Telecran (Etch a Sketch) + Arduino = Telecranduino ! using arduino




I came across a bunch of stepper motors and I have since been looking for a project to do with the kids.

An old Telecran (French for Etch-a-Sketch) later, we are in business !
Telecran




What I used for this project:
– an arduino Uno
– 2 stepper motors
– 2 easydrivers v44 (by www.sparkfun.com)
– various Fishertechnik parts (http://www.fischertechnik.com)
– a push button.

Optional parts:
– a sensor shield + 2 push buttons
– a Nintendo Wii Nunchuck
– a WiiChuck adapter

And also:
– hot glue gun

Step 1: Mechanics

The mechanical part has been done with some Fishertechniks parts.

I had to drill into the stepper cogs as the axis of the steppers were 5mm where the FT standard is 4 mm.

The other cogs were simply hot glued onto the Telecran (Etch-a-sketch) knobs.

The rest is best explained in pictures…

Step 2: Steppers

Some details of the motors and the final assembly.

Step 3: Arduino

To drive the steppers I used a couple of easy driver board from Sparkfun.

Very straight forward. Note the emergency button that allows to put the motors to sleep in case of a runaway sketch.

I added a sensor shield to the arduino for convenience as I have a couple of push buttons (with a pull-up resistor) already cabled.

WiiChuck adapter is one of my favorite. Although the Nunchuck is a little more difficult to program than it may first appear.

Telecran

Step 4: Schematics

Step 5: Code – sketch.

If NUNCHUCK is defined then the code will be compiled with Nunchuck support.
The motors are then controlled exclusively with the Wii Nunchuck..

READ  Easy, Reversible Motor Control for Arduino (or any Microcontroller) using arduino

 

For more detail: Telecran (Etch a Sketch) + Arduino = Telecranduino !




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