But in an emergency or in the wake of a disaster, a working cell phone or GPS can be a life saver and it would be wise not to count on the availability of a clean, reliable USB power supply.

Power on J1 with a voltage between 8 and 28 Vdc, be carefull about polarity. Then regulate output to 5Vdc with potentiometer on module. After checked that voltage, you can populate Jumper to supply ...

This adorable little board will come in very handy whenever you need a good amount of 5V power. It's the size of a linear regulator, but it's actually a mini-booster! Input 2-5VDC on one side, and get ...