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An Alarm Power Supply With Battery Back-up - This Power Supply is
suitable for the Modular Burglar Alarm. However, it has other applications.
It is designed to provide an output of 12-volts, with a current of up to
1-amp. In the event of mains failure, the back-up battery takes over
automatically. When the mains is restored, the battery recharges....
[Circuit by Ron J.] |
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APC Back Pro UPS cable -
.(Circuit design added 03/08)
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APC Dumb UPS cable (simple) -
.(design added 03/08) |
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APC Smart UPS cable - This cable connects your PC to a Smart UPS
from APC. This will allow your PC to shutdown before the UPS is out of
power. At UPS side: - pin 1 is RX / Shutdown - pin 2 is TX / AC Fail - pin 9
is Ground At the PC end (female connector): pins 1,4 (DCD, DTR) and pins 7,8
(RTS, CTS) must be shorted.... |
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APC Smart UPS interface Port -
.(electronic schematic added
03/08) |
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Basic UPS - (electronic diagram added 6/03) |
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Build a UPS for USB devices - 11-Apr-02 Issue of EDN Portable systems
often include circuitry that derives power from an external source, such as USB. When
the system disconnects from the USB supply, a battery takes over and supplies current
via a dc/dc converter. A diode-OR connection (Figure 1] offers the easiest way to
ensure that the supply voltage doesn't sag during this switchover to the battery....
[Design Idea by Mark Cherry and Jean-Claude Ailloud, Maxim Integrated Products,
Sunnyvale, CA, and France] |
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Build a USB-based GPIB controller - 16-Dec-05 Issue of EDN
Roll-your-own USB-based instrumentation bus.... [Design Idea by Botjan Glazar, Marko
Jankovec, and Marko Topic, Laboratory of Semiconductor Devices, Ljubljana, Slovenia;
Edited by Brad Thompson and Fran Granville] |
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Fiskars PowerRite UPS Port -
.(electronic schematic added 03/08)
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HP PowerWise L600/L900/L1250 UPS interface -
.(Circuit design added 03/08)
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Invertomatic-Victron (IMV) UPS intelligent (serial communication) cable -
.(design added 03/08) |
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Liebert UPStation-GXT interface -
.(design added 03/08) |
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Minuteman UPS -
.(electronic schematic added 03/08) |
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MOSFET Circuit UPS Regulator's Output Current - 02/01/96 EDN-Design
Ideas....Use a current mirror and a power MOSFET to increase the output-current
capability of an IC-voltage regulator.
[Figure only] |
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PICREF-1: Uninterruptible Power Supply - Microchip Application Note
Published 28-Oct-05 (app note added 2/06) |
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PowerCom King UPS cable -
.(design added 03/08) |
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Simple UPS - This circuit is a simple form of the commercial UPS, the
circuit provides a constant regulated 5 Volt output and an unregulated 12 Volt supply.
In the event of electrical supply line failure the battery takes over, with no spikes
on the regulated supply.... [Circuit design by Andy Collison] |
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Small 12V UPS with U feedback - .... |
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Tripp-lite OmniPro 675 UPS -
.(electronic schematic added 03/08)
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Tripp-lite OmniPro-450 (675) PowerAlert Cable -
.(design added 03/08)
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Tripp-lite OmniPro-450 (675) WinNT Cable -
.(Circuit design added 03/08)
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Tripp-lite SmartPro Cable -
.(design added 03/08) |
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Uninterruptable Power Supply - This circuit is a simple form of the
commercial UPS, the circuit provides a constant regulated 5 Volt output and an
unregulated 12 Volt supply. In the event of electrical supply line failure the battery
takes over, with no spikes on the regulated supply....(electronic design added 6/07)
[Designed by Andy Collinson] |
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UPS YUNTO P Series (250/500/750/1250) -
.(design added 03/08) |
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