Connect the +LED pin of the LCD to the +ve supply using a resistor. If you want to light up the back light, connect the –LED pin to ground. Connect the middle pin of the pot to pin3 of LCD module. Connect a Pot (2 to 5 K Ohm) across the supply and ground. Connect pin 1 of the LCD module to ground, pin 2 to +ve supply. In addition we need 2 bit control bus for write only mode or 3 bit control bus for Read plus write mode. Here to interface LCD with Avr, an 8 bit data bus is required. Towards the end you can see the real life display as an image where I displayed characters “Circuits Today” □ ![]() I have added two circuits in this post 1) Interfacing LCD with Avr Atmega8 and 2) Interfacing with Atmega32. ![]() Let us see the 8bit mode interfacing of the LCD display with an AVR micro controller first. Now let us come to the interfacing side of LCD. You can read the Note on character LCD Displayhere. I’ve already discussed about the LCD display in a note here in this website.
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