How to Build a Night Light Circuit Using an Arduino

In this project, we will go over how to build a night light circuit using an arduino. A night light circuit is a circuit which will turn on when nighttime comes, which is when it gets dark and the place could use some illumination. It is a common household device that is sold by pretty much all the major retailers. The device can sense when it gets dark and will switch on a light so that there can be some i ...

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How to Build a Color Sensor Circuit

In this project, we are going to build a color sensor circuit with an Arduino microcontroller. A color sensor is a device that can detect and differentiate between certain primary colors. This sensor can detect and differentiate between the colors white, blue, green, and red. <p ">A color sensor is actually a very useful device. Now in the age where autonomous vehicles are being developed that can run ...

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How to Build a Light Detector Circuit Using an Arduino

In this project, we will go over how to build a light detector circuit using an arduino. A light detector circuit is a circuit which can detect the presence or absence of light, depending on how we write our code to respond to the varying light levels. For example, if there is a great deal of light shining on our circuit, we can make anything that we want occur, such as have an LED light up. And we can do t ...

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How to Build an Infrared Proximity Switch Circuit Using an Arduino

In this project, we will build an infrared proximity switch circuit using an arduino. This is a circuit in which a switch activates when the infrared sensor detects an object in its proximity. The infrared proximity switch sensor is a reflection-type photoelectric snesor which sends and receives infrared beams. Infrared proximity switches work by sending out beams of invisible infrared light. A photodetecto ...

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How to Build a Simple Force Sensing Resistor (FSR) Circuit

In this article, we will go over how to connect a force sensing resistor, or force sensitive resistor, (FSR) to a circuit to build many different types of useful circuits with them. Force sensing resistors are variable resistors which change resistance according to the pressure or force applied to them. Under no force, the resistance is very high, pretty much infinite. When a light pressure is applied to th ...

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How to Connect a Microphone to an Arduino

In this project, we will go over how to connect a microphone to an arduino so that the arduino can detect whether there is sound in the environment or not. This circuit is only capable of detecting whether there is sound in the environment or not. It won't be able to record the words that you say, with the ability of being able to play it back. Or do things such as record music or play it back. The micropho ...

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Create an Applescript/Arduino Alert flag. using arduino

Have you ever felt like the mail sound on your Mac just wasn't enough? Simple sounds and alerts just don't cut it for you? You want something more apparent and rewarding? If so, this is the Instructable you've been looking for. In this Instructable, I'll show you how to hook up your Arduino to your Mac and throw up an actual flag when the alert of your choice occurs. In our example, we'll be doing an email ...

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How to Build a LM35 Temperature Sensor Circuit

In this project, we will demonstrate how to build temperature sensor circuit using a LM35 sensor. As a temperature sensor, the circuit will read the temperature of the surrounding environment and relay thi temperature to us back in degrees celsius. The IC we will use to measure the temperature is the LM35 IC. We will integrate this with the arduino to measure the temperature. The arduino will then read this ...

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How to Build a Vibration Motor Circuit

In this project, we will show how to build a vibration motor circuit. A vibration motor is a motor which vibrates when given sufficient power. It is a motor that literally shakes. It is very good for vibrating objects. It can be used in a number of devices for very practical purposes. For example, one of the most common items that vibrate are cell phones that vibrate when called when placed in vibration mod ...

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How to build an Arduino energy monitor – measuring mains voltage and current arduino

Including voltage measurement via AC-AC voltage adapter and current measurement via a CT sensor. This guide details how to build a simple electricity energy monitor on that can be used to measure how much electrical energy you use in your home. It measures voltage with an AC to AC power adapter and current with a clip on CT sensor, making the setup quite safe as no high voltage work is needed. The energy mo ...

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Soldering an SMT MOSFET Driver with a hotplate

Soldering SMD components isn't as hard as you might think. In fact it's easy. If you follow this instructables you'll soon see just what great results you can obtain at home using just a hotplate. It's not just being able to make small circuit boards that makes SMT soldering so good it's also a nicer way to solder. All the 'hard' work is in placing the components. You then only need to reflow the solder for ...

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An I²C Bus powered Arduino IO Expander Board controlled via Bluetooth and Android

Today we’ll expand Arduino’s digital resources thanks to an I2C bus equipped shield and we’ll allow the management of the board via a bluetooth connection RN-42 through an Android systems. All Arduino boards feature a number of digital I/Os. For the simplest projects, such resources are usually more than sufficient, but in those where they you need several control lines, “standard” I/Os can be less than eno ...

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