U of L LED Sign Schematic

The schematic above is basic circuitry used in the implementation on the sign. It is powered by the A3BU, goes through a 110 ohm resistor before continuing to the LEDs where it daisy chains to each LED in that particular circuit. As mentioned above, there are 7 different circuits on the sign. One circuit for each of the LED colors(5) and two for the red and white LEDs on the letters ā€œUā€ and ā€œLā€. This was done because we wanted to display U L without the rest of the sign being lighted. Although this is very basic circuitry, there were 114 LEDs on the sign, therefor soldering all the connections was very time consuming. But, it went together very well and we had no bad LEDs or bad connections to redo. The 5V power was coming from the J1 header on the A3BU. We used 7 J1 header pins, one for each circuit, and then grounded all LEDs to the A3BU via one ground.