Different from a roulette curve drawing machine, such as a Spirograph, a harmonograph/pintograph generates Lissajous curves that are bounded by four corners.
By adjusting the pivots and motor speed ratios using the Circuit Playground Express buttons, you can make different types of drawings.
You’ll even get to merge the worlds of Crickit and LEGO with this TT motor-to-Technic cross axle! And, a very stylish 3D printed Crickit-to-LEGO plate finishes it off.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.