This is an Arduino powered system to allow the construction of giant seven segment displays, up to 50V 0.5A per segment.
The library workes with any Arduino using the SPI protocol, allowing a 4 digit display (32 segements) to be remotely connected via a single ethernet cable.
Two PCB designs are included, one with four digits on one board and another with a single digit per board.
The hardware and library support four channels.
Boards are availible at OshPark
4 Channel: https://oshpark.com/shared_projects/9ZOlH1Lw
Digikey parts list here
1 Channel: https://oshpark.com/shared_projects/VTMd3b0f
Digikey parts list here
Connect to the Arduino with a standard ethernet cable and the SparkFun RJ45 Breakout
https://www.sparkfun.com/products/716
Ethernet | Arduino | Assignment
1 13 Clock - SCK - SHCP
2 11 Data - MOSI - DS
3 9 Digit D X--- Thousands
4 6 Digit A ---X Units
5 8 Digit C -X-- Hundreds
6 7 Digit B --X- Tens
7 +5 VCC
8 GND GND
The power for the big displays goes directly into the PCBs and is seperate from the logic power on the Arduino which travels over the ethernet cable
Power each segement from V+ --> LED segment lights --> Control Board
