Simple Android Bluetooth Application with Arduino Example

This article will detail how to make a simple bluetooth application using Android Studio and demo it using an Arduino to toggle an LED and send data back-and-forth. No prior knowledge of Android development is needed, however it will help to know some basics of Java programming. I will be using an Android phone for testing purposes and not an Android virtual device. The Android app that you develop can be u ...

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Estação Meteorológica – Weather Station

O facto de ter uma CNC disponível em casa deu-me liberdade para contruir mais facilmente e rápidamente peças que antes demorariam algum tempo a fabricar e que muito provavelmente não iriam ficar tão perfeitas. Isto fez com que novas ideias que me surgissem fossem mais facilmente postas em prática. Esta foi uma dessas ideias e que nasceu apenas pela vontade de construir uma pequena réplica de uma máquina de ...

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Arduino DC-DC Boost Converter Design Circuit with Control Loop

This post will cover how to use an Arduino Uno to easily control a 10W+ boost converter. A discrete boost converter can be built by using just a few parts, namely an inductor, capacitor, diode, and a FET. Please see the Wikipedia page for how the circuit works. It works off of the premise that an inductor will store energy in its magnetic field and then when it collapses (switch opens), it will resist the c ...

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Arduino Line Tracking Robot Car

This line tracking robot car was built base on the prototype mentioned in the previous knowledge item. You can find the details for the prototype: http://www.rs-online.com/designspark/electronics/eng/knowledge-item/arduino-line-tracking-robot-car-prototype Bills of Materials: PCB   Geared Motor OSRAM Opto Semiconductors Photodiode (RS stock number: 654-8902) Nichia LED (RS stock number: 713-3996) RS 10 ...

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Arduino Stepper Motors

When we need precision and repeatability, a stepper motor is always the solution. With the way it is designed, a stepper can only move from one step to the next and fix in that position. A typical motor has 200 steps per revolution; if we tell the motor to go 100 steps in one direction, it will turn exactly 180 degrees. It gets interesting when we only tell it to go one step and it turns exactly 1.8 degrees ...

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Arduino Stepper Motors

When we need precision and repeatability, a stepper motor is always the solution. With the way it is designed, a stepper can only move from one step to the next and fix in that position. A typical motor has 200 steps per revolution; if we tell the motor to go 100 steps in one direction, it will turn exactly 180 degrees. It gets interesting when we only tell it to go one step and it turns exactly 1.8 degrees ...

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Johnny 6 is alive!

Designing a custom plate for the Arduino Robot, adding jumbo LEDs and displaying readings from an ultrasonic distance sensor to the LCD. My previous post on the Arduino Robot described how I took the Runaway Robot sketch and modified it work with the PING ultrasonic distance sensor. This post is still based around the same example sketch, however the code was not only further modified but additional compone ...

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Developing your own Flowcode 7 controlled weather station

This project details a Flowcode and E-blocks based weather station capable of reading local temperature and humidity with 2 remote thermo-hygrometer sensors. The local board also incorporates a real time clock. This article has been contributed by Flowcode user John Crow. Flowcode can be downloaded and trialled for free at the Matrix Technology Solutions website. You can also purchase Flowcode licences thro ...

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Designing and building a coffee table

For a number of years, my colleague Andrew has had an old IBM mainframe CPU kept in storage, waiting to be transformed into something new. Hailing from a long-lost era of computing (the system in which this module was used was the 4381, first announced in 1983) – this is a far cry from what we might think of as a CPU today. It weighs approximately 20-30kg, and measures around 700mm x 650mm x 130mm! With suc ...

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Soldering Station

At the fpv-community.de Forum I read about a DIY Weller station designed by Martin Kumm. Basically an Arduino shield to drive a Weller soldering tip. As there is not much to it, the board simply contains an precision OpAmp, a power MOSFET, 2 buttons for adjusting the temperature and a display to show the current values. This design looks like a good starting point for my own advanced project. As I have late ...

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How to build an Arduino Robocar Part 1

I've been meaning to put some content on here for a while and recently I got around to getting an Uno and motor shield. Given I also have access to a 3d printer and have a shedload of microswitches, semis and other goodies knocking around - Robocar is an obvious choice! I've had a few Arduino's in the past but have always used them as an ISP to write to AVR instead of just embracing the Arduino eco-system. ...

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Old Sole

ld Sole interrupts normal youthful days to force young people to interact with their environment in a different way. If the young shoe-wearer takes significantly more steps than the elderly individual with the walker, the shoes light up and vibrate uncomfortably, reminding the young person that somebody on the other end of the old sole is not able to keep up. Limiting the speed of the shoes to the speed of ...

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