I've been playing with radiation detectors. The common solution is a Geiger - Müller tube, but those solutions tend to be expensive, and contain high voltage connections. PIN Diodes can be used, and are very inexpensive, but are uncalibrated.
This post is part 1 of 4 in the series Raspberry Pi5001Getting Started with Raspberry pi and Node.js Did you know that there will be 6.18 billion devices connected to the internet by the end of 2014 and a whooping 19.42 billion devices between 2015...
The IoT is going to be big, really big. If you thought that mobile was big you need to think again
If you are involved in creating devices or systems that might be classified as being the IoT you will know that your real problems stem from hardware issues such as communications, battery life and so on. After that you hit software problems - protocols, reading and dealing with the hardware at a low level. Only well after you have all of this sorted out does your mind turn to how to get the data crunched and some results displayed. A very common solution when this sort of problem is considered is to create a REST interface or an Android/iOS app.
Doorbells and other consumer electronics such as weather stations, run on the UHF (Ultra High Frequency) band at 433 MHz. The UHF band has a frequency ranging from 300 MHz to 3 GHz and transmitted mainly by line of sight; this means, radio waves are blocked by hills, large buildings etc. - in this case, we're just trying to ring the doorbell from a couple of meters away, using an Arduino.
Project Summary At the Cleveland VMUG events we will be using a new check-in system. The system consists of a Raspberry Pi, Edimax Wifi adapter and a DYMO thermal label printer to perform wireless iPad check-ins.
The BeagleBone Black is a low-cost mini-computer featured enough to gain a lot of attention lately and make dreams come true for generations of makers.
...the BBB offer increased processing power and more features compared with Raspberry Pi. Given all the possibilities offered by this computing platform, here is a selection of projects that can make you understand the power of BBB and how to push the limits and build a variety of stuff with a wide range of parts and accessories. You will find that you can build a robot, automate your home, control the board with a smartphone or a tablet, and perhaps save a lot of time and money implementing your idea.