https://www.dropbox.com/s/p0y0s7xhj8qqhb7/LED%20cube%20board.brd?dl=0 my current WIP at this point.
Can anyone explain the air wire between GND and VCC near the bottom? Picture: https://imgur.com/on0AMd8 the pink arrow. There's also a few yellow X's where the trace connects with decoupling capacitor pins, like Eagle doesn't know those traces are connected with capacitor's leg.
I don't have the schematic for this one, I got the original one from https://www.oshpark.com/shared_projects/LyWFDL0A There was some mistakes with the original board, some grounds rails weren't connected, and the decoupling capacitor was in series between VCC rail and the chip's VCC pin, this would have isolated and prevented all 9 chips from getting power. I changed the caps so all VCC pins were connected directly to VCC rail, and the capacitor now connects from VCC to ground. Also fixed a couple missing ground connections to the 16 transistors and to ground pin of one of the chip. It's almost like the previous person designed the board without using Eagle's schematic for some reason? Oh and I added text of pin function with the 2 pin headers, marked all 9 chips, and noted all resistor (except one marked 330) and all capacitors are the same value 100 and 0.1uF
Anyway can someone double check that I don't have VCC and ground crossed and see why there's air wire trying to connect that 2? It'd be around $60 down the drain if the board was useless because I missed something.
Still to do: replace 16 pin header with 12 as 4 of the pins aren't used and one pin (15) is in the way of the circuit trace.
