Procedure
1. measure install position on a perf board
2. draw LED positions
3. set LEDs on a perf board(high resolution to low resolution)
4. soldering (6 power line , 1 ground line - conncet all ground together)
1st group - 28 LEDs
2nd group - 19 LED
s3rd group - 24 LEDs
4th group - 24 LEDs
5th group - 20 LEDs
6th group - 28 LEDs
total LED : 143 LEDs for one set
Ji Sun Lee, Emery Martin, Robert C. Moon