• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Need circuit help? Post them in the comments! I've answered over 50,000!

Blog | Categories | About | Contact | Calculators-online
You are here: Home / Archives for KeyPad

KeyPad

Password Security Lock Circuit Using 4×4 Keypad and Arduino

Last Updated on December 5, 2024 by Swagatam 5 Comments

P 20160905 014952

In this post I will show how to construct a password security lock circuit, which can be accessed by a 6-digit password. To be more precise it is alpha numeric password.   Hardware for this Project We are going to utilize 4×4 keypad, which consists of 0 to 9 decimal values, two special character ‘#’ […]

Filed Under: Arduino Projects Tagged With: 4x4, Arduino, KeyPad, Lock, Password, Security

How to Interface 4×4 Keypad with Arduino

Last Updated on December 5, 2024 by Swagatam 2 Comments

keypad

In this post I have explained how to interface a 4×4 keypad with Arduino. We are going to see what is a keypad, how it is constructed and a how to program the Arduino to receive keystrokes form the keypad and print them in serial monitor. What is a keypad? A keypad is a portable […]

Filed Under: Arduino Projects Tagged With: 4x4, Arduino, Interface, KeyPad

Arduino LCD KeyPad Shield (SKU: DFR0009) Datasheet

Last Updated on December 5, 2024 by Swagatam Leave a Comment

pindetails

The write up explains the pinout and working details of the LCD module “Arduino LCD KeyPad Shield (SKU: DFR0009)” which is specifically manufactured for offering a quick plug-in compatibility for all Arduino based applications which may require displaying a particular parameter in digits, such as temperature, speed, time, weight etc. Arduino LCD KeyPad Shield (SKU: […]

Filed Under: Arduino Projects, Datasheets and Components Tagged With: Arduino, DFR0009, KeyPad, LCD, Shield, SKU

Primary Sidebar

circuit simulator image

Subscribe to get New Circuits in your Email

Categories

  • Arduino Projects (89)
  • Audio and Amplifier Projects (132)
  • Automation Projects (17)
  • Automobile Electronics (101)
  • Battery Charger Circuits (83)
  • Datasheets and Components (106)
  • Electronics Theory (143)
  • Free Energy (37)
  • Games and Sports Projects (11)
  • Grid and 3-Phase (19)
  • Health related Projects (25)
  • Home Electrical Circuits (12)
  • Indicator Circuits (15)
  • Inverter Circuits (89)
  • Lamps and Lights (142)
  • Meters and Testers (71)
  • Mini Projects (46)
  • Motor Controller (64)
  • Oscillator Circuits (28)
  • Pets and Pests (15)
  • Power Supply Circuits (108)
  • Remote Control Circuits (50)
  • Security and Alarm (64)
  • Sensors and Detectors (102)
  • Solar Controller Circuits (59)
  • Temperature Controllers (42)
  • Timer and Delay Relay (49)
  • Transmitter Circuits (29)
  • Voltage Control and Protection (40)
  • Water Controller (36)

Other Links

  • Privacy Policy
  • Cookie Policy
  • Disclaimer
  • Copyright
  • Videos
  • Sitemap

People also Search

555 Circuits | 741 Circuits | LM324 Circuits | LM338 Circuits | 4017 Circuits | Ultrasonic Projects | SMPS Projects | Christmas Projects | MOSFETs | Radio Circuits | Laser Circuits | PIR Projects |

Social Profiles

  • Twitter
  • YouTube
  • Instagram
  • Pinterest
  • My Facebook-Page
  • Quora
  • Stack Exchange
  • Linkedin
  • Recent Comments

    • Swagatam on 4 Simple Li-Ion Battery Charger Circuits – Using LM317, NE555, LM324
    • eq on How to Make HHO Fuel Cell Circuit in Automobiles for better Fuel Efficiency
    • GIDEON MIGHTY on 4 Simple Li-Ion Battery Charger Circuits – Using LM317, NE555, LM324
    • Swagatam on How to Generate Free Electricity Using a Flywheel
    • Swagatam on PWM Inverter Using IC TL494 Circuit

    © 2025 · Swagatam Innovations