9/2/2023 0 Comments Arduino uno lcd datasheet![]() ![]() ![]() The value of that resistor depends on the the maximum backlight current and the typical backlight voltage drop, which should be listed in the LCD datasheet. You will need to have a current limiting resistor between the 5v rail and pin 15 of the LCD. This type of LCDs will have 14, or 16 pins, with pins 1-14 used to power and communicate with the LCD and pins 15 and 16 powering the optional backlight. After some poking around on the Internets, I confirmed that the drivers at the back of my “new” LCD were indeed compatible with the Hitachi one. The standard 14 pin female header on my LCD was a good sign. The LiquidCryslal Arduino library seemed like the place to start, but its description specifically mentioned that it works with LCDs based on the Hitachi HD44780 driver. The next thing to find out was how to hook this up to my Arduino Uno. On the back of the LCD I could see five KS00065B LCD Driver chips. The pins were helpfully labeled on the front of the panel (from 1 to 14). There was a ribbon cable attached to the LCD with a 14 pin female connector. Among some of the more promising salvaged components was a 40 x 2 character LCD. A couple of days ago I came across a discarded Meridian PBX phone and naturally, took it apart. ![]()
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