This Instructable describes building of a fun and very simple LED clock using Arduino that displays the time to the nearest half hour using LEDs.
Arduino LED clock – [Link]
An all-in-one, water and sand resistant, solar charger, audio speaker system, and sunburn timer calculator by starwisher. Check out the project’s instructables page here:
This Instructable harnesses the power of Arduino, a UV sensor, and simple mathematics to make one nifty gadget sure to boost your outdoor summer fun – and minimize your indoor summer recovery!
Beach Buddy, a 3-in-1 solar phone charger, boombox, and sunburn timer calculator – [Link]
by Edwin Chen @ open-electronics.org:
The model of this shield named Yun Shield, the feature of this shield is as its name. User can add this shield into Arduino (Leonardo, UNO, MEGA2560 etc) and “turn” the Arduino into device which has similiar features as Arduino Yun: support remote upgrade and use the Bridge library.
With this shield, user can easy to set up communcation between Arduino and Internet (via ethernet , wifi or 3g etc) and add support for USB flash, video. The detail user guide/ manual can be found in the dragino website and most Arduino Yun Sketch / examples can reuse with this Shield. This shield is under production and will be ready within one months time.
Add Linux, WiFi, Ethernet and USB to Arduino – [Link]
by raptor_demon @ instructables.com:
What is this? it is a arduino compatible (ATMEL 328p) based home bathtub controller.
this controller sets the depth, adds bubbles and monitors the temperature of a bathtub based on a user profile. v2.5 has support for Internet of things but it is not fully implemented.
But why? Well why not? ever wanted to have a bath ready at a touch of a button or from your smartphone (coming soon)?
Arduino Compatible Bathtub controller – [Link]
Paul over at DorkbotPDX writes:
For the last several weeks, I’ve been working on SPI transactions for Arduino’s SPI library, to solve conflicts that sometimes occur between multiple SPI devices when using SPI from interrupts and/or different SPI settings.
To explain, a picture is worth 1000 works. In this screenshot, loop() repetitively sends 2 bytes, where green is its chip select and red is the SPI clock. Blue is the interrupt signal (rising edge) from a wireless module. In this test, the interrupt happens at just the worst moment, during the first byte while loop() is using the SPI bus!
Without transactions, the wireless lib interrupt would immediately assert (active low) the yellow chip select while the green is still active low, then begin sending its data with both devices listening!
SPI Transactions in Arduino – [Link]
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]