June 2016
Intermediate to advanced
272 pages
5h 4m
English
Content preview from Arduino Project Handbook
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Project 22: Keypad Entry System
It’s time to introduce a keypad to your Arduino by building a keypad entry system.
PARTS REQUIRED
• Arduino board
• Breadboard
• Jumper wires
• Tower Pro SG90 9g servomotor
• Green LED
• Red LED
• 4×4 membrane keypad
• 2 220-ohm resistors
LIBRARIES REQUIRED
• Keypad
• Servo
• Password
This project uses a 4×4 membrane keypad with a ribbon of eight wires running from the bottom, connected to a servo that sweeps to open a lock.
HOW IT WORKS
A keypad is basically a series of buttons that output a number or character ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.