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Homebrew USB Charger
Posted on August 19th, 2009 4 comments
Homebrew USB Charger
There are plenty of examples on the net on how to build your own usb charger, but since we didn’t have any on our site I figured I’d share it with you. I found an old wall wort in my junk drawer that I couldn’t remember what it went to, so I figured it would be great to put it to a good use as a USB device charger. Because I didn’t have a clue what the maximum current draw requirements were for a USB device, I found the requirements on USB.org’s website.
Difficulty : MEDIUM - SAFETY WARNING, Shock Hazard
Time: 1 hour -
Budget USB Enabled GPS
Posted on February 28th, 2009 9 comments
GPS-500 Setup
Looking for a cheap GPS receiver? Look no further than the GPS-500 Microsoft Streets and Trips GPS by Pharos. This tiny unit features a SiRF Star III chipset and most are selling on ebay for just under 10 dollars! This GPS receiver can be interfaced via a RS232 serial link using a MAX232 chip from Maxim IC and a low cost USB to serial converter.
Difficulty : Medium
Time: 1 Hour