It's pretty obvious what LCDs do - they display information, but more importantly, they are the first step in creating interfaces that allows you to update operational parameters like pump run times and calibrate a pH probe without having to plug it back into a computer. These LCDs are great to add to an Arduino because there is a built-in library for interfacing with them, taking a huge burden off of the developer. This quick tutorial shows you how to wire up a basic 16 x 2 character LCD to an Arduino Uno and then display millis.
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| 16 x 2 Character LCD |
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