Kaleidoscopes create impressive visual displays by simply turning a knob. Here is a great design by randofo. Colorful displays can also be created with diffraction gratings. The visuals become even more stunning when you turn one diffraction grating in front of another: here is a video with lasers. This gave me the idea to create a diffraction grating kaleidoscope that makes it easy to turn the diffraction gratings for beautiful light patterns. One thing that makes the device different than usual kaleidoscopes is that it generates different patterns depending on the light source you are looking at.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.