Create a Private Chat Room using Arduino, nRF24L01 and Processing

Creating a Local Network to share personnel and confidential data's has become almost impossible for a common man in our modern world. This is mainly because all common chat methods like Whatsapp, Facebook, Hangout and almost everything involves an internet connection. What if, we could share data without the medium of Internet? How cool it would be if you could communicate with people inside your home or w ...

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Automatic Door Open System With Vistor Counter Part-2 Using ARDUINO UNO R3

Hello welcome back . In previous part  we have made a visitor detector by using PIR sensor . This application can be used on night because PIR sensor gives output based on thermal object movement . In this tutorial we are going to extend that project with  visitor counter part . First of all i want to apologize that I am unable to  add seven segment without adding extra IC  as promished, it’s because we are ...

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Elektor 500ppm LCR meter case tips

I recently bought a 500ppm LCR meter from Elektor because I didn't have anything for measuring inductors or the ESR (equivalent series resistance) of capacitors, both of which are important for modern electronics, particularly switch mode regulators that have become ubiquitous. It is also more accurate than any of my multimeters and has wider measurement ranges. For example it can measure resistance from 0. ...

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Smart Phone Controlled FM Radio using Arduino and Processing

In this project we will use an existing FM radio which went repair a long time ago, to convert it into a Smart Wireless FM Radio controlled using Phone, with the help of Arduino and Processing. We can convert any manually operated electronic device into a Smart Device using the same procedure.  Every electronic device operates with the help of signals. These signals might be in terms of voltages or currents ...

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WATER LEVEL MEASUREMENT USING ARDUINO UNO R3 AND WATER SENSORS

Hello , Welcome back , In this tutorial we are going to show you how to make a water level indicator using arduino uno and some water sensors . There are so many tutorial on water level sensors on internet , but this method is some thing different than other . First of all let us discuss about component we need to make water level indicator and controller. Component required to make water level indicator . ...

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Measure small LCs with a scope

One of our technicians recently asked for help determining the value of an SMT inductor. It was unmarked, and was many turns of very fine wire on a ferrite core. The resistance measured 26Ω, which for some reason gave our ancient LCR bridge a conniption, and read 30mH along with a blinking error message. The tech rightfully felt that such a small inductor could not possibly be 30mH. I didn't have another br ...

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Door Alarm using Arduino and Ultrasonic Sensor

Security has always been a major concern for all of us and there are many Hi tech and IoT based security and surveillance system are available in the market. Intruder or Burglar Alarm is one of the classic and popular project among the Electronics students and hobbyists. We have also built many Burglar Alarms based on various technologies: Laser Security Alarm Circuit IR Based Security Alarm Burglar Alarm u ...

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Real Time Home Automation Using Arduino Uno R3 and DS1307 RTC (Part-1)

Hello every one , welcome back .  In this new arduino tutorial series I’m gonna show you how to control every thing in your home on time basis . After doing this project you will be able to control your home appiliences like TV , Radio,Fan, and other thing on time basis . Let’s say you want to switch on TV exactly on 8 ‘O clock morning  and fan on 12 PM and so on ,, This is on going series and will be updat ...

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Nanocounter: Frequency Counter with an Android Interface

Here we have a good example of how a requirement for a simple tool spirals out of control and spawns a project that takes months to complete and ends up dwarfing the project that it was originally expected to facilitate. You see, some time ago I was fiddling around with a project, something to do with data logging, probably, I’ve actually forgotten what I was up to. Said project would have used an MCU to ac ...

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0-24v 3A Variable Power Supply using LM338

Batteries are generally used to power up the Electronic Circuit and Projects, as they are easily available and can be connected easily. But they drained off quickly and then we need new batteries, also these batteries cannot provide high current to drive a powerful motor. So to solve these problems, today we are designing our own Variable Power Supply which will provide Regulated DC voltage ranging from 0 t ...

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Connecting multiple I2C device on Arduino Uno R3

Hello every one ! welcome back ! It’s nice to show you my new tutorial after long time .Today we will learn how to connect multiple I2C device (typically for demo temperature sensor ) to the Arduino Uno .I recommend download datasheet of that I2C device you are going to interface with Arduino before jump into coding. I2C communication Protocal I²C (also referred as IIC or TWI ) pronounced as I square C is w ...

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9V to 1kV DC/DC converter

Currently I'm working on a device to electrocute home insects like cockroaches, progress is small because they are smarter than I thought, but that's a different story. For that project I had to find a source of sufficient high voltage and output power. Presented in previous post 5V/400V converter had insufficient voltage and power, another option, flyback transformer was too dangerous to be used here. Fina ...

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