Reading analog signals with the RasPiO Duino and the Raspberry Pi

raspiduinoanalog

Alex Eames has now finished his series of videos about the RasPiO Duino, the great little add-on board for the Pi that gives you an ATMega chip, breakouts and a prototyping area. The last video is all about reading analog signals, such as those from a light sensor, and feeding them back to the Pi over a serial connection. So, if you want to see how this board can be used for this purpose, take a look on YouTube.

Emailing, tweeting, SMSing garage door with a Raspberry Pi

Bit of an old post, but it’s still a great project to do!

Richard Lynch is a Boston, MA-based software engineer who loves the Raspberry Pi. He decided to use the Pi to monitor whether his garage door had opened. To do this, he used the usual equipment plus a magnetic sensor to determine the state of the door. He then did a bit of programming that would email, tweet and SMS when the door opened. Read about it here and here.

The Internet of Lego with the Raspberry Pi

Cory Guynn has built an entire city out of LEGO and then connected up various sensors and motors to it to sense and control aspects of the city. He has then used node.js and NodeRED on a Raspberry Pi to develop an application to send IOT messages to online service PubNub. It really is an impressive piece of work and goes to show what you can do with enough space, enough LEGO and enough imagination. Read about the development of the app here and visit the homepage for the city here.

Hamsters: Lazy or marathon-runners? Let your Raspberry Pi work that out

HamsterPi

Last year, Los Angeles-based software engineer Michelle Leonhart brought two Roborovski hamster puppies into her home. Since then, she read on the internet that the average Roborovski hamster runs four marathons every night. She decided to put that to the test. Enter the Raspberry Pi. She connected the hamster wheel to a VCR head to reduce friction and then attached a magnet. Then, she placed a hall effect sensor near the wheel and had the Pi record how many times the wheel turned. Some more mathematics later and she finally deduced how far her hamsters were running every night. I won’t spoil the ending by giving away the results – head over to the opensource.com blog to read the full story.

Here is some hamster video action, just because they’re cute.