This version of Solitaire is played with an array of LEDs instead of pegs, with a microcontroller behind the scenes to check if you’re any good at playing. As you’ll soon find, the game is challenging and addictive!

This project is a fine instance of a microcontroller and its resident software slashing component count when implementing a logic circuit, as well as providing yet an another answer to the perennial “great-but-what-do-you-do with-it?” question from outsiders and newbies when discussing those multi-legged beasts commonly known as microcontrollers. The design is based on the Atmel AT90S2313 microcontroller which was selected for its low cost, speed, number of I/O lines and ease of programming in assembly code using free tools.