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Lithium-Polymer Peak Charger
Lithium-Polymer Peak Charger
August 4, 2010

This circuit was developed to charge the Lithium-Polymer cells used in a model aircraft. Lithium-Polymer cells are incredibly lightweight compared to Ni-cad battery packs of the same voltage and amp-hour rating. Their only drawback is... [more]

Low Cost Universal Battery Charger Schematic
Low Cost Universal Battery Charger Schematic
August 4, 2010

This circuit is Ideal for car use. It has ability to transform a mains adapter in to a charger . This one can be used to charge cellular phone, toys, portables, video batteries, MP3 players,... [more]


circuit from:http://www.extremecircuits.net/2009/10/low-cost-universal-battery-charger.html

Mobile Cellphone Battery Charger Circuit
Mobile Cellphone Battery Charger Circuit
August 4, 2010

Charging of the mobile phone, cellphone battery is a big problem while traveling as power supply source is not generally accessible. If you keep your cellphone switched on continuously, its battery will go flat within... [more]


circuit from:http://www.extremecircuits.net/2009/08/mobile-cellphone-battery-charger.html

Mobile Phone Battery Charger Circuit
Mobile Phone Battery Charger Circuit
August 4, 2010

Mobile phone chargers available in the market are quite expensive. The circuit presented here comes as a low-cost alternative to charge mobile telephones/battery packs with a rating of 7.2 volts. [more]


circuit from:http://www.extremecircuits.net/2009/07/mobile-phone-battery-charger-circuit.html

Mobile Phone Travel Charger Circuit Diagram
Mobile Phone Travel Charger Circuit Diagram
August 4, 2010

Here is an ideal Mobile charger using 1.5 volt pen cells to charge mobile phone while traveling. It can replenish cell phone battery three or four times in places where AC power is not available.... [more]


circuit from:http://www.extremecircuits.net/2010/02/mobile-phone-travel-charger-circuit.html

Mobile Phone and iPod Battery Charger Circuit
Mobile Phone and iPod Battery Charger Circuit
August 4, 2010

Using the USB port on your computer to charge your player’s batteries is not always practical. What if you do not have a computer available at the time or if you do not want to... [more]


circuit from:http://www.extremecircuits.net/2009/08/mobile-phone-and-ipod-battery-charger.html

NiCd Battery Charger With Reverse Polarity Protection
NiCd Battery Charger With Reverse Polarity Protection
August 4, 2010

This NiCd battery Charger can charge up to 7 NiCd batteries connected in series. This number can be increased if the power supply is increased with 1.65V for each supplementary battery. If Q2 is mounted... [more]


circuit from:http://www.extremecircuits.net/2010/02/nicd-battery-charger-with-reverse.html

NiMh and NiCd Battery Charger Circuit
NiMh and NiCd Battery Charger Circuit
August 4, 2010

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? Because you can leave the battery for... [more]


circuit from:http://www.extremecircuits.net/2010/02/nimh-and-nicd-battery-charger-circuit.html

USB Powered Mobile Phone Battery Charger
USB Powered Mobile Phone Battery Charger
August 4, 2010

This simple circuit can give regulated 4.7 volts for charging a mobile phone. USB outlet can give 5 volts DC at 100mA current which is sufficient for the slow charging of mobile phones. Most of... [more]


circuit from:http://www.extremecircuits.net/2010/02/usb-powered-mobile-phone-battery.html

Regulated 12 Volt Supply
Regulated 12 Volt Supply
June 26, 2010

A basic regulated 12 Volt power supply [more]



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