This is the Adafruit 0.56" 4-Digit 14-Segment Display w/ FeatherWing Combo Pack! Display, elegantly, 012345678 or 9! Gaze, hypnotized, at ABCDEFGHIJKLM - well it can display the whole alphabet. You get the point. It is a nice, bright alphanumeric display that shows letters and numbers in a beautiful hue.
Adafruit's Bluefruit HID controller is the easiest way to instantly add an HID keyboard or mouse interface to your project, even without a microcontroller. Did you know that you can also use it to convert a normal wired keyboard to supporting Bluetooth? In this project you'll learn exactly how to do it.. and in the process you'll bring an iconic piece of computing hardware into the modern age. Time to start digging around in your closet for that old IBM PC you haven't seen for a few years, because with Bluefruit and the Model M, "it just clicks".
7-Segment Matrices like these are 'multiplexed' - so to control all the seven-segment LEDs you need 14 pins. That's a lot of pins! Here at Adafruit we feel your pain. After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these 7-Segment LED FeatherWings come in!