calculator by dislis

This sketch is missing a short description

Calculator

  • Part List

  • Arduino DuemilanoveArduino Duemilanove

  • 4X3 matrix keypad4X3 matrix keypad

  • LCD from DFROBOT LCD from DFROBOT

  • A sip array resistors (or 4 resistors) is pull up resistors connected to row pins of keypad with the common terminal connected to +5Vresistors

Connections

  • LCD DFROBOT

  • LCD RS pin to digital pin 9

  • LCD Enable pin to digital pin 8
  • LCD D4 pin to digital pin 7
  • LCD D5 pin to digital pin 6
  • LCD D6 pin to digital pin 5
  • LCD D7 pin to digital pin 4
  • LCD R/W pin to ground

  • 4x3 matrix key pad

  • rows pin out of key pad to digital pins 3, 2, 1, 0
  • colums pin out of key pad to digital pins 13, 12, 11

  • sip array resistors

  • 4 resistors as pull up resistors connected to rows pins (3,2,1,0)

Project ready

is a arduino calculator with Arduino Duemilanove , a LCD from DFrobot and A 4x3 keypad matrix the calculator precision is two decimal points the * key select the operation you want = ,+,-,*,/,decimal point,clear memory the # key is the enter key project

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