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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
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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.


Low power windmill uses a bicycle generator and a window fan propeller. Output is about 0.5 amps at 6.6 volts AC. This is used to charge a simple homemade lead acid storage battery. Battery output used to power a transistor radio.

Inexpensive 24-hour clock timer and a simple relay circuit can prevent battery damage from over charging.
CAMERA 35 Jul-Aug 1973 (v.17#6) pg. 39

Simple circuit for a controlled-current nicad battery charger. Will recharge batteries in 4 or 5 hours and can be left on without danger of overcharging.
CQ. THE RADIO AMATEUR'S JOURNAL Jan 1979 (v.35#1) pg. 49

Circuit for a charging circuit which will handle any 6 to 24-volt rechargeable battery. Est. cost: under $10.
CQ. THE RADIO AMATEUR'S JOURNAL Jan 1979 (v.35#1) pg. 102

Build the HT Ni-cader, a nicad battery charger which operates from either battery power or AC line.
CQ. THE RADIO AMATEUR'S JOURNAL Jan 1981 (v.37#1) pg. 46

A simple, inexpensive slow charger for charging the special battery used in the Yaesu FT-207R two-meter transceiver without the need to have the battery inside the unit. Thus, you can charge one battery while using another.
CQ. THE RADIO AMATEUR'S JOURNAL Sep 1981 (v.37#9) pg. 64

Lab quality power supply features preset and variable output. Use it to power or charge Handi-Talkies or as a well filtered d.c. power supply.
CQ. THE RADIO AMATEUR'S JOURNAL Nov 1981 (v.37#11) pg. 53

Modify the Icom IC-2A(T) radio battery pack so that it can be charged with a home-built wall charger or home-built 12-volt charging cord.
CQ. THE RADIO AMATEUR'S JOURNAL Dec 1981 (v.37#12) pg. 40

Build your own NiCd battery charger for use with 2 meter handheld radios (such as the ICOM 2AT).
CQ. THE RADIO AMATEUR'S JOURNAL Mar 1987 (v.43#3) pg. 64
Correction CQ. THE RADIO AMATEUR'S JOURNAL May 1987 (v.43#5) pg. 60

The handy-pack, a self-charging heavy duty battery pack for your handi-talkie will provide up to 3 days of power for field operations. The project consists of 7 individual 1.2 volt cells and a two-level charging circuit to allow normal charging and continuous trickle charging. The practical aspects of charging nickel-cadmium batteries are discussed.
CQ. THE RADIO AMATEUR'S JOURNAL Jul 1987 (v.43#7) pg. 20

Primer on Gel Cell batteries. How they work and how to put them to work. Includes schematics for several battery charger circuits.
CQ. THE RADIO AMATEUR'S JOURNAL Feb 1990 (v.46#2) pg. 44
Correction CQ. THE RADIO AMATEUR'S JOURNAL May 1990 (v.46#5) pg. 8

Battery charging and battery eliminator circuits.
CQ. THE RADIO AMATEUR'S JOURNAL Feb 1993 (v.49#2) pg. 60

A short primer on rechargeable batteries. Includes a schematic of the lithium-ion charging circuit.
CQ. THE RADIO AMATEUR'S JOURNAL Aug 1996 (v.52#8) pg. 40

How to keep an emergency back-up radio station battery charged. Battery is automatically disconnected from power supply unit when not in use and automatically charged when in use.
CQ. THE RADIO AMATEUR'S JOURNAL Jun 1997 (v.53#6) pg. 56
Added Info CQ. THE RADIO AMATEUR'S JOURNAL Sep 1997 (v.53#9) pg. 8

Tip on fully discharging NiCd batteries before recharging.
DARKROOM PHOTOGRAPHY Jan 1989 (v.11#1) pg. 8

Smart charger for Rayovac "Renewal" rechargeable alkaline batteries.

