Keypad

A keypad is a set of buttons arranged in a block or "pad" which bear digits, symbols or alphabetical letters. Pads mostly containing numbers are called a numeric keypad. Numeric keypads are found on alphanumeric keyboards and on other devices which require mainly numeric input such as calculators, push-button telephones, vending machines, ATMs, Point of Sale devices, combination locks, and digital door locks. Many devices follow the E.161 standard for their arrangement.

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A Safe for Valuable Things

“Firstly, I need a safe to put my money in. Chinese New Year is coming. I will get red envelopes from my great-grandma, grandparents, great-uncles, great-aunts, uncles, and aunts. I need a safe to store my money. I can also …

Arduino SpeedMath Game

“SpeedMath Game is a fun way to test your abilities at how fast you can do math in your head both visually and auditorily. This has been the first time I have ever created an Arduino project and it has …

Smart Coin Feeder

“Retrive coins the old way pushing buttons or the future way through Alexa or any voice assistant. This is another “Thing” I made inspired in my previous project Cuckoo IR Alexa exploring the home automation with the combo ” Alexa and …

Keypad Garage Opener

“Replaced a bad keypad on the outside of my garage door. Keypad to open garage door. Password can be changed through the keypad and is saved to EEPROM. Changing the password requires knowing the saved password. See code for instructions …

Payment Terminal for the Visually Challenged

“Aim of this project is to improve the experience of the visually challenged, while making cashless transactions in public. What is a payment terminal?A point of sale terminal (POS terminal) is an electronic device used to process card payments …

Arduino Psychic

“This is a magic trick done using two Arduinos. One Arduino is a random# generator, the other Arduino will identify a random # chosen by the audience. Please watch the video. It’s easier shown than explained. :-( Supplies: Any two Arduinos …

Arduino Mechanical Keypad

“I needed a pin pad for another project, so I decided to make a keypad with parts I had at home. Supplies: 1u Keycaps: 1 to 9 DELETE 2u Keycaps: 0 ENTER 12 key switches (I used Cherry yellows but …

Connect 4 Playing Machine

“A 3D printed machine controlled by an Arduino that plays Connect 4. These instructions describe the making, assembly and workings of a Connect 4 game created for use with an Arduino microcontroller. The game consists of a purchased game board …

Universal Touch-Free Keypad Adaptor for Existing Keypads

“A device that mounts on top of a traditional keypad and transforms it into a touch-free and bluetooth controllable one. Nowadays we are all facing the Covid-19 pandemic; we know that there are multiple ways to get infected and one …

How to Make Arduino Calculator With LCD Display

“In this post, I tried to make an Arduino Calculator very easily using Arduino Uno R3. The values can be sent in through a keypad (44 keypad) and the result can be viewed on an LCD screen. This calculator could …