Electronic number game circuit is an interesting game for children and elders or you can play with your friends. In this you have to perform mathematical operation like addition, subtraction, multiplication, division and in the end the person who has the highest score will win the game. So you can also play this game with your children and teach them the mathematical operation very easily and interestingly. There is no limit on the number of person who can play this game. Important feature of this circuit is it will display the number on 7 segment display so you can easily see the number on display easily. And it will hold the display until you have held the touch to stop wire. Keep on reading to find out how the circuit is assembled and how it works.

 LCD is a very commonly used output device to display alphanumeric characters. The LCD displays the character corresponding to the data received on its input [[wysiwyg_imageupload::]]data port i.e., it treats the data as the ASCII value of the character to be displayed. So if the value 65 is given to its data port the character “A” will be displayed and if the value 49 is given to the LCD the numeric digit “1” will be displayed.  At many instances it is required to display a number like 123 on LCD. Displaying this number is tricky. If the data port of the LCD is loaded with the number 123, then the character corresponding to it will be displayed. This article shows the concepts behind displaying a number on LCD.The article uses 8051 microcontroller (AT89C51) to demonstrate the above principle. The circuit is divided into two units: the controller unit and the display unit. The controller unit consists of a microcontroller circuit. The microcontroller used here is AT89C51 (for details of controller circuit, refer ‘led blinking’ section).