Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to original material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches



Power Failure Alarms
Power Supplies -- Main Page
 

Last Updated: November 30, 2017 07:40 AM

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 806-368-7747


Links to electronic circuits, electronic schematics, 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 __ Circuit 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


HOME Schematics Index Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy


Copyright  January, 1998 - November, 2017     David A. Johnson & Associates.  All Rights reserved. 


 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.