The conventional way of displaying a character or text on a 16×2 LCD uses English alphabets. But with the concept presented here, it is possible to display Hindi alphabets as well. The idea is to create custom characters on a 5×8 pixel matrix element corresponding to Hindi letters. These letters once created can be invoked and displayed as and when desired by interfacing LCD with AT89C51. There are 8 symbol locations in LCD ” , the bitmap values are mapped to first base address location 64 (ASCII code 0).This is achieved by first sending the address location (64) to LCD command register. Next, the bitmap values (31, 4, 14, 21, 13, 4, 4, 0) are sent to the LCD data register.
Seven segment displays nowadays are commonly used in place of dot matrix display. They have found their use in places like microwave or fancy toaster oven or the same on washing machine but before using them in all these places you need to interface the 7 segment display with microcontroller or some more hardware will be required. But with the basic knowledge of 7 segments display you can use it in front of your shop or you can display your name on it. 7 segment displays numbers from 0 to 9 and some alphabets.7 segment display are labelled a to g and decimal point is usually known as DP. DP is the common point. In common cathode display they are connected to ground and rest pin are connected to supply. Similarly in common anode DP are connected to supply and rest are connected to ground. You can also use more than one display according to your requirement.