Charger for nickel-cadmium batteries.
ELECTRONICS ILLUSTRATED May 1964 (v.7#3) pg. 72

A low-cost 6 and 12 volt battery charger.
ELECTRONICS ILLUSTRATED Sep 1964 (v.7#5) pg. 42

Lightweight rechargeable battery power pack makes any 5-watt transceiver a "portable" with power from 1-1/2 to 8 hours on a single charge.
ELECTRONICS ILLUSTRATED May 1965 (v.8#3) pg. 65

Can you recharge any battery? A discussion of the mechanics and theory of recharging batteries.
ELECTRONICS ILLUSTRATED Jan 1966 (v.9#1) pg. 51

The low-down on low-cost chargers. Includes schematics for a 40-ma and a 17-ma dry cell recharger.
ELECTRONICS ILLUSTRATED Jan 1967 (v.10#1) pg. 74

A combination battery tester and battery charger. Use on AA, AAA, C, and D sizes of zinc-carbon, mercury, alkaline, and nickel-cadmium cells.
ELECTRONICS ILLUSTRATED Jul 1967 (v.10#4) pg. 83

Simple circuit to "float charge" a 12-volt battery (or to power a heavy load that operates intermittently, such as a ham radio transmitter) uses two 12-volt 1-amp light bulbs as current limiters.
ELECTRONICS NOW Sep 1995 (v.66#9) pg. 8

Tip on using ordinary light bulbs to limit current when charging a bank of batteries using a Variac and bridge rectifier.
ELECTRONICS NOW Jun 1997 (v.68#6) pg. 8

Build a solar-charge controller, a simple comparator circuit that connects a solar panel to a battery when it senses that the battery voltage is getting low. Includes information on using several 6-volt or 12-volt batteries as part of a solar-charged electrical system.
ELECTRONICS NOW Oct 1997 (v.68#10) pg. 59
Added Info ELECTRONICS NOW Jun 1998 (v.69#6) pg. 12

Circuit for a 12-volt battery charger. Uses a General Electric X3 silicon-controlled rectifier which will handle up to 13 amps.
ELECTRONICS WORLD Jan 1967 (v.77#1) pg. 79

Battery charger for the Bulova Accutron electric watch.
ELECTRONICS WORLD Dec 1968 (v.80#6) pg. 82

Rebuild an old battery charger using a silicon-controlled (SCR) circuit.
ELEMENTARY ELECTRONICS #763 Winter 1965 pg. 85

Recharging dry cells. How practical? How safe? How economical?
ELEMENTARY ELECTRONICS Sep-Oct 1966 (v.3#1) pg. 37

Extra life from dry cells can be achieved by periodic recharging using this simple charging circuit.
ELEMENTARY ELECTRONICS Nov-Dec 1974 (v.14#6) pg. 45

Supercharger. Build this wide range nicad battery charger with built-in automatic cut-off timer. Charge one to six cells from AA to D size. You control charging rate and time.
ELEMENTARY ELECTRONICS Sep-Oct 1975 (v.15#5) pg. 55

Build a charger for trickle charging nicad batteries. Charge 12 AA cells at one time. Est. cost: $8.
ELEMENTARY ELECTRONICS Mar-Apr 1977 (v.17#2) pg. 49

Economy NiCd battery charger. A convenient and safe way to charge both trickle and fast-charge nickel-cadmium batteries. LEDs show charging status. Charging current is variable from 2-mA to 150-mA, or from 4-mA to 300-mA. Est. cost: $20.
HANDS-ON ELECTRONICS Mar 1987 (v.4#3) pg. 65
Correction HANDS-ON ELECTRONICS Jun 1987 (v.4#6) pg. 4
Correction HANDS-ON ELECTRONICS Jul 1987 (v.4#7) pg. 4
Correction HANDS-ON ELECTRONICS Jan 1988 (v.5#1) pg. 14

NiCd's. How they work. Build a tiny (penny-sized) charging circuit which can be configured for any desired charge rate (current) and voltage.
HANDS-ON ELECTRONICS Jun 1987 (v.4#6) pg. 39

Battery charger circuit for NiCd batteries will provide a rapid charge for AA-size cells requiring a charge current of 150 mA.
HANDS-ON ELECTRONICS Aug 1987 (v.4#8) pg. 92

