13th May 2012

M’Day: Low Power Motion Sensor Arduino Night Light…

A few years back I made a motion sensitive night light as a Mother’s day gift and while it worked pretty well it really chewed out the batteries.  And as...

28th Jan 2012

ADC Battery Voltage: Divide, Match and Measure…

While the stock Arduino isn’t particularly well geared to running from a battery source, there are times it will be useful to know the status of our battery voltage. Using...

15th Dec 2011

Catching some ZZZs, Part 1: Interrupted Sleep

So you finished your lastest Arduino project, hooked up a 9volt battery to the VIN and stuck the whole thing into a project box. You come back a few hours...