo wafer is used to detect vibration and when the vibration is sufficient a switch is activated . . . [Hobby Circuit designed by David Johnson P.E., 07/09/06]

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