Knob Sketching

Build a fun sketch drawing toy using CircuitPython and 3D Printing. Powered by the Feather M4 and 2.4in TFT FeatherWing.

Draw letters and shapes to create your own artwork using knobs!

3D print a snap fit case to house all of the electronics!


Pixel Drawing

Use the two knobs to move a cursor up, down, left and right. The toggle switch lets you do a pen up and down so you can turn off drawing to make separate shapes. Use the button to clear the screen.

Easily customize the background and drawing colors using CircuitPython!


View of a TFT FeatherWing - 2.4" 320x240 Touchscreen For All Feathers. A polished finger drawing a heart on the touch screen.
A Feather board without ambition is a Feather board without FeatherWings! Spice up your Feather project with a beautiful 2.4" touchscreen display shield with built in microSD card...
In Stock
Angled shot of a Adafruit Feather M4 Express.
It's what you've been waiting for, the Feather M4 Express featuring ATSAMD51. This Feather is fast like a swift, smart like an owl, strong like a ox-bird (it's half ox,...
In Stock
Angled shot of 16mm burgundy panel mount pushbutton.
OK, this item is pretty simple - it's a panel mount pushbutton. It's not that exciting, no LEDs, no bells & whistles. But we really like it anyways – look at that...
In Stock
Mini Panel Mount SPDT Toggle Switch
This or that, one or the other, perhaps or perhaps not! So hard to make decisions these days without feeling like you're just going back and forth constantly. Deciding whether or...
In Stock
Breadboard Friendly Panel Mount 10K potentiometer linear.
This potentiometer is a two-in-one, good in a breadboard or with a panel. It's a fairly standard linear taper 10K ohm potentiometer, with a grippy shaft. It's smooth and easy...
In Stock
Lithium Ion Polymer Battery 3.7v 1200mAh with JST 2-PH connector
Lithium-ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light, and powerful. The output ranges from 4.2V when completely charged to 3.7V. This...
In Stock
1 x Short Female Headers
12-pin and 16-pin male header set
1 x Right Angled Male Header
Break-away 0.1" 36-pin
1 x Silicon Cover Stranded Wire
30AWG in Various Colors

Optional Knobs

2 x Aluminum Knobs
Matte Black Aluminum Alloy Knobs for Potentiometers

This guide was first published on Mar 01, 2022. It was last updated on Jun 19, 2024.

This page (Overview) was last updated on Mar 08, 2024.

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