Some time ago, I occasionally bought an HP 5082-7010 LED display, which I did not have time to test if working properly. Today I decided to do this with the help of Analog Discovery 3.
The HP 5082-7010 is a single-digit red LED numeric display module with a built-in BCD decoder/driver. It uses a 5×7 dot-matrix to display digits 0–9 directly from binary-coded decimal inputs, making it easy to interface with digital systems. Designed in a hermetic, rugged package, it is suitable for military and industrial environments, offering TTL compatibility and adjustable brightness. Below there are dimensions and pinout specification:
So, for a quick test, it is required to connect VCC, Vled, GND and Inputs 8,4,2,1. I have decided to make that connection on breadboard and connect to the Analog Discovery 3. The VCC together with Vled was connected to the V+ of Analog Discovery 3. And the Inputs 8,4,2,1 respectively to the DIO 0,1,2,3 on Analog Discovery 3.
According to the truth table, with the proper drive of inputs 8,4,2,1 we can display a given digit:
I have used WaveForms Supplies to provide 5V for VCC and Vled and StaticIO to display digits. Under StaticIO I have configured pins 0,1,2,3 as switches with Push-Pull mode.
Thanks to that, I was able to quickly test all characters. Additionally, if needed, with usage of Script mode, it is possible to run automatic tests in case of more display modules to test.