Learn how to create your own low cost wireless sensors and connect them to the world.
Store your sensor data at home or in our cloud. We provide fancy graphs and other great online tools to help you manage and analyze your sensor data!
mysensors.org – Learn how to create your own low cost wireless sensors - [Link]
Timofte Andrei wrote this instructable detailing the build of his Arduino home automation system:
For this project I’ve used:
1. An Arduino clone
2. SIM900 GSM SHIELD
3. Relay module
4. 2×16 LCD Display
5. DS18B20 temperature sensor
6. Push button
7. Some Dupont wires
8. A led module (this is optional, if you have a chinese relay module with built in LEDs)
9. Some nuts and bolts to mount everything in place
10. A wooden chopping board or other kind of wooden board for propper display of the components
Arduino GSM home automation system - [Link]
by gizzmotronics @ instructables.com:
Hello everyone! As the title says, I built an electric go kart which is powered by arduino! Here’s a quick video to make you certain that this is the next thing you’re going to build.
Electric Arduino Go-kart - [Link]
µVolume USB volume control project by Rupert Hirst of RunAwayBrainz:
µVolume T-32 USB Volume Control update, featuring infra red media control
-Arduino Compatible (Atmel Atmega32u4)
-Manual volume adjustment using the rotary encoder
-(IR) Infra red remote control of volume and multimedia controls
-Apple remote or user defined
-Visual and audible Feedback
-RGB Lighting Customization’s
uVolume T-32 USB volume & media control - [Link]
by dzzie @ github.com
The Dht22 sensor is installed in the humidor.
The arduino takes a reading every 20 minutes, and uploads the data to your webserver.
The PHP script will record the data to the database. If the temp or humidity is out of desired range, it will send you an email alert.
Alerts must be manually cleared latter by logging into the web site, so you are not spammed, before you get a chance to fix it.
When you add water, push the select button on the LCD sheild to record it. This will be saved to the db as well. Power resets will also be recorded to the database.
See screen shot for example web report.
Temperature controlled humidor with web logging, monitoring and alerts - [Link]
Ray has a great reverse engineering project! Check out more on his blog rayshobby.net. [via]
At the Maker Faire this year I got lots of questions about soil moisture sensors, which I knew little about. So I started seriously researching the subject. I found a few different soil sensors, learned about their principles, and also learned about how to make my own. In this blog post, I will talk about a cheap wireless soil moisture sensor I found on Amazon.com for about $10, and how to use an Arduino or Raspberry Pi to decode the signal from the sensor, so you can use it directly in your own garden projects.
What is this?
A soil moisture sensor (or meter) measures the water content in soil. With it, you can easily tell when the soil needs more water or when it’s over-watered. The simplest soil sensor doesn’t even need battery. For example, this Rapitest Soil Meter, which I bought a few years ago, consists of simply a probe and a volt meter panel. The way it works is by using the Galvanic cell principle — essentially how a lemon battery or potato battery works. The probe is made of two electrodes of different metals. In the left picture below, the tip (dark silver color) is made of one type of metal (likely zinc), and the rest of the probe is made of another type of metal (likely copper, steel, or aluminum). When the probe is inserted into soil, it generates a small amount of voltage (typically a few hundred milli-volts to a couple of volts). The more water in the soil, the higher the generated voltage. This meter is pretty easy to use manually; but to automate the reading you need a microcontroller to read the value.
Reverse engineer a cheap wireless soil moisture sensor using Arduino or Raspberry Pi - [Link]
by R-B @ embedded-lab.com:
This electronic dashboard for a bicycle uses an Arduino and a few other parts to create a light control system and an LED speedometer. It is powered with eight 1.5V batteries connected in series. Six LEDs on the dashboard indicates how fast are you going on your bicycle.
Electronic dashboard for a bicycle - [Link]
by MakerSpark Industries @ instructables.com:
This Instructable is about how to create an Arduino PIR motion sensor for your room or office, using parts available from your local Radio Shack! Whether you’re looking for a cool and easy-to-build security sensor, or an awesome first project to dive into the world of Arduino, Microcontrollers, and electronics, this project is for you. (This project really is easy. Take it from me, I’m 12, and I’ve only had my Arduino for a week and a half.)
Arduino PIR Motion Sensor - [Link]
Main task – advanced communication between multiple Arduinos using I2C bus.
Main problem – most online tutorials covers just one blinking LED with almost no practical use. Slave just executes ONE and SAME function every time Master asks about it. I’d like to outsource slave Arduinos for zillions of tasks.
Proposed solution – simple protocol which enables to send any number of commands to Slave, opposing single return from simple Wire.onRequest();
Simple I2C protocol for advanced communication between Arduinos - [Link]
by Annikken @ instructables.com:
This waveform generator is based on the work by Amanda Ghassaei. Waveform generators (or function generators) are used for testing and debugging circuits. e.g. frequency response of op amp or sensors. This waveform generator is powered by Arduino with Annikken Andee shield – a device that lets users create iOS/Android interfaces without iOS or Android programming at all. It outputs sine, triangle, saw and square waves. Frequency is controlled by means of a slider (on iOS/Android device) and wave type is selected using on screen iOS/Android button. With a iOS/Android interface, you can add certain features not possible with hardware buttons. E.g. displaying different ranges of frequencies for each wave type, displaying meaningful controls for certain wave types. For example, the pulse width modulation slider is only visible for square wave types, its not visible for sine, triangle or saw wave forms.
IOS-Controlled Arduino waveform generator - [Link]