Spigot algorithms compute decimal expansions of irrational constants such as Pi, one digit at a time. It is fairly easy to run spigot algorithms on a Raspberry Pi. There is already a Python package called PiDigits that implements a few of the spigot algorithms described in the research literature. However I wanted to make it more visually explicit that my Raspberry Pi was executing a spigot algorithm to compute the digits of Pi. I’ve modified a Pimoroni case for a Raspberry Pi 2 to give the appearance of digits streaming from a spigot. The spigot’s check valve is a 10K potentiometer. The LEDs come from a Poundworld Christmas decoration. The digits are displayed on 5 daisy chained MAX7219 8×8 LED modules.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
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.