Have you ever needed to set a servo to a specific angle, test its range or smoothness of motion, or figure out what its pulse width bounds are? This project will help you to all that.

Running out of space for you code? Need some functions to run really, really fast? This guide will walk you through writing modules in C that are callable from CircuitPython.

By adding a magnetometer to the Circuit Playground Express we can make it into a compass, using the builtin NeoPixels to indicate North. This guide does just that, and packages it up with a 3D printed case.

Make a HalloWing based interactive cat toy that responds to the cat with images, lights and sound.

Have you been an Arduino coder but would like to learn CircuitPython. This guide shows you how to use CircuitPython by showing you the similarities to Arduino.

Using a Feather M4 Express, an OLED FeatherWing, a rotary encoder, and CircuitPython, you can make a waveform generator with selectable waveform and frequency. Great for testing many circuits.

Here's a funny little bot based on a locomotion idea we found online. We scaled it up, adding individually controllable sides with two motors. This version is driven by a CRICKIT, in this case the FeatherWing version and an M0 Bluefruit Feather to allow it to be controlled remotely.

Lists are a central data structure in Python. This guide will look at list usage, cases where lists are too big to fit in memory (maybe even infinitely long), then contain items that are easily computable on the fly.

Use a robot body and the CRICKIT robotics platform. Then customize by adding some brains to it in 3 different ways: choosing from 3 different sets of hardware and three different programming languages.

Use the accelerometer on the Circuit Playground Express to perk up an ear when you tilt your head.

This guide will provide an introduction to bipolar junction transistors: the basics of how they work, and how to use them. Special focus is on controlling higher power/current circuits from low power/current microcontrollers.

Build a pair of animated ears that use servos and a Circuit Playground Express to perk up when there's a loud noise. Perfect for around friends, communing with your pet, or to dress up your next cosplay

Take a pair of glasses, some flip up shades, a Circuit Playground Express, and a micro servo. Put them together to make a pair of glasses that automatically flip down the shades and turn into a flashlight depending on how bright the light is around you.

This guide will introduce you to lisp and Forth and how to get them up & running on your SAMD51 based Feather, ItsyBitsy, and Metro boards.

What could be cooler that controlling a robot using just hand positions? This project shows how to do just that using the IR capabilities of the Circuit Playground Express: one on a glove and one controlling a robot. It's almost like using The Force.