Yes, I realize that there is an entire library of Arduino code that does this with a lot less coding. Using the Arduino, we're going to replace the physical switches with the basic Arduino commands digitalWrite and delay. That's exactly what RC Tractor Guy demonstrates in his video. In my last post, I explained that programming the Hitachi LCD is nothing more than connecting certain inputs to either ground or +5V, then connecting the EN line to +5V, then back to ground. I want to start from the beginning and take this a single step at a time. I have an Arduino Uno (that has an Ethernet shield mounted on top) to do just that. I'm going to use an Arduino to do just that. This means you need something that you can change more easily. It would also be time-consuming to make any changes to the LCD display. Frankly, it explains things a lot better than I do.Īs you might have guessed, it would take a looooooong time to use such a basic circuit to program an LCD. I'll even point you towards a video tutorial by RC Tractor Guy that actually demonstrates how you can use simple switches to program the LCD. In my previous article, I walked through how tying the various connections on the LCD between ground (GND) and +5V would program the LCD to display pretty much anything you wanted. Understanding the LCM1602C LCD Display: Programming with the Arduino, Part 1
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