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ISL6291 Li-ion/Li Polymer Linear Battery Charger – Circuit Schematic
ISL6291 Li-ion/Li Polymer Linear Battery Charger
The ISL6291 provides a low-cost integrated charger solution for single-cell Li-ion and Li Polymer rechargeable batteries. No external pass element, current sens...
ISL88731 SMBus Level 2 Battery Charger – Circuit Schematic
ISL88731 SMBus Level 2 Battery Charger
The ISL88731 is a highly integrated Lithium-ion battery charger controller, programmable over the SMBus system management bus (SMBus). The ISL88731 is intended ...
Single and Double Switch Cell Voltage Equalizers for Series-Connected Lithium-Ion Cells and Supercapacitors – Circuit Schematic
Single and Double Switch Cell Voltage Equalizers for Series-Connected Lithium-Ion Cells and Supercapacitors
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Solarize your backpack and power all your gizmos – Circuit Schematic
Solarize your backpack and power all your gizmos
In this instructable I`ll show you how to build a detachable solar panel and battery charger for your backpack. This can power or charge all your gadg.....
Li-Ion Battery capacity tester – Circuit Schematic
Li-Ion Battery capacity tester
I assume anyone who wants to make this can read the schematics bellow Basic principles:NOTE:Li-Ion batteries shouldn`t be discharged bellow 3V (In.....
Joule Thief Charger – Circuit Schematic
Joule Thief Charger
Let your dead battery give life to another! An open circuit Joule Thief can put out 50 or more volts. Enough to charge a AA or AAA Nicad or NiMH rec.....
Lithium charger – Circuit Schematic
Lithium charger
You will need this project when you have an extra mobile battery or you need to charge any lithium, Lithium ion or Lithium Polymer battery. Maximum c.....
iPod charger Schematic – Circuit Schematic
iPod charger Schematic
First off I should mention that this is supplemental Instructable to the countless others that show you how to build a USB charger. I am assuming you.....
Desulfator for 12V Car Batteries – Circuit Schematic
Desulfator for 12V Car Batteries
Hello Everybody! After a year or so of reading and drooling over other people`s wonderful projects in these pages I decided to finally make one of my.....
24V Battery Charger Schematic – Circuit Schematic
24V Battery Charger Schematic
240/24Vac(rms) transformer was used. After rectification and filtration i got about 30Vdc. Therefore the transformer and diode rating should be well chosen to m...
12V Battery checker circuit – Circuit Schematic
12V Battery checker circuit
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Safety / Protection Circuits – Circuit Schematic
Safety / Protection Circuits
To avoid the deep discharge that can destroy or shorten the life of a rechargeable battery, you must disconnect its load before the discharge is complete Circui...
Solar Cell and Photovoltaic Circuits – Circuit Schematic
Solar Cell and Photovoltaic Circuits
This almost trivial circuit may be used to charge a pair of AA or AAA sized cells in the sun. I have used it to keep my Palm Pilot and walkman radio running per...
Solar Panel Based Charger And Small LED Lamp circuit – Circuit Schematic
Solar Panel Based Charger And Small LED Lamp circuit
You can save on your electricity bills by switching to alternative sources of power. The photovoltaic module or solar panel described here is capable of deliver...
NiMh and NiCd Battery Charger Circuit – Circuit Schematic
NiMh and NiCd Battery Charger Circuit
This automatic NiCd charger for 9V NiCd batteries is using 555 timer properties and is very easy to build. Why is an automatic 9 volts NiCd battery charger? Bec...
In-Car Charger And Switcher Circuit For SLA Battery circuit – Circuit Schematic
In-Car Charger And Switcher Circuit For SLA Battery circuit
The SLA battery is charged from the vehicle s battery. When the engine is running, the voltage remains fairly constant, which greatly simplifies the charging ci...
Versatile Micropower Battery Protector circuit – Circuit Schematic
Versatile Micropower Battery Protector circuit
Protect your expensive batteries from discharge damage with this mini-sized electronic cutout switch. It uses virtually no power and can be built to suit a wide...
Constant Current Battery Charger circuit – Circuit Schematic
Constant Current Battery Charger circuit
A simple method of charging a battery from a higher voltage battery is shown in the circuit below to the left. Only one resistor is needed to set the desired ch...
2 Cell Lithium Ion Charger circuit – Circuit Schematic
2 Cell Lithium Ion Charger circuit
This circuit was build to charge a couple series Lithium cells (3.6 volts each, 1 Amp Hour capacity) installed in a portable transistor radio.....
3.6 Volt cell phone battery meter circuit – Circuit Schematic
3.6 Volt cell phone battery meter circuit
This is a similar circuit to the above and provides a 4 LED bar graph indicating the voltage of a common 3.6 volt Lithium - Ion recharable cell phone battery. T...