Product Added : March 2nd, 2013
Category : Cell Phones
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Query by Elliott R: How to develop a cell phone charging station (for a number of cell phones)?
I’m looking at building a transportable multiple phone charging station employing a battery (automobile battery? possibly motorcycle battery?). Ideally it would be able to charge (through USB) 5-ten phones at after. What would be the optimal way of doing this?
Answer by lee26loo大秦後人
USB output from pc is 5V and limit the present not a lot more than 100mA to 250mA depending on the laptop mother board design and style.
To convert 12V vehicle battery into 5V , use regulator LM7805 can output not a lot more than 1A.
Build ten sets for ten phones. Connect a tiny 6V light bulb to the output of LM7805 as its little load even though no phone is connected to its output. Also this modest light bulb acts as a 5V standby indicator.
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