Get Sensor Data From Arduino To Smartphone Via Bluetooth

Hariharan Mathavan at allaboutcircuits.com designed a project on using Bluetooth to communicate with an Arduino. Bluetooth is one of the most popular wireless communication technologies because of its low power consumption, low cost and a light stack but provides a good range. In this project, data from a DHT-11 sensor is collected by an Arduino and then transmitted to a smartphone via Bluetooth. Required P ...

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Real Time Clock and Temperature Monitor using DS3231 Module

Hi guys welcome to this tutorial. One of the most important thing everyone wants to keep track of daily is, time and with easy to use platforms like the arduino it is very easy to create your own timepiece and in the case of this tutorial add a temperature monitor to it. For this tutorial, we will be creating a real time clock and temperature monitor using the simple and easy to use DS3231 module. Introduct ...

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Internet connected smart humidifier

I worked on creating a Internet connected last week using my open source WiFi relay project as platform. We observe quite dry air at our house, I suspect this is due to the fact that we use fan coils for heating/cooling. Humidity levels at home are usually below the 30% mark, which poses a health risk along with uncomfortably dry air. I’ve found these interesting charts that got me convinced I need to do so ...

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PERFECT CHEESE EVERY TIME WITH THIS TEMPERATURE CONTROLLER

Anyone who is from a background in which cheesemaking is a feature will tell you that it is an exact science in which small differences in parameters can make a huge difference in the resulting cheese, to the extent that entire batches can be rendered inedible. In particular the temperature at which the milk is held can be crucial to the production of individual styles of cheese. A friend of [William Dudley ...

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1Amp Constant Current LED Driver Shield for Arduino Nano

1A Constant current LED driver shield for Arduino Nano has been designed for verity of LED related applications. The shield provides accurate LED current sink to regulate LED current in a string of LEDs or single LED. The LED current is mirrored from the current flowing from the RSET Preset PR1. On board 1W LED is used for testing purpose. External high Wattage LED or multiple LED string can be connected by ...

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With the WIZ550WEB module you’re immediately on the web

To administrate devices through a web interface is simple, fast and comfortable. Also can be added, that it´s a solution that saves time and money and in a vast majority of cases it´s beneficial for a producer and also a customer. Besides common “network devices” for example for data acquisition (telemetry – when we want a device to send measured data), a network connectivity is still more used at devices, ...

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High-speed comparator cuts delays to 2.9 ns

Features Very High Toggle Rate: 280MHz Low Propagation Delay: 2.9ns Rail-to-Rail Inputs Extend Beyond Both Rails Output Current Capability: ±22mA Low Quiescent Current: 4.5mA Features within the LTC6752 Family: 2.45V to 5.25V Input Supply and 1.71V to 3.5V Output Supply (Separate Supply Option) 2.45V to 3.5V Supply (Single Supply Option) Shutdown Pin for Reduced Power Output Latch and Adjustable Hysteresis ...

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Newly Developed Internal Temperature Sensor For Li-ion Battery Enables 5x Faster Charging

Researchers at the University of Warwick in the UK have developed sensors which measure the internal temperature and electrode potential of Lithium batteries. The technology is being developed by the Warwick Manufacturing Group (WMG) as a part of a battery’s normal operation. More intense testings have been done on standard commercially available automotive battery cells. If a battery overheats it becomes a ...

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PING-PONG BALL MAKES GREAT PID EXAMPLE

It is a common situation in electronics to have a control loop, that is some sort of feedback that drives the input to a system such as a motor or a heater based upon a sensor to measure something like position or temperature. You’ll have a set point — whatever you want the sensor to read — and your job is to adjust the driving thing to make the sensor read the set point value. This seems easy, right? It do ...

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A Heat Switch for Controlling Heat Flow Path in Electronic Systems

A switch is a fundamental part of most electrical and mechanical devices; mechanical switches can be used to select gears in a car’s transmission or used to unlock a door; electrical switches can turn the lights in a room on and off;  semiconductor uses to route logic signals within a circuit or control bigger devices. But what about heat flows? Can we possibly control the route of heat in a device? A Therm ...

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HIGH PRECISION ANALOG IO WITH DIGITAL PINS

Reading the temperature of your environment is pretty easy right? A quick search suggests the utterly ubiquitous DHT11, which speaks a well documented protocol and has libraries for every conceivable microcontroller and platform. Plug that into your Arduino and boom, temperature (and humidity!) readings. But the simple solution doesn’t hit every need, sometimes things need to get more esoteric. For years we ...

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DIY Internet connected smart humidifier

I worked on creating a Internet connected worked on creating a Internet connected last week using my open source WiFi relay project as platform. We observe quite dry air at our house, I suspect this is due to the fact that we use fan coils for heating/cooling. Humidity levels at home are usually below the 30% mark, which poses a health risk along with uncomfortably dry air. I’ve found these interesting char ...

Read more
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