Car battery charger circuit will quickly charge gelled lead-acid batteries and then turn off at full charge.
HANDS-ON ELECTRONICS Nov 1987 (v.4#11) pg. 92

Battery charger circuit provides a heavy charge to depleted 12-volt auto batteries.
HANDS-ON ELECTRONICS Jan 1989 (v.6#1) pg. 26

Troubleshooting cordless appliances and battery chargers.
HANDY ANDY Mar 1981 (v.5#6) pg. 40

Build your own NiCad battery charger.
INDUSTRIAL PHOTOGRAPHY May 1981 (v.30#5) pg. 10

Auto battery charger delivers 12 amps at 6 or 12 volts.
MECHANIX ILLUSTRATED #452 Jan 1966 (v.62) pg. 102

A trickle charger for your car's battery. Est. cost: $9.
MECHANIX ILLUSTRATED #560 Jan 1975 (v.71) pg. 85

Tips on charging lead-acid cells.
MODEL AVIATION Dec 1990 (v.16#12) pg. 30

Circuit for a battery charger which will handle any 6 to 24 volt rechargeable battery. Est. cost: under $10.
MODERN ELECTRONICS [1] Feb 1978 (v.1#1) pg. 48

Circuit for a charger that can give an output of three to twelve volts with an amperage output of up to 15 amps. Est. cost: $20.
MODERN ELECTRONICS [1] Jul 1978 (v.1#5) pg. 6

Charge penlight and large drycell batteries with this charger. Unit can deliver up to 100 mA of charging current at 1.2 volts. Est. cost: $8.
MODERN ELECTRONICS [1] Jul 1978 (v.1#5) pg. 60

The Ni-Cd battery. Myths and mastery of nickel-cadmium rechargeable batteries are explored. Includes circuits for building a battery charger.
MODERN ELECTRONICS [2] Mar 1986 (v.3#3) pg. 28

Solar cell converter. Step up a low-voltage photovoltaic cell's output to power circuits from a 1.2-volt Ni-Cd battery. The solar cell keeps the Ni-Cd charged. A dc-to-dc converter steps up the output to power 5 to 15 volt circuits. Est. cost: $16.
MODERN ELECTRONICS [2] Aug 1986 (v.3#8) pg. 52
Correction MODERN ELECTRONICS [2] Oct 1986 (v.3#10) pg. 5

A programmable Ni-Cd recycler safely recharges and reconditions nickel-cadmium batteries. Handles up to ten cells of any capacity.
MODERN ELECTRONICS [2] Oct 1986 (v.3#10) pg. 26
Correction MODERN ELECTRONICS [2] Dec 1986 (v.3#12) pg. 5
Correction MODERN ELECTRONICS [2] Feb 1987 (v.4#2) pg. 92
Added Info MODERN ELECTRONICS [2] Mar 1987 (v.4#3) pg. 5

Battery charger controller ensures proper and safe charging of liquid-electrolyte lead-acid batteries. This controller is added to any non-automatic 12-volt battery charger.
MODERN ELECTRONICS [2] Nov 1987 (v.4#11) pg. 40
Correction MODERN ELECTRONICS [2] May 1988 (v.5#5) pg. 7

One-button digital timer. Accurately controls the time-on interval for recharging cells and batteries to prevent damage due to overcharging. The timer applies AC line power to a battery charger for a preselected period of time (8-, 10-, or 12-hours).
MODERN ELECTRONICS [2] Oct 1989 (v.6#10) pg. 42

Tip: Nicad batteries should be fully discharged in order to revitalize them. One method described.
MODERN PHOTOGRAPHY May 1979 (v.43#5) pg. 25

How to get the most out of your nicad batteries. Part 2. Revive "dead" nicads with this charger/condensor setup. Also tips on maintaining the cells.
MODERN PHOTOGRAPHY Feb 1981 (v.45#2) pg. 48

Charger for nicad batteries that operates off a car's cigarette lighter socket.
MODERN PHOTOGRAPHY Feb 1983 (v.47#2) pg. 158

