In 1896, the Salmin Brothers, a Padua-based publishing company, produced Galileo a Madama Cristina de Lorena (Galileo’s Letter to Christina). It had an embossed cover and slipcase, but it had another, exceptional feature: It was sized at just 0.7 by 0.4 inches. Within, the text is printed in “fly’s eye type,” which is so small that when the Salmin Brothers first used it, for Dante’s Divine Comedy, it reportedly damaged the eyesight of the typesetter. This time, it was used in a title about one-third the size of the previous example—the smallest book ever printed with hand-set, movable type.
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, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, 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.