Circuit Wiring Solution

USB Mobile Phone Battery Charger Circuit

This simple ambit can accord adapted 4.7 volts for charging a adaptable phone. USB aperture can accord 5 volts DC at 100mA accepted which is acceptable for the apathetic charging of adaptable phones. Most of the Adaptable Buzz batteries are rated 3.6 volts at 1000 to 1300 mAh. These array packs accept 3 NiMh or Lithium beef accepting 1.2 volt rating. Usually the array backpack requires 4.5 volts at 300-500 mA accepted for fast charging.

But low accepted charging is bigger to access the ability of the battery. The ambit declared actuality provides 4.7 adapted voltage and acceptable accepted for the apathetic charging of the adaptable phone. Transistor Q1 is acclimated to accord the adapted output. Any average ability NPN transistor like CL100, BD139, TIP122 can be used. Zener diode D2 controls the achievement voltage and D1 protects the polarity of the achievement supply. Front end of the ambit should be affiliated to a A blazon USB plug.

Connect a red wire to pin1 and atramentous wire to pin 4 of the bung for accessible polarity identification. Affix the achievement to a acceptable charger pin to affix it with the adaptable phone. After accumulating the schema, admit the USB bung into the atrium and admeasurement the achievement from the schema. If the achievement is OK and polarity is correct, affix it with the adaptable phone.
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