Project tutorial
Keypad 3*4 with Single Wire Library

Keypad 3*4 with Single Wire Library © GPL3+

Allows an Arduino board to deal with keypad 3 * 4 using one wire.

  • 518 views
  • 5 comments
  • 4 respects

Components and supplies

About this project

If you are using a 3*4 keypad, of course you bothered from 7 wires to deal with it.

https://github.com/kaaoda/Keypad-Arduino-1-wire

By this library, you will be able to interface it by single wire connected to one analog pin.

the default network resistors is 5Ks for rows and 2Ks for columns.

you can change it and declare that in constructor.

pass analogRead value to function: char button_content(float analog), it will return character pressed in char data type.

NOTE!: don't use different resistors values in rows or columns.

Schematics

capture_3IvBVzPWmR.PNG
Capture 3ivbvzpwmr

Comments

Similar projects you might like

Arduino Keyless Door Lock System with Keypad and LCD

Project tutorial by DIY Hacking

  • 26,383 views
  • 19 comments
  • 54 respects

Keypad operated door lock

Project tutorial by andrea

  • 5,930 views
  • 2 comments
  • 7 respects

Guess the Number with Arduino KeyPad

Project tutorial by Giovanni Gentile

  • 3,556 views
  • 3 comments
  • 3 respects

Keypad Entry Lock

Project in progress by 3 developers

  • 2,875 views
  • 0 comments
  • 11 respects

Only Three Pins for a 4x3 Keypad

Project tutorial by Giovanni Carrera

  • 3,243 views
  • 3 comments
  • 13 respects

Using 4×4 Keypad With Arduino

by Techmirtz

  • 31,841 views
  • 6 comments
  • 34 respects
Add projectSign up / Login