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1. Below is what I have made so far, using ExpressPCB. How wide do I need to make the tracks and do I need to make them that wide back to ground? (or is it not an issue on this scale?)
2. Can the ground of two different battery's be linked? Should this be avoided?
Hey ozbot Smiley your layout looks nice but is it complete yet?I see quite a few connections which im guessing you want to make using wires.Also, just wanted to know what programmer you re using since i saw a 6 pin connector.
the only problem i can see is the non-common ground... correct this and it should be fine.
its a good idea to widen the Vcc track but to take advantage of that you should widen the Gnd track too.
do a test, get out your multimeter and see if there is a connection inside the chip...