Instructables has posted a step-by-step guide to creating your very own dot-matrix display out of not much more than a collection of LEDs, a few wires, some resistors, and a microcontroller. The ...

In Part 1, we confirmed that the LED current change shifts its output light wavelength (color). Because the dot correction function adjusts output current amplitude, a calibration attempt with a dot ...

He used a bi-color 8×8 LED matrix as the clock display. What caught our eye is the point-to-point soldering he used for the three strip boards that make up the device.