Planet Arduino

by indigod0g @ instructables.com:

In this project, we will be making a mini weather station that measures temperature and humidity and transmits them wirelessly to a ground station, which displays the readings on an LCD display!

It’s a fairly easy project and can be used either on its own or part of something bigger.

Mini weather station – [Link]

An Arduino Uno appeared at The Tonight Show thanks to a project called Wildfire Warning System created by a 14 years old girl from California. Take a look at the video to discover how  you can detect fires  using a gas sensor and a temperature sensor.

And guess what? Jimmy Fallon knows what an Arduino is! Watch the video:

by Mahesh Venkitachalam:

I was in Bhutan last December, and as we travelled to different locations, I kept wondering what the temperature and altitude was, and wished I had some gizmo that would show me these values. Back home, I did a bit of research on altitude sensors, and one that came up was the cheap BMP180 sensor. It measures temperature and pressure, and the latter can be used to calculate the altitude. It’s been lying around with me the past few months, and now I’ve finally gotten around to building a display around it.

Temperature / Altitude / Pressure Display using BMP180 - [Link]

During a recent trip to Bhutan, [electronut] wished for a device that would show the temperature and altitude at the various places he visited in the Kingdom. Back home after his trip, he built this simple Temperature, Altitude and Pressure Display Device using a few off the shelf parts.

Following a brief search, he zeroed in on the BMP 180 sensor which can measure temperature and pressure, and which is available in a break-out board format from many sources. He calculates altitude based on pressure. The main parts are an Arduino Pro Mini clone, a BMP180 sensor and a Nokia 5110 LCD module. A standard 9V battery supplies juice to the device. A push button interface allows him to read the current parameters when pressed, thus conserving battery life.

Standard libraries allow him to interface the LCD and sensor easily to the Arduino. He wrapped it all up by enclosing the hardware in a custom laser cut acrylic box. The result is bigger than he would like it to be, so maybe the next iteration would use a custom PCB and a LiPo battery to shrink it in size. While at it, we think it would be nice to add a RTC and some sort of logging capability to the device so it can store data for future analysis. The schematic, code and enclosure drawing are available via his Github repository.

by Francesco Truzzi :

Some time ago I came across a new chip from TI, the HDC1000. It’s a temperature and humidity sensor with I2C interface and requires little to no additional components. It comes in an 8BGA package: we can all agree it’s pretty small.
Some of the peculiar characteristics of this chip are that it has a DRDYn pin which goes low any time there is a new reading from the chip (so you can precisely time your requests) and that the sensor is located on the bottom of the IC, so that it’s not exposed to dust and other agents that may false the readings. Also, it has an integrated heater that can remove humidity from the sensor.

So I developed a very small breakout board for this chip as well as an Arduino library (yay, my first one! raspberryPi and nodemcu might come next).

[via]

HDC1000 temperature and humidity sensor breakout, with Arduino library! - [Link]

by Husham Samir @ instructables.com:

A temperature data logger, is a portable measurement device that is able to recording temperature over a defined period of time automatically. The data can be retrieved and viewed after it has been recorded. In this device the temperature will record every one minutes in CSV file.

Temperature Data Logger - [Link]

by Jason Poel Smith @ makezine.com:

When working in extreme temperatures it is important to monitor your body temperature. In freezing weather, your fingers and toes get numb and you can develop frostbite without even noticing it. Likewise, if your core body temperature drops too low, you can start to start to suffer the effects of hypothermia before you are aware of it.

So I designed an automatic temperature sensor that will monitor the temperature of your fingers, your toes, and your torso, as well as the outside temperature. This can help you to stay safe when working in extreme cold.

Wearable Temperature Sensors For Working in Extreme Cold - [Link]

“Raz” over embedded-lab.com has written a tutorial on how to interface BMP180 temperature and barometric pressure sensor with Arduino UNO board. The BMP180 is a new generation sensor coming on a LGA package and it’s able to measure pressure in the range of 300 to 1100hPa using low power and achieving low noise measurements. The interface is a standard I2C and sensor is fully factory calibrated. The voltage required to power the IC is 3.3V, so your Arduino must provide 3.3V. On this tutorial the data is displayed on a 1.44″ TFT display and “Raz” moved a step further calculating the altitude from the derived pressure. Code and libraries are supplied on the link below.

Interfacing BMP180 temperature and pressure sensor on Arduino UNO - [Link]

[Raffi] needed a birthday present idea but he wanted to do something extra special. He realized that a big part of gift giving is the anticipation and excitement of opening the present. In order to prolong this experience, [Raffi] built an electronic puzzle box. The box contains the final gift, but first a series of puzzles must be solved in order to open the box.

The project runs on an Arduino Mega. This is hooked up to several sensors, including a temperature sensor, GPS unit, and CO sensor. There is also an LCD screen and numeric keypad for user input and output. The project page contains a flow chart that shows all of the puzzles and their solutions. One of the more interesting puzzles requires the user to blow tobacco smoke into a tube. The CO sensor detects the smoke and unlocks the next puzzle.

Some of the puzzles require interacting with outside systems. For example, one puzzle requires the user to send an email to the fictional Captain Hermano’s email address. If the correct keyword is included in the email, the user will receive a reply with the code to enter into the box. Another puzzle requires the user to call a particular phone number and listen for another riddle. We’ve included the video demonstration below.

This isn’t the first puzzle box we’ve seen, but each one has its own special flair. This one is very well made and looks like a lot of care was put into it. We’ve seen another that uses only discrete components. We’ve seen yet another that uses Morse code.

[Thanks Simon]

by jazzycamel:

I work as a software developer for a biology lab where my day job consists of creating applications to deal with big data visualisation. Recently however one of my colleagues had the need to take regular temperature measurements form a range of jars of liquids over quite an extended period. The commercial available solutions to achieve this are expensive and surprisingly lacking in features. So, as a dedicated hacker and maker, I immediately stepped in an said we could make something better ourselves. So we did. And this is how.

Quick & Easy Temperature Loggers - [Link]