Convert old chargers into USB ones

Nice write-up on how to take some old cell chargers (assuming they are 5volt and over .5A) and convert them to USB based ones.  If you have a bunch of old USB cables and chargers, this is a worth while hack.

http://hackaday.com/2014/03/12/usb-ify-your-old-cell-phone-chargers/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+hackaday%2FLgoM+%28Hack+a+Day%29

http://www.martinmelchior.be/2014/03/give-your-old-phone-chargers-second-life.html