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Battery charger circuit diagrams
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
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
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
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
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
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
June 22, 2010
Overcharging apparently leads to voltage depression, which can be corrected by one or two complete discharges (to 1 to 1.1 volts per cell). [more]
June 22, 2010
Here is a deluxe version of the simple charge rate limiter, using the same idea but with the ability to charge two packs simultaneously from a single wall charger. [more]
June 22, 2010
This circuit was created for digital cameras. It's known the digital cameras have considerable power consumption. [more]
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