Category Archives: Arduino

Retro LED Displays

I recently found some HP 5082-7433 LED bubble display modules on eBay. These are three digit, 7 segment displays with decimal points. The “bubble” is a magnifying lens molded into the epoxy package. I ended up finding a datasheet (warning, … Continue reading

Posted in Arduino, Electronics | 3 Comments

Interfacing the PS/2 Keyboard

As an exercise, and to help me learn about the protocol, I’ve set up my trusty Arduino to read scancodes from a PS/2 keyboard. The protocol is fairly simple. The keyboard uses four pins in the connector whether it is … Continue reading

Posted in Arduino | 2 Comments