[Stefan Schüller] was a fan of the LED signs that display arrival information for the trams and buses in their city of Zürich. [Stefan] was having trouble finding a source to purchase the signs so, ...

[Stan] built this LED matrix using a 16×16 grid of RGB LEDs. He built the hardware and wrote some subroutines to randomize the colors. He’s not using PWM because frame buffering is not feasible for ...

You can build a matrix of RGB(red/green/blue) LEDs using a simpleand inexpensive circuit comprising thecontrol logic and driver circuit in Figure 1 and some LEDs (Figure 2). The centerRGB LED is the ...