Hack an Etch a Sketch Into a Temperature Data Logger

Here's an electronics project that may not have a huge amount of practical applications but definitely has a wow factor for educational use.

Electronics hobbyist weblog Whiskey Tango Hotel used stepper motors from a dot matrix printer to control the knobs of an Etch a Sketch toy. From there a temperature sensor was wired to the project so that temperature changes are recorded in a way where the Etch a Sketch acts as a strip chart.

Once the stepper motors were properly identified the author used three microcontrollers to drive the motors and created a mount for the Etch a Sketch using a baseball display case. Once the mechanical function was figured out the author wired in a temperature sensor and two buttons to move the stylus on the Etch a Sketch. After all of that was working the software was debugged until it correctly "sketched" the temperature every 750 milliseconds.

A full schematic and build details can be found at the source link below.

"Etch a Sketch" Turned Temperature Data Logger | Whiskey Tango Hotel via Hacked Gadgets

Source: http://feeds.gawker.com/~r/lifehacker/full/~3/h09XZUk-ptQ/hack-an-etch-a-sketch-into-a-temperature-data-logger

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