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Power Failure Alarms
Power Supplies -- Main Page
 

Last Updated: November 22, 2021 02:41 PM

Circuits Designed by Dave Johnson, P.E. :
MACHINE POWER LOSS BEEPER - For some medical equipment it is important for an operator when power is lost to the machine.  The beeper is powered from a 9v battery and requires the machine to have a power switch with a third set of contacts. . . Circuit by David A. Johnson P.E.-May, 2005

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-778-8407


Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:

12 Volt Alarm Power Supply-  A 12 Volt power suppiled designed for Ron's Modular Burglar Alarm.  However, being a popular supply voltage this circuit will have many other uses as well. __ Designed by Andy Collison

Electrolytic capacitor-based data backup power solution for a 12V system with 5V to 36V input-  EDN Design Ideas:  11/30/2016  This module provide as hold-up power in e. g., embedded systems, and can also be combined with a buck-boost module for a robust power system suitable Design by LTC Design Note

MACHINE POWER LOSS BEEPER - For some medical equipment it is important for an operator when power is lost to the machine.  The beeper is powered from a 9v battery and requires the machine to have a power switch with a third set of contacts. . . Circuit by David A. Johnson P.E.-May, 2005 



Power Failure Alarms


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