Reverse Engineering a 1992 DATA Display #piday #raspberrypi @Raspberry_Pi
This is a great project that reuses an LED display found on buses in the 1990s. Translated from the original:
I recently recovered a display bus brand DATA Display (1992, at the sight of datecode components). The display consists of two parts:
Part of a top, consisting of two green segments 12 of dies (7 × 5 each), or a large array of (2 * (12 * 5)) * 7 pixels.
The bottom part, a bit the same, but with red pixels
The bottom part is interesting because it seems to contain a RAM, with external connection (and a NiMH battery to retain RAM) can be upload messages to display. By cons, manufacturers do not have the transmission protocol. It will be a bit boring to reverse-engeenirer.
The top part, it is almost identical. Except that it contains a ROM containing the characters ASCII (at least, their representation in matrix 5 × 7) to display the text. It also has a special connection (RS232, but not too much). It’s going to be boring to do. But I decided to disassemble the upper display and watch how it worked.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.