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...

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...

04th Dec 2011

How to: Testing an N-Channel MOSFET

If life hands you lemons, you’d better test them to make sure they are lemons.  Here’s a few handy steps for testing the magic smoke containment system of N channel...

30th Nov 2011

Capturing: Fuji S2000HD IR Codes…

Sometimes all the searching in the world won’t find you what your looking for.  This being the case with the shutter IR trigger codes for the Fuji S2000HD digital camera. ...

09th Nov 2011

Arduino Serial Graph

Here is a simple bit of Arduino code that is handy for testing analog sensors. It will fill the screen with a scrolling graphic representation of the sensor value. In...

01st Aug 2011

AtTouch Library for Arduino and the AT42QT1070

As a follow up to the previous post, I would like to present to readers the new AT Touch for the Arduino. This library wraps the code mentioned in the...

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