Parallax P2 Eval LED Matrix Add-On Board

Description Parallax P2 Eval LED Matrix Add-On Board Equipped with 56 Charlieplexed green LEDs Requires only 8 I/O pins for full LED control Features a pass-through socket for easy stacking Assembled and tested in Rocklin, California The Parallax P2 Eval LED Matrix Add-On Board is equipped with an 8 x 7 grid of Charlieplexed green LEDs. This board is designed to be used with Propeller 2 multicore microcontroller projects, enabling the display of text or graphics across 56 LEDs using a mere 8 I/O pins. The board utilizes Charlieplexing, a technique that controls a larger number of LEDs with fewer I/O pins. This is achieved by leveraging the one-way current flow properties of diodes, including Light Emitting Diodes, in conjunction with the tri-state properties of the Propeller 2 I/O pins. The board does not light multiple LEDs simultaneously but rather switches them on and off rapidly enough to create the illusion of simultaneous illumination to the human eye. This is ach