Etch-a-sketch on a VGA monitor using Arduino
Kids love Etch-a-sketch drawing boards. Rob Cai shares on this Instructables post how he has built a Etch-a-sketch like drawing tool using Arduino Uno and a VGA monitor. Besides an Arduino board, this project only requires two potentiometers, two tact switches, and four resistors. The VGA signal is generated in software using the VGAX Arduino library contributed by smaffer.
Etch a sketch like drawing tool using Arduino and a VGA monitor
I used Arduino IDE 1.6.4. and the VGAx library done by Smaffer and publish on GitHub here. This library allows to use four color with a resolution of 120 x 60 pixels. One button is to clear the screen, the second to choose the color. One wheel moves the cursor horizontally and the other vertically. Sound is available too.