Russlk said:
Do you really need a 2 sided board? All my boards are single sided and where I need a crossover I use a wire jumper.
I've thought about making it single sided, but I think it might be too much trouble in laying it out. my dimensions of the board is 6.75x7.25, and I need:
8 shift register (20 pin dip)
8 drivers for the leds (18 pin dip)
4 40 pin headers (2 for shift resiter control 2 for led out)
64 1/8W resistors
8 bypass caps.
3 vregs
3 heatsinks
6 extra caps for the vregs (dont think I need them, but I'm gonna use em anyway just to be safe.)
I want this board to look good too, I dont want to have ugly jumper wires all over the place. and with the double sided, I wont have to worry about a bad connection on the board as much, so it will help debugging.
Kentken, so you are saying nail polish can be used instead of an etch resist pen? I was thinking about buying one, but my sister has a ton of nailpolish so I should be good.
Does the sodium persulfate need to be heated? My college has a pretty good EE lab, do you think they would carry the sodium persulfate, (or any chemicals for that matter)?
A thinner PCB would be easier to drill, but the boards from goldmine will be about 2.5 times thinner, how strong will this board be? I dont want to get halfway through making it and have it crack in half.