Blinkenwall.com/Controller

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Blinkenwall Controller

Case is from a Sun Cobalt RaQ 550.

Front Panel

The front panel has the following connector:

Raq 550 Pinout
Function Pin Pin Function
Display Enable 1 2 Transceiver !OE
GND 3 4 +5V
Display D1 5 6 Display D0
Display D3, Button Up 7 8 Display D2, Button Left
Display D5, Button Right 9 10 Display D4, Button Down
Display D7, Button S 11 12 Display D6, Button E
Display RS 13 14 Display R/W
GND 15 16 VCC
LED Cathode "Earth" 17 18 NC
LED Cathode "HD 1" 19 20 LED Cathode "LAN 1"
LED Cathode "HD 2" 21 22 LED Anode "Wrench"
LED Cathode Power Button (two LEDs in parallel!) 23 24 LED Cathode "ETH 1"
LED Cathode "LAN 2" 25 26 Button Power (with HW debouncing)
GND 27 28 VCC
NC 29 30 NC
LED Cathode "ETH 2" 31 32 NC
NC 33 34 NC

The transceiver is used so that you can put the display data pins and he buttons on the same GPIOs. It's a 74F245. The display is a HDM16216L-5-LCEP.