Measuring PPM from MQ Gas Sensors using Arduino (MQ-137 Ammonia)

Right from the time of industrial age, we mankind have been rapidly developing. With every progress we also pollute our environment and eventually degrading it. Now global warming is an alarming threat and even the air that we breathe are getting critical. So air quality monitoring has also started to gain importance. So in this article we will learn how to use any MQ series gas sensor with Arduino and show ...

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Make your own gesture-controlled Wizard’s Walking Staff

Story This project uses the Arduino 101, a battery and an LED strip to make a gesture-controlled Wizard's Walking Staff. We'll define three different light-display "spells" you can summon by moving the staff in one of three gestures. Tech: The code uses the Inertial Measurement Unit in the Arduino 101 to read G-forces, but does not use the Pattern Matching Engine (for an example using the PME, check out Kit ...

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MorseCard – A Tiny Telegraph Station

Story Behold: the MorseCard! Fulfill your dreams of becoming a telegraph operator (or just make something cool to show your friends) with this weekend project. The MorseCard features a high-contrast OLED screen that will decipher whatever you tap out. I have written a variety of different sketches for the MorseCard, as the video above shows, that can do things like teach you Morse code, allow you to write o ...

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Starry Night Prom: How did I stand out at prom? In a light up dress of course!

About So for my Junior prom, I really wanted a dress I had seen online that was blue with a sequin ombre, but it was out of my price range, and way too voluminous. My mom and I had made my Homecoming dress the year before, so we decided we could tackle a prom dress, and after some internet surfing lead me to discover the Arduino had a sewable model, I was sold on the idea of making my prom dress. We stocked ...

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LedMatrix Tweet Visualization

Story Description Display tweets with a certain hashtag on a led-matrix using an Arduino/Genuino Yùn or Yùn-Shield. We will use a Python script to log into twitter and check for updates. Configuring the Yun101/YunShield In order to connect your board to internet you first have to configure some parameters. Open your Arduino IDE and go to example -> Bridge -> YunFirstConfig If you are using a YunShield ...

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Integrating Wiscore Alexa EVK and Arduino via Serial Port

Story Wiscore: Integrating Arduino with Alexa As part of the series of tutorials for the Wiscore Alexa AVS EVK, we will see how to integrate Arduino boards (Uno, Leonardo, Due etc) directly with Alexa Voice Service. The Wiscore board provides the means to communicate with other devices via the UARTs. We will in depth on how to enable one of the UARTs, connect an Arduino to the EVK and then communicate over ...

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Can I Use an Arduino Uno for This?

So back when I first started working with micro controllers, Arduinos mainly the most annoying this ever was when i would follow someones tutorial for a project and they would use the Arduino uno, I would be using the Arduino micro or something, i would spend like an hour wiring it up following the instructions piece by piece, get all excited to turn it on and as i do it just straight up doesn't work - the ...

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Reducing Arduino Power Consumption

Story When it comes to portable electronics, one of the most important features is how to maximize the battery life. The ATmega328P, used on popular boards like the SparkFun RedBoard, Arduino Uno, and Pro Mini are actually quite power hungry. The RedBoard and Arduino Uno, draw around 15mA minimum, which doesn’t sound like much but as you’ll see in this project, we can drastically bring that down with just a ...

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RPi Serial Console Automation Using Arduino

Story A Continuation of One Button Restart of a Stalled Raspberry Pi In a recent article, I showed how an Arduino Pro Micro can be utilized to send characters to the serial console of the Raspberry Pi Zero W. The Pro Micro was chosen because it is small, inexpensive, and easily acquired plus the integrated USB port provides a convenient way to easily upgrade the programming. (Always disconnect the ProMicro ...

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How to use the TFT display 2.2″ QVGA with Arduino

Story The main purpose of this project is to build a system based on chip ATMEGA328P, Arduino compatible, and interface it with a 2.2" QVGA TFT display using the library ILI9341. As an alternative to the self-build system you can use an Arduino Pro 3.3 V/ 8 MHz board or similar. This system works well and can be very useful for many applications, as data-loggers, graphic terminal, etc. A great advantage of ...

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Easy Serial on the ATtiny

Introduction The Atmel tinyAVR MCU's are great little chips for projects but can prove difficult to debug. Some ATtiny chips do not have direct support for hardware based serial and therefore the Serial object is unavailable in your code, however, it is easy to add a SoftwareSerial object and view output in the Arduino IDE. The code in this article uses an ATtiny85 with an FTDI Serial TTL-232 USB Cable to s ...

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Trinket Firmware Exorcism

Story Warning: Digispark uses Attiny85 PIN#1 as I/O - remove RESET button functionality Notes FOR ADVANCED USERS ONLY  The Trinket 5V and the Digispark share the same hardware design, right down to the LED being on PB1. Personally, I prefer the Trinket hardware over the Digispark, but the Digispark has a totally different ecosystem and is stackable, but for this article only the hardware design similarities ...

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