Join us on Wednesday, June 9 at noon Pacific for the LED Matrix Hack Chat with Garrett Mace! It’s pretty amazing how quickly light-emitting diodes went from physics lab curiosity to a mainstream ...

Each 8-pin DIP has two 5×7-matrix, high-visibility LED displays. They bear date codes from the late 80s under the part number, GPD340, but sadly, precious little data about them could be dredged ...