Consumer Electronics: Arduino

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How to Make an Instrument with the Arduino

The Arduino allows you to go beyond playing a sound — you create your own instrument, similar to the Theremin. The Theremin, named after its inventor Léon Theremin, was one of the first electronic instruments [more…]

How to Calibrate Your Inputs with the Arduino

Think of calibrating your circuit as setting the thermostat in your home. By calibrating the sensors on your Arduino project, you can tailor the sensor to its location. In this example, you learn how to [more…]

What You Should Know about Arduino Pressure, Force, and Load Sensors

Three closely related kinds of Arduino sensors are commonly confused: pressure, force, and load sensors. These three sensors are actually extremely different in how they behave and what data they can give [more…]

What You Should Know about Lasers for the Arduino

Laser trip wires are made up of two parts, a laser light source and a light sensor. With an Arduino, you can make a laser trip wire very simply and trigger anything you want from it. As you know from the [more…]

How to Detect Movement with the Arduino

A Passive Infrared (PIR) sensor is a common sensor in some homes and most commercial buildings and allows you to detect movement with the Arduino. You may have seen this sensor in the corner of a room, [more…]

How to Measure Distance with the Arduino

Two sensors for measuring distance with the Arduino are extremely popular: the infrared proximity sensor and the ultrasonic range finder. They work in similar ways and achieve pretty much the same thing [more…]

How to Make a Virtual Button with the Arduino

You will learn how to make an onscreen button in Processing that affects a physical LED on your Arduino. This is a great sketch to get started with interactions between computers and the real world, and [more…]

How to Send Multiple Signals from the Arduino to Processing

The only thing better than sending signals to Processing is sending multiple signals, right? Sending multiple signals is often a stumbling block, though, because although sending values from multiple sensors [more…]

Which Arduino Do You Need for Your Project?

The Arduino project has come a long way in only a few years. It started out with just a single simple board that offered basic features and did not have a USB connector. You can now find over a dozen Arduino [more…]

What You Need for an Arduino Clock Project

If you want to keep accurate time on an Arduino project, you need a real-time clock of some kind. The Arduino can keep track of time very accurately by using the [more…]

How to Assemble the RTC module for Your Arduino Clock Project

Assembling the RTC module for the Arduino Clock Project is fairly simple, if you have some experience soldering. If not, it’s a good opportunity to practice your skills. After the kit is assembled, you [more…]

How to Add and Test the LCD Display for Your Arduino Clock Project

Once you’ve programmed and tested the beating heart of your Arduino clock, you need a way to display the time without using the serial monitor. This is where the LCD display comes in. [more…]

How to Display the Time for Your Arduino Clock Project

Once you’ve got something on the display for your Arduino Clock Project, it’s time to read the time from the RTC module and display it. Later, you add buttons to program the alarm, and a switch to change [more…]

How to Add a Switch and Input Buttons to Your Arduino Clock Project

For your Arduino Clock Project, you first add one of the pushbutton switches and one of the resistors, which you use as an input to increment the alarm hours. The pushbutton works by allowing +5V to be [more…]

How to Add an Alarm to Your Arduino Clock Project

Adding an alarm is the easiest hardware modification for your Arduino Clock Project. You only need to attach the piezoelectric sounder. With that added, you simply create a function to play the alarm. [more…]

What You Need for a Keypad Entry System Arduino Project

No self-respecting mastermind would leave his fortress unsecured against intruders. These Arduino project steps guide you through building a keypad entry system that unlocks a door when you enter the correct [more…]

How to Prototype a Keypad and Display for Your Keypad Entry System Arduino Project

This Arduino project has a lot of connections, so it’s a good idea to prototype it first using a breadboard. After you’ve built and tested your prototype, you can then install the breadboard into an enclosure [more…]

How to Declare Variables to Code the Keypad for Your Keypad Entry System Arduino Project

Once you’ve got the keypad and display components in place on your breadboard, it’s time to load up the code to your Arduino. Take a moment to look at the code and then upload it to your board. [more…]

How to Define the Setup for Your Keypad Entry System Arduino Project

After you have put all the pieves together for your Arduino Keypad Entry System Project, you need to define the setup. In the setup() section of your code, you prepare the Arduino to run this sketch. [more…]

How to Run the Main Loop for Your Keypad Entry System Arduino Project

You will need to run a main loop for your keypad entry system Arduino project. There are only a few things the code does to operate your entry system. The main loop operates as follows: [more…]

How to Specify User-Defined Functions for Your Keypad Entry System Arduino Project

The final part of the code for your keypad entry system Arduino project contains four functions that handle identifying the key pressed, sending commands to the Max chip, clearing the display, and activating [more…]

How to Add and Test the Relay for Your Keypad Entry System Arduino Project

Once the code has been added to your Arduino, you now need to add the relay that controls the door mechanism and the power supply. You use the same power supply to operate your Arduino, because it won’t [more…]

How to Assemble and Install Your Keypad Entry System Arduino Project

When you put the keypad entry system Arduino project into the enclosure, you might want to transfer the circuit to a half-size breadboard that takes up less space and accommodates the Max72xx driver, transistor [more…]

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