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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.

x   UPS

Schematic for a battery backup power supply for a computer.
BYTE Aug 1980 (v.5#8) pg. 242

Two accessories for the Sinclair/Timex computer. 1. Battery power to make the computer "portable" or as a back-up power supply. 2. Reset button.
COMPUTERS & ELECTRONICS Aug 1983 (v.21#8) pg. 22

A simple battery-powered backup circuit that produces a regulated "glitch-free" 5-volt DC output from an 8.4-volt Ni-Cad.
CQ. THE RADIO AMATEUR'S JOURNAL Jul 1995 (v.51#7) pg. 90

Protect your memory against power failure. Use a bank of rechargeable batteries to keep 5 volt power coming to memory even if the power fails. A trickle charger keeps the batteries always ready.

Battery backup system. If power fails, the electronic device is automatically switched over to battery power.
MODERN ELECTRONICS [1] Feb 1978 (v.1#1) pg. 73

Is your CB station ready for an emergency? Procedures to follow in an emergency. Circuit for a standby 12-volt emergency power system built around an auto battery and trickle battery charger.
POPULAR ELECTRONICS [1] Mar 1976 (v.9#3) pg. 95

Low-power DC uninterruptible power supply (UPS) design and construction.
POPULAR ELECTRONICS [2] Oct 1997 (v.14#10) pg. 39

Zap-proof your home. Suggestions on installing surge protectors and power back-up systems for a house.
POPULAR HOME AUTOMATION Jan 1998 (v.2#6) pg. 18

Tips on making your computer's memory non-volatile by adding battery backup.
RADIO-ELECTRONICS Aug 1984 (v.55#8) pg. 12 (ComputerDigest)

Easy-to-build power inverter allows AC devices to be operated from a 12-volt DC battery. Equip it to "kick in" automatically for use during a power failure and you have an uninterruptable power supply.
RADIO-ELECTRONICS Mar 1985 (v.56#3) pg. 43
Correction RADIO-ELECTRONICS Jun 1985 (v.56#6) pg. 20

Backing up rectified AC power supplies with batteries.
RADIO-ELECTRONICS Mar 1985 (v.56#3) pg. 80

A battery backup for CMOS-based circuits.
RADIO-ELECTRONICS Apr 1987 (v.58#4) pg. 79

Uninterruptable power supply (UPS) can supply 40 watts continuously at 115 volts with a frequency of 60 Hz. Power is supplied by a 12-volt automotive or motorcycle battery.
RADIO-ELECTRONICS Jan 1988 (v.59#1) pg. 45, 69

Simple battery backup can be used to power a control circuit for an alarm system.
RADIO-ELECTRONICS Dec 1990 (v.61#12) pg. 8