So far we've built the Etch-A-Snap and processed an image to produce a 1 bit image. In this part we’ll look at how to take this image and generate the draw instructions for the plotter.
Etch-A-Sketch is a very simple 2D plotter which is limited to drawing a single …
The image processing produces a 1 bit image (B&W) of 240x144 pixels. The next step is to take this image and convert it into movements for the motors.
The way this is done is governed largely by the design of the Etch-A-Sketch — any drawing must be made in one …
Etch-A-Sketch is a very simple 2D plotter which is limited to drawing a single unbroken line, of a single thickness and colour which is dark-ish on a silver-ish screen. To be able to plot a photo onto the Etch-A-Sketch we need to transform the image so that —
|Pocket Etch-A-Sketch Not the really really tiny one.||amazon|
|3D PrinterI have & recommend the Anycubic i3 Mega.||amazon|
|PLARed, white & black||amazon|
|2x 5V 28BYJ-485V stepper motor.||amazon|
|2x ULN2003A IC Darlington array, as stepper driver chip.||amazon|
|1x 330Ω resistor for LED driven off Pi …|
Etch-A-Snap is (probably) the worlds first Etch-A-Sketch Camera. Powered by a Raspberry Pi Zero (or Zero W) it snaps photos just like any other camera, but outputs them by drawing to an Pocket Etch-A-Sketch screen. Quite slowly.
Photos are processed down to 240x144 pixel 1-bit (black & white) line drawings using …