Theres a few vague/uncovered parts in the guide that I'm a little unclear of, and I don't want to mess things up. I really don't know what I'm doing, I'm just following the tutorial to learn.
1. If I'm using a 9v battery, I need at least an 18v capacitor right?
2. Anyone know a store I can buy a serial-to-USB adapter from? I could just plug it into my desktop, but I would much prefer to use my laptop. I checked office max, best buy, and radio shack (online.)
That's the multimeter I have. I'm not sure where it's from or anything, I just found it in my dad's garage. I read the manual, and found out from it to test the resistance (for the photo resistors), I use this section.
But which number should I use? Also, when I turn the multimeter on it displays "1". When I put the prongs to the prongs of the photocell, it cycles through a few numbers 500-900 for a few seconds, then just displays 1 again until I take the prongs off and put them back on.
4. Also, anyone know where I can buy the little thing to connect a 9v battery to?
5. I have seen websites to buy HDPE from, but does anyone know a store that sells it? Like home depot, etc.