reset and GND for external reset button. And the 2 standalone pins below the mini is the +5/GND pin header for the bluetooth module.
Yes it's to be a stacked shield. It's going to get power via wire jumpers from the logic board's 3V3 and ground. I have pass-through headers on the logic level for this reason.
You could take advantage of ground planes also, will give you more room for your thicker traces.
RST (reset) pin of the LCD (orange wire) to pin 2 of the 4050CS (chip select) pin (yellow wire) to pin 4 of the 4050.D/C (data/command) pin (green wire) to pin 6 of the 4050DIN (data in) pin (blue wire) to pin 15 of the 4050CLK(clock) pin (purple wire) to pin 12 of the 4050.Arduino pin 3 (orange) goes to pin 3 of the 4050.Arduino pin 4 (yellow) goes to pin 5 of the 4050.Arduino pin 5 (green) goes to pin 7 of the 4050.Arduino pin 6 (blue) goes to pin 14 of the 4050.Arduino pin 7 (violet) goes to pin 11 of the 4050.
This discussion just went over my head :blush:Arduino Mini doesn't have 3V3 onboard to feed the shield. Have to get it from elsewheres. No easy way to get ground from..anywhere..to the IC, so have to get it from elsewheres as well. Thus 2 power wires going to nearest tappable 3V3 and GND (the logic level).
Quote from: magnethead794 on Dec 12, 2011, 03:34 amThis discussion just went over my head :blush:Arduino Mini doesn't have 3V3 onboard to feed the shield. Have to get it from elsewheres. No easy way to get ground from..anywhere..to the IC, so have to get it from elsewheres as well. Thus 2 power wires going to nearest tappable 3V3 and GND (the logic level).No, see this is where a ground plane comes into play. Then it doesn't matter where you grab it from, ground is ground and will remain ground.Ok, let me see if I can figure this out. You are putting a mini onto the large board. Then, you are stacking the smaller board on top of that?
Ok, I see what you mean about the 3V3 for the stackable board. Is the attached picture of a mini the same as yours? You need to tie those ground pins together (which a ground plane will easily handle, no need for traces all over the place.)
The single trace going to pin 5, is there a reason why you just have a single pin there, as opposed to two pins like everywhere else?
Also, you know your stacked board doesn't match the headers (by one row), right? The headers are 0.1" wider ...
Yes, and I currently don't have the grounds tied....
breakout pin is optional for pin 5 since it's reserved for the frequency counter library
well shoot, I missed that. And I don't really know how to fix it, either...I can't flip the IC because that makes all the data lines cross in an ugly fashion...Idea- bring the right side in 1 column, and sacrifice the +5V and A1 pins.