Motorola/Tracfone v176 Cell Phone USB Charger

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The purpose of this project is to allow the Motorola/Tracfone V176 cell phone to be charged through a USB port.

Recent Motorola cell handsets (RAZR, W370, etc.) already provide a mini-USB port for charging. Future cell phones will standardize on the micro-USB connector. Standardizing on USB for charging has certain advantages:

  • No need for another wall-wart charger using another space (or two) on your power strip.
  • Eliminate the phantom power drain of a wall-wart charger, which draws a watt or so of power whether or not a device is plugged in for charging.
  • Travel with a single charger (or laptop) for all your electronic toys: iPod, camera, and cell phone.
  • Now you can use portable chargers such as the Altoid charger or Minty-Boost charger.

USB Standards

A USB port can supply 100mA at 4.75 to 5.25volts. A higher current, to a maximum of 500mA, can be drawn if the port follows a particular handshaking protocol.

Pin

Color

Name

1

Red

VBus(5V)

2

White

D-

3

Green

D+

4

Black

Gnd

V176 Charging Requirements

[See rest of article.]

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