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With this instructables you learn how to interface an small lcd character display with a computer, which shows infos or whatever you want
What you need:
1. the display whit hd44780 chip
2. 10kohmTrimmer
3. 100ohm resistor
4. an old lpt cable
5. an usb cable
Tools:
1. soldering iron
2. 3rd hand
3. wires
What you need:
1. the display whit hd44780 chip
2. 10kohmTrimmer
3. 100ohm resistor
4. an old lpt cable
5. an usb cable
Tools:
1. soldering iron
2. 3rd hand
3. wires
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Signing UpStep 1Datasheet
Well the first thing you have to do is to search the lcd datasheet, most of the productor upload it in their sites, so you can search using google tipying the display code.. for example mine was CMC102001L01GBN... you can see an example of datasheet here here
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A good place to get The LCD's themselves is SparkFun Electronics, as seen HERE
Make sure that the one you're getting has a backlight, they come in handy.
It really doesn't matter what color you get, but Black on Green seems to be the color of choice, it's easy to see, not too flashy, and looks almost retro...
Also, watch your sizes, although they're on average $25 depending on size(20x4's are $20, 16x2's are 12) you wouldn't want to have to spend the extra $20 to get a new one after you realize that the one you got is too small for your liking.
Also, maybe invest in buying some form of a plastic housing, just an LCD screen on a desk isn't very appealing, it possesses alot of geek factor, but not appealing.
Whoa, my little "Comment" Here just explained more than the actual instructible :) anyways, that's all for now, quesitons can come in the form of replies to my comment :)