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Battery Backup
Circuits
Last Updated on:
Friday, March 12, 2010 12:07 PM |
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Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:
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Battery Backup Converter uses One NiCd Cell - 02/03/97 EDN-Design Ideas: Notebook
computers and or portable equipment often use a backup battery to retain memory
contents during replacement of main battery. Such "bridge batteries" usually consist
of five or six series-connected NiCd coin cells. They're expected to keep system
alive for approximately 5 minutes—plenty of time to swap batteries.....(design idea
added 6/06) |
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Buck Converter Handles Battery Backup System - 04/24/03 EDN-Design Ideas: A
synchronous buck converter is inherently bidirectional. That is, it transfers energy
from input to output as a buck regulator when the output voltage is low, but, when the
output voltage is high, the converter acts as a boost regulator, transferring power
from output to input. This Design Idea shows how to use this bidirectional energy
transfer to automatically recharge a battery when the mai..... / (schematic / circuit
added 11/03) |
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Emergency Lighting Systems & Battery Powered Fluorescent Lighting - Zetec
Semiconductors Applications Notes An overview of the principles behind typical
emergency lighting systems, fluorescent tube behaviour, and the requirements of the
transistors for efficient voltage inversion. The note also includes two "Royer" based
designs for low voltage systems. (app note added 2/06) |
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Emergency Power - This unit was constructed in a plastic 4-outlet juction box ($5
from Home Depot). The front panel is cut from 60-thou Lexan, and a scrapped Pep-Boys
battery charger provided the transformer. The PIC16F870 keeps track of battery
voltage as well as both charging and discharging currents. ….(design added 08/08) |
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Memory Supply Includes Battery Backup - 02/03/97 EDN-Design Ideas: (design idea
added 6/06) |
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MicroController Provides SrAM Battery Backup - 06/26/03 EDN-Design Ideas: To
maintain content in the event of power loss, many designs that include SRAM require a
dedicated device that can automatically switch from a standard power supply to battery
operation. Microcontrollers.....(design idea added 1/05) |
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