The Alexander Arrangement is a three-dimensional paper sculpture of the periodic table designed by Roy Alexander, with whom I collaborated on this version. For the first time this clever form of the table has been combined with my photographs of real element samples, resulting in a quite lovely object. The Alexander Arrangement deals with the fundamental problem of gaps in the traditional arrangement of the periodic table by wrapping the transition metals and the lanthanides/actinides into loops, so all the elements that are supposed to be next to each other actually are next to each other. You can read it as a complete spiral loop through all the elements without any
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.