Tag - Keypad

Calculator using Arduino Uno - Project

Calculator using Arduino Uno

Arduino Uno has always helped to build projects easily and make them look more attractive. In this project, we are going to make an Arduino Uno calculator which will take the values from user by using the 4X4 keypad and then will perform the calculations to get the result. After calculating the result, it will print those calculated values on Nokia 5110 LCD. This Arduino Uno based calculator can perform four operations which are addition, subtraction, multiplication and division. Components RequiredArduino [...]

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Digital Door Lock using Arduino

Digital Door Lock using Arduino

As thefts are increasing day by day security is becoming a major concern nowadays. In this project we will make a digital door lock system with keypad using Arduino Uno. It will open your door only when the right password is entered and it will start beeping when a wrong password is entered. Components Required4×4 keypad LCD Arduino Uno Push Pull Solenoid TIP 120 NPN transistor Power Supply Breadboard 1KΩ, 220Ω Resistor 10KΩ Potentiometer Buzzer Connecting wiresCircuit Diagram & Explanation Digital Door Lock using Arduino – Circuit Diagram First of all, we will [...]

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keypad

Interfacing Keypad with 8051 Microcontroller using Keil C

Matrix Keypad Matrix Keypads are commonly used in calculators, telephones etc where a number of input switches are required. We know that matrix keypad is made by arranging push button switches in row and columns. In the straight forward way to connect a 4×4 keypad (16 switches) to a microcontroller we need 16 inputs pins. But by connecting switches in the following way we can read the status of each switch using 8 pins of the microcontroller. 4×4-Matrix-Keypad The status of each [...]

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