12th Feb 2012

Shake, Rattle & Roll: The MMA8453Q & Arduino

So we finally finished putting the polish on our latest Arduino library designed for use with the MMA8453Q Accelerometer and its siblings the MMA8451 and MMA8452.  This library gets you...

29th Jan 2012

How to: LED as a Light Sensor

LEDs LEDs LEDs, is there anything they can’t do?  Besides adding that special crunchiness to smooth peanut butter, they also make awesome light level sensors.  Here’s one way to do...

28th Jan 2012

How to: A TriggerTrap GH1 Cable…

The above schematic illustrates how to wire the Panasonic GH1 to the TriggerTrap universal camera trigger.  The TriggerTrap uses an opto couple wired common cathode to isolate and protect the...

28th Jan 2012

Supply Droop: Internal Resistance is Futile…

What causes a battery supply voltage to drop when the load increases? Internal resistance does, and while it’s normally around 0.2 ohms per alkaline cell, here is a bit of...

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...

27th Jan 2012

ColorBabel: Hue to RGB, do you copy?

When talking in the color space one should speak lightly.  Illustrated here is a translation from 10 bit hue to discrete 8 bit PWM levels for red, green and blue...

26th Jan 2012

RGB LEDs: Onstar Characterization…

Though incorrectly marked as common cathode, these common anode high power tri-color LEDs are standard fare across most discount parts websites, eBay included. They are sold with a 3W designation,...

19th Jan 2012

LAVA Rainbow LED kit

 Assembly Instructions for LAVA LED Soldering Kit…