ps2 keyboard read display system

PS2 Keyboard read display systemProduct Overview

The operating voltage of PS2 Keyboard read display system is DC 5V. When

you press the keys of letters or numbers, the LCD1602 will display correspondingly

and also can control the size of the letters.The advantages of using PS2 keyboard

design are the automatic scanning, automatic identification, and automatic coding of

the keyboard. Only when you press the keys, the data will be sent out, which reduces

the burden of CPU. It is very convenient to use LCD1602 to display. It is a very

simple and low-cost analog keyboard display system.

Functions:

1.when you press the keys of letter or number only, the LCD1602 will display the

letter or number correspondingly.

2.when you press the keys of shift plus letter together,the LCD1602 will display the

capital letter.

Components List:

1.ICStation ATMEGA2560 Mega2560 R3 Board Compatible Arduino

http://www.icstation.com/product_info.php?products_id=3517

2.830 Point Solderless PCB Bread Board MB-102 Test DIY

http://www.icstation.com/product_info.php?products_id=1450

3.1602A HD44780 Character LCD Display Module LCM Blue Backlight

www.icstation.com/product_info.php?products_id=1419

4.PS2 keyboard

5.Breadboard Plug Wire Cable Tire

http://www.icstation.com/product_info.php?products_id=1437

6.Dupont 20cm Color Cable Line

http://www.icstation.com/product_info.php?products_id=3269

Hardware schematic diagram

The principle diagram of the hardware design

Hardware making graphic tutorials

Draw forth the power line and ground wire from ICStation Mega 2560 development board. And the red breadboard plug wire is the power line and black one is the ground

wire.

Draw forth the power line and ground wire from Mega 2560

Decompose 16 pins

Weld the pins which have been decomposed to LCD1602

Weld LCD1602

Put the welded LCD1602 into the bread board.

Connect the LCD1602 to the bread boardAccording to the schematic diagram,connect the pin 1 and pin 16 to the cathode and connect the pin 2 and pin 15 to the anode.The black represents cathode and the red

represents anode.

Connect the the cathode and anode to the public cathode and anode.

Place the slide rheostat

Connect the pin 1 of slide rheostat to the cathode and pin 3 to the anode, pin 2 to

connect the pin 3 of LCD 1602

pin diagram of slide rheostat

connection diagram of Slide rheostat

Note: By adjusting the slide rheostat to control the brightness of LCD

Connect the pin5 of 1602LCD to the ground。Connect the pin 4 and pin 6 of 1602LCD respectively to the pin12 and pin 11 of

ICStaion Mega 2560

Connect the pin 14、13、12、11 of 1602LCD respectively to the pin 5、4、3、2 of the

ICStation Mega 2560

Connect the 1602LCD to the Mega 2560

Connect the SDA port and SCL port of PS2 ports respectively to the pin 8、9 pf the

ICStation Mega 2560

schematic diagram of PS2 keyboard port

NC represent no connection

PS2 keyboard interface connection

Connect the port SDA and SCL of the PS2 keyboard to the ICStation Mega

According to the schematic diagram and PS2 keyboard port diagram, connect the

cathode and anode of the keyboard PS2 to the cathode and anode of breadboard.

Connect the PS2 keyboard to the bread board

Experimental Effect