Bluetooth Basics: How to Control an LED Using a SmartPhone and Arduino

Ever thought of controlling any of your electronic devices with your smart phone? How about a robot or any other device? Wouldn’t it be cool to control them with your smartphone? Here is a simple tutorial for interfacing an Android Smartphone with Arduino via Bluetooth! Required Materials Hardware Bluetooth Module HC 05/06 Arduino & Battery (with cable) LED 220Ω Resistor Android device Software Arduino ...

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BBC Micro Bit computer’s final design revealed

The device - which features a programmable array of red LED lights - includes two buttons and a built-in motion sensor that were not included in a prototype shown off in March. But another change means the product no longer has a slot for a thin battery. That may compromise its appeal as a wearable device. An add-on power pack, fitted with AA batteries, will be needed to use it as a standalone product. The ...

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ESP8266 Tutorial: Programming the Onboard GPIO Pins

The ESP8266 is a great tool for enabling your project to access the internet. You can plug it into an Arduino easily as shown and allow your project to communicate through the internet. Or even more exciting, to control it from anywhere in the world! The ESP8266 is a very low-cost module that comes pre-programmed with an AT command set firmware, meaning, you can simply hook this up to your Arduino device an ...

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LTC4015 – Multichemistry Buck Battery Charger Controller with Digital Telemetry System

Features Multichemistry Li-Ion/Polymer, LiFePO4, or Lead- Acid Battery Charger with Termination High Efficiency Synchronous Buck Battery Charger Digital Telemetry System Monitors VBAT, IBAT, RBAT,NTC Ratio (Battery Temperature), VIN, IIN, VSYSTEM, Die Temperature Coulomb Counter and Integrated 14-Bit ADC Wide Charging Input Voltage Range: 4.5V to 35V Wide Battery Voltage Range: Up to 35V Input Undervoltage ...

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Arduino Weather Station

How cool would it be to have your own Arduino weather station right in your backyard? Sounds fun? Geeky? Having your own weather station means that you don’t need any more inaccurate results from the weather channel! You can even log the data and play around with it. Set mood lighting according to the weather? Why not? This tutorial will get you kick-started with your own DIY Weather Box to chart out local ...

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An Android Reflow controller that anyone can build

Welcome to the never ending saga of Andy and his reflow controllers. About a year ago I published a project writeup showing how I built a PID-based reflow controller. It featured a 640×360 graphical LCD from the Sony U5 Vivaz mobile phone and was all-surface mount. It worked well and continues to serve me well to this day but I always thought that there were improvements that I could make in several areas. ...

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How to Make a Water Level Indicator with Arduino 6 11

Knowing the amount of water in an overhead tank can be one tedious task. Usually, you’ll end up climbing up the stairs to the tank and checking the level manually or you’ll you hear the water overflowing from the top. But these days electronic water level indicators are available to fix this problem, but they often come with a hefty price tag and are usually difficult to install. Most of the available syste ...

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USB Li-Ion battery charger

Li-ion cells become more and more popular due to their capacity and reasonable prices. In this entry I will show how to build a simple li-ion battery charger based on MCP73831 chip. It's a quite useful device for DYI projects,in addition its cost is only around 1,5 euro. The device uses USB port as a power supply (mini-USB connector). I use the standard gold-pins as an output socket. There're three of them, ...

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How to make a Smart Cane for the Visually Impaired with Arduino

I wanted to make something for them to help the visually impaired become independent, so I created an open source Arduino project for a Smart Cane. This Arduino smart cane can assist with walking alone in new environments by taking inputs through an obstacle sensor (ultrasonic sensor) and providing feedback to the person through haptics (vibration motor). Check out the video below for the demo and working. ...

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1Mbit SPI FRAM comes in chip-scale packaging

The 1Mbit SPI FRAM is in an 8-pin wafer level chip scale package (WL-CSP) which is an additional package variant to the existing product MB85RS1MT. In comparison to the industry standard SOP-8 package, the new WL-CSP package, which measures 3.09 x 2.28 x 0.33 mm, reduces the surface mounting area by 77%, and the device height by 80%. The WL-CSP package makes FRAM a non-volatile memory solution for wearable ...

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How to Make a Programmable Guitar Pedal With Arduino!

This DIY Guitar Pedal project is for guitarists, hackers, and programmers that want to learn about digital signal processing, effects, synthesizers, and experiment without deep knowledge of DSP, electronics, or hardcore programming. pedalSHIELD UNO is a lo-fi, programmable guitar pedal that works with the Arduino UNO/Genuino UNO boards and is Open Source & Open Hardware. Learn to create your own program ...

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Ultralow-power circuit improves efficiency of energy harvesting to more than 80 percent

The latest buzz in the information technology industry regards "the Internet of things"—the idea that vehicles, appliances, civil-engineering structures, manufacturing equipment, and even livestock would have their own embedded sensors that report information directly to networked servers, aiding with maintenance and the coordination of tasks. Realizing that vision, however, will require extremely low-power ...

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