Category: Arduino Projects

Few day ago, I got an email from one of reader of bestengineeringprojects.com asking about how does the traffic police know the concentration of alcohol present in our breadth. For that purpose, I had designed a project called DIY Breathalyzer using various easily available electronics components. Before starting about description of project I would like to describe what breathalyzer is. The breathalyzer or breathalyzer is an electronic device which is used to estimate the concentration of alcohol available in breath sample. This device is usually carried by traffic police, medical…

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The project ‘Dark Sensor using Arduino’ uses an arduino board, a LDR and switching circuit. The circuit is basically a light operated circuit which operates when dark is detected on LDR. Circuit Diagram of Dark Sensor using Arduino. Circuit diagram of the projects ‘Dark Sensor using Arduino’ is shown in figure 1, build around a arduino uno board, a LDR, three transistors and few other electronics components. The LDR is basically a transducer which change one form of energy to another form (change in light intensity to change in resistance).…

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Basically, RGB represent three basic colour RED GREEN and BLUE which is used in our digital system for generation various other colour. The project ‘RGB Colour Generator using Arduino’ is basically a tutorial on how to generate colour code and hex code of that color. Circuit Description of RGB Colour Generator using Arduino The circuit of RGB colour generating using arduino is basically designed using a microcontroller unit (Arduino uno), a 16×2 alpha numeric LCD, a RGB LED and few resistor and variable resistor. The circuit diagram is shown in…

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The project ‘Soil Moisture Meter using Arduino’ uses arduino board, a 16×2 LCD module and soil moisture sensor in order to display the humidity (moisture) of soil. This project is very useful for farmer, floriculture, researchers etc. in order to know the moisture of soil at different stage. The working principle and circuit description is very simple that anymore can understand who have little knowledge of arduino board. The project is basically an interfacing circuit between arduino board with LCD and sensor. Previously, we had posted Greenhouse Automation System for easy, cost effective,…

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The project ‘Arduino VU Meter’ uses 16×2 alphanumeric LCD to display signal level of audio. Basically, VU Meter is used to represent volume of audio equipment. Previously we had posted a project Sound VU Meter using Arduino which uses LEDs to represent the level of volume where audio is taken from microphone. Unlike sound VU meter using arduino the project Arduino VU meter take input audio from two different channels i.e. left channel and right channel. Circuit Description of Arduino VU Meter The circuit of Arduino VU Meter is shown…

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The project “Arduino Fingerprint Sensor Lock” is simply fabricated around Arduino board. Not only to ensure door security, this project also make certain to assist in fields like forensics, crime investigation, personal identification, attendance system and there is a lot more. Introduction of Arduino Fingerprint Sensor Lock Recently, there has been recorded tremendous increase in the crime rate everywhere in the world. This issue is turning more severe every day. To get away with this problem, we decided to take help from technology and there this project “Arduino Fingerprint Sensor Lock”…

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Earthquake Detector using Arduino:- Circuit Diagram, working and circuit description with result and software code including library file of Earth Quake Detector They say, ‘Prevention is better than cure. This statement goes perfectly with the events whose probability of occurrence is highly possible. Earthquake is one such disaster that comes as an evil fate and sweeps away precious human lives and civilization, it is an unpredictable phenomenon whose occurrence cannot be avoided, but at least we can take measures to minimize the adverse effect of its consequences. In doing so,…

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