Use PHP and MySQL to control a machine that will retrieve parts so you no longer have to dig for that 330 ohm resistor!
Project tutorial by Arduino “having11” Guy
Make your own simple polar CNC drawing machine.
Project showcase by Sandeep Sharma
This is a beginner project in which we'll be lighting fireworks using
a Bluetooth enabled phone.
Project tutorial by danionescu
Interesting. I'm also working on a similar project, but there's a problem: having to manually wind the wire around the firework fuse (which are quite slippery and is pretty difficult) or a match head. I didn't use nichrome, though, I used plain copper wire, which also seems to work fine and it's all I have currently, though it requires more current.
This project doesn't use any analog pins, so no AREF as well. It's not very accurate, but it works. And AREF is just for getting more accuracy or resolution, it's not an important pin for your project. You can also connect it directly to an analog pin, no problem.
It has no purpose. Apparently, the author made a mistake. In fact, that looks suspiciously similar to an end-of-comment line, so I think he based his program in an example since examples usually start with a long comment stating author, revisions and licensing information, and accidentally copied that line.
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