Contact lenses are the sort of everyday object that have become so commonplace to us, it is hard to appreciate just how strange they are in concept. How exactly did we arrive at putting small pieces of glass or plastic on our eyes to improve vision?
Early thinkers who considered the principles behind our modern contact lenses include Leonardo da Vinci, René Descartes and Thomas Young of Young’s modulus fame. Descartes, for instance, considered the idea of a liquid-filled glass cylinder, one end of which would be placed directly on the cornea.
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.
Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
