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I found a short phone splitter and have cut off the outer plastic so that I have two female phone jacks (jills?) at one end and 4 colored wires about 3 or 4 inches long on the other end. I'll put that in the unit and use a long phone cord (hopefully) for everything permanent in the car. Once you take off the outer wrap, it is 4 wires that can go in different directions if they need to. I don't know what all sizes phone cords come in, but it seems to me that a 15 foot cord should reach anywhere I need it to, right?
I'm looking over the wiring diagram now and looking up what all the symbols mean and thinking out what I'm going to do. I have a breadboard with copper contacts on one side of it. I'm following the speedometer sensor wire as it comes in and it first comes to a resister and then a zener. Am I going to solder the resister and the zener onto the breadboard with the correct ends next to each other and then smudge the contacts on the breadboard together between them with some solder? And then solder the wires onto the leads? (My former soldering experience consists solely of taking out and replacing pieces in my old DVD player to extend its life, so a lot of this is very new)
Everywhere that I see a T in a wire, do I just remove some insulation and solder the tip of a wire on the side of another?
My Voltage regulator's package shows ground in the middle and out and in on the outsides, but I don't see any sure sign of which way is up when I'm holding the thing in my hand. It has a metal area with a hole punched in it that isn't as thick as the rest of the block. Do I lay that "tab" face down to make it like the diagram?
I see one wire coming to each end of the buttons, but my buttons have 4 legs. What do I solder the legs to?
I see one places where two adjacents contacts (D2 and D3) on the iDuino are both getting fed by the same green wire. Is it fine to solder the wire to one of them and then smudge them together with solder? Is that just being sloppy?
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