This charger circuit will step up the voltage from 1.5V to 5V DC to reach the cell phone charging requirement. The circuit uses only an AA or AAA 1.5v battery (1V to 2.4V). The charger is composed of ...

Cheapie wall-wart phone chargers output 5V nominal, but the actual voltage varies wildly, going as far high as six volts and usually stabilizing between 5 and 5.5 volts while under load.

Discover the top cell phone automobile chargers of 2024 for fast and convenient charging on the go. Stay powered up with these high-performance car chargers for any device.

10 comments on “ Cell-phone charger: nice idea, bad implementation ” duanebenson November 28, 2012. ... I used to run a hybrind circuit board line for a major manufacuterer in Southern California. (28 ...

The charger also sports a USB port for good measure, which you can use to charge your phone or other small devices. The group used a Kickstarter campaign to raise $200,000 for production of the ...

The circuit was essentially ... it should be done safely. [IgorM92] used a phone charger to condition ... It is rare to find a car these days without some mechanism for charging a cell phone.

With just one cup of boiling water, the Bottle Charger can power a cell phone in just 15 to 30 minutes, depending on the temperature around the device.

There’s no question that Apple has their industrial design down pat; comparing a cell phone charger made by Blackberry or Motorola to the tiny 1-inch-cube Apple charger just underscores this … ...

To make this all-in-one wind turbine power bank, round up an old CPU fan, an old phone battery (or a 18650 cell), a small switch and a bike support element. Also, get some tools ready, including a ...

Achieving Five-Star Energy Efficiency in Cell-Phone Chargers Sept. 1, 2009 Cell-phone manufacturers are demanding that no-load, offline charger power should be reduced to 30 mW or less.