How to correctly discharge and fully recharge nicad batteries to keep them operating at their best.
MODERN PHOTOGRAPHY Aug 1983 (v.47#8) pg. 130
Added Info MODERN PHOTOGRAPHY May 1985 (v.49#5) pg. 2

The care and feeding of rechargeable batteries. Includes tips on the correct way to fully discharge nicads. How to build your own lead-acid-cell recharger.
MODERN PHOTOGRAPHY Sep 1985 (v.49#9) pg. 108
Correction MODERN PHOTOGRAPHY Jan 1986 (v.50#1) pg. 9

Advice on safe recharging methods for nicads.
MODERN PHOTOGRAPHY Jun 1987 (v.51#6) pg. 7

Build your own photovoltaic battery-charge controller.
MOTHER EARTH NEWS #86 Mar-Apr 1984 pg. 98
Added Info MOTHER EARTH NEWS #89 Sep-Oct 1984 pg. 148

Build a Ni-Cad battery charger.
MOTHER EARTH NEWS #96 Nov-Dec 1985 pg. 50

Resuscitator for nickel-cadmium batteries up to 22 volts. Use this device to burn away internal shorts.
MOTHER EARTH NEWS #99 May-Jun 1986 pg. 44

Build a trickle charger for a car battery.
MOTHER EARTH NEWS #103 Jan-Feb 1987 pg. 97

Build a nickel-cadmiun (NiCad) battery charger that operates off of a 12-volt automobile electrical system. Plugs into cigarette lighter. Recharges four 1.5 volt batteries. Estimated cost: $10.
PHOTOGRAPHIC Jul 1980 (v.9#3) pg. 77

Build your own all-purpose nickel-cadmium charging system. It is fully adjustable and can be used with virtually any battery for either fast or slow charging, reguardless of voltage. Est. cost: $35.
PHOTOGRAPHIC Aug 1988 (v.17#4) pg. 60

Build a portable charger for nickel-cadmium batteries which operates from the electrical system of your car.
PHOTOGRAPHIC Sep 1988 (v.17#5) pg. 70

Tips on the proper procedure for charging NiCd-type batteries.
PHOTOMETHODS Sep 1986 (v.29#9) pg. 8

Charger judges how much charge a battery needs.
POPULAR ELECTRONICS [1] Mar 1964 (v.20#3) pg. 47

Dry cell battery charger will charge D, C, Z, and #7 cells, 6 and 12 volt batteries and 9 volt radio batteries.
POPULAR ELECTRONICS [1] Feb 1965 (v.22#2) pg. 69

Can dry cells be recharged? How to get twenty to thirty times more life out of batteries.
POPULAR ELECTRONICS [1] Jul 1967 (v.27#1) pg. 41

Build a combination battery charger and tester. Recharge dry cells up to 12 volts with this unit. Tester determines if the battery will accept a recharge.
POPULAR ELECTRONICS [1] Aug 1967 (v.27#2) pg. 33

Constant-current charger for nickel-cadmium cells.
POPULAR ELECTRONICS [1] Oct 1969 (v.31#4) pg. 33

Well-regulated charger handles any nickel-cadmium or alkaline AA, C or D cell.
POPULAR ELECTRONICS [1] Apr 1971 (v.34#4) pg. 53

A discussion of the rechargeable alkaline battery, a simple test circuit for checking when to charge these batteries and tips on charging.
POPULAR ELECTRONICS [1] Nov 1972 (v.2#5) pg. 104

Circuit for charging the 3.75 volt nickel-cadmium battery currently being offered by Edmund Scientific Co.
POPULAR ELECTRONICS [1] Jan 1973 (v.3#1) pg. 104

Versatile nickel-cadmium battery charger operates from 115-v AC or 12-v DC at a variety of charging rates. Est. cost: $15.
POPULAR ELECTRONICS [1] Oct 1974 (v.6#4) pg. 68
Correction POPULAR ELECTRONICS [1] Dec 1974 (v.6#6) pg. 7

Build the battery multi-charger. Handles between one and six carbon-zinc cells charging four different types simultaneously.
POPULAR ELECTRONICS [1] Feb 1976 (v.9#2) pg. 67

Build a sine-wave inverter. Boost 12 volts DC to 117 volts AC at 100 watts. Also used to recharge storage batteries. Est. cost: $70.
POPULAR ELECTRONICS [1] Jun 1976 (v.9#6) pg. 43

Build a state-of-the-art battery charge monitor. Determines the proper time to recharge nicad batteries.
POPULAR ELECTRONICS [1] Jun 1977 (v.11#6) pg. 88

NiCd Zapper. How to "zap" new life into dead nicad batteries. A properly applied high current can often clear a fault, making the cell useful again.
POPULAR ELECTRONICS [1] Jul 1977 (v.12#1) pg. 60
Added Info POPULAR ELECTRONICS [1] Oct 1978 (v.14#4) pg. 8
Added Info POPULAR ELECTRONICS [1] Feb 1979 (v.15#2) pg. 11

Universal charger for sealed rechargeable batteries. Versatile charger operates as a constant-current source and offers a choice of 12 charging currents (from 9 tp 550mA).
POPULAR ELECTRONICS [1] Jul 1979 (v.16#1) pg. 50

Simple low-cost battery charger keeps an automotive-type battery in peak shape.
POPULAR ELECTRONICS [1] Jan 1981 (v.19#1) pg. 66

Modify a lead-acid battery charger to charge two batteries at once.
POPULAR ELECTRONICS [1] Apr 1982 (v.20#4) pg. 76

Build a solar-powered battery charger to charge a nominal 9.6-volt battery (like those found in a radio-controlled model airplane).
POPULAR ELECTRONICS [1] Aug 1982 (v.20#8) pg. 55

Circuit is used to charge an auxiliary battery in your camper as you drive along the road.
POPULAR ELECTRONICS [2] May 1989 (v.6#5) pg. 26

Battery-charger circuits. (1) Low-to-medium current circuit for 12-volt lead-acid type batteries. (2) Universal circuit for lead-acid, nickel-cadmium and gel-cell batteries. (3) Voltage-level monitor circuit keeps tabs on battery during charging.
POPULAR ELECTRONICS [2] Jul 1989 (v.6#7) pg. 80

NiCd battery zapper circuit is a "last-resort" device to save a "dead" NiCd.
POPULAR ELECTRONICS [2] Nov 1989 (v.6#11) pg. 27

Trickle charger circuit for a lead acid battery.
POPULAR ELECTRONICS [2] Jun 1993 (v.10#6) pg. 76

Battery trickle charger circuit for lawn and garden equipment, motorcycles, etc.
POPULAR ELECTRONICS [2] Jun 1994 (v.11#6) pg. 25
Added Info POPULAR ELECTRONICS [2] Jun 1995 (v.12#6) pg. 30 (Adapting for car battery)
Added Info POPULAR ELECTRONICS [2] Jul 1995 (v.12#7) pg. 32

Build the "Smartcharger" to recharge the new alkaline battery called "Renewal" (AAA, AA, C, and D size).
POPULAR ELECTRONICS [2] Sep 1994 (v.11#9) pg. 64

Charge-It. A dual-regulated charger for NiCd and Gel-Cell batteries. Both charging current and voltage are variable.
POPULAR ELECTRONICS [2] Nov 1997 (v.14#11) pg. 46

Circuit to protect against overcharging lead-acid batteries.
POPULAR ELECTRONICS [2] Dec 1997 (v.14#12) pg. 62

Circuit to power transistor radios. Recharge 9-volt batteries or use 110-volt line.
POPULAR MECHANICS Sep 1963 (v.120#3) pg. 192

Rechargeable batteries and a recharger end battery problems.
POPULAR MECHANICS Jul 1964 (v.122#1) pg. 174

Quick or trickle battery charger.
POPULAR MECHANICS Nov 1964 (v.122#5) pg. 196

Four electronic kits for your car. A look at two tachometers, a windshield wiper delay and an inverter/battery charger.
POPULAR MECHANICS Jul 1973 (v.140#1) pg. 142

Battery "brain" tests batteries and recharges those that aren't too far gone. Handles batteries from AAA up to lantern size. Estimated cost: $15.
POPULAR MECHANICS Nov 1980 (v.154#5) pg. 20

Zap your NiCd batteries back to life with this battery rejuvenator. Repeated high-current surges will often clear up internal shorts and make cells usable again.
POPULAR MECHANICS Feb 1982 (v.157#2) pg. 62

Tip on rejuvenating Rayovac rechargeable batteries which have fallen below 1.0 volts so that they can again be recharged.
POPULAR MECHANICS Apr 1994 (v.171#4) pg. 12

Tips on recharging or "boosting" non-rechargeable batteries.
POPULAR PHOTOGRAPHY Sep 1977 (v.81#3) pg. 32

Superspeed recharger for nickel-cadmium cells. Charge a D-size cell in 20 to 60 minutes. Slower-speed trickle charger also built into unit.
POPULAR SCIENCE Oct 1967 (v.191#4) pg. 144

Build a battery charger that accelerates the charging time and shuts itself off to minimize the possibility of overcharging.
POPULAR SCIENCE Jul 1970 (v.197#1) pg. 101

Jelly battery charger. This electronic circuit is used between your regular car battery charger and the "gell cell" being charged.
RADIO CONTROL MODELS & ELECTRONICS Nov 1994 (v.37#11) pg. 29

LED indicator tells if nickel-cadmium batteries are being charged.
RADIO-ELECTRONICS Jun 1984 (v.55#6) pg. 90

Versatile battery charger circuit. Will handle from 1 to 6 AA cells and charge at a rate of 50 mA.
RADIO-ELECTRONICS Sep 1985 (v.56#9) pg. 44

Universal battery charger designed to recharge gel-cells, but it can be used to recharge Ni-Cd's and any other type of battery that needs a constant-current source, a constant-voltage source, or both. Est. cost: $10.
RADIO-ELECTRONICS Jul 1986 (v.57#7) pg. 67

How to determine whether a NiCd battery pack is fully charged by monitoring the charging current over time and charting the result.
RADIO-ELECTRONICS May 1988 (v.59#5) pg. 12

Battery-charge indicator for use with a cordless screwdriver.
RADIO-ELECTRONICS Aug 1989 (v.60#8) pg. 12

Solar power supply that can be used even at night. Solar cells are used to charge a Ni-Cd battery inside this 5-volt or 9-volt "booster".
RADIO-ELECTRONICS Aug 1989 (v.60#8) pg. 47, 70

Tip on turning off a battery charger after a set period of time.
RADIO-ELECTRONICS Feb 1990 (v.61#2) pg. 16

An intelligent charging circuit that can be adapted for use with a wide range of batteries. One section monitors and controls the charging of the batteries and another section monitors the amount of charge left in the batteries when they're being used to power a circuit.
RADIO-ELECTRONICS May 1992 (v.63#5) pg. 12

Auto battery charger built around an inexpensive silicon diode rectifier kit can supply up to 1.2 amps at 12 volts DC. The addition of a filter-regulator unit will draw off 3, 6, 9, or 12 volts of low-ripple DC current for use in electronic projects.
RADIO-TV EXPERIMENTER Jun-Jul 1968 (v.24#3) pg. 95

Trickle charger battery booster will recharge any dry cell that has a rating from 1-1/2 to 22-1/2 volts. Est. cost: $3.
RADIO-TV EXPERIMENTER Oct-Nov 1968 (v.25#2) pg. 47

Circuit for a 6 and 12 volt, 12 amp battery charger to work off 117 VAC line.
RADIO-TV EXPERIMENTER Dec 1968-Jan 1969 (v.25#3) pg. 29

Using two clock timers and a charger to keep an idle auto battery fully charged.
SKINNED KNUCKLES #176 Mar 1991 (v.15#8) pg. 29

Setup which uses one charger and a timer to maintain a charge on several 6- and 12-volt batteries.
SKINNED KNUCKLES #200 Mar 1993 (v.17#8) pg. 23

Recharging circuit for gel cells uses a voltage-limited charging method to avoid overcharging.
SKY & TELESCOPE Jul 1989 (v.78#1) pg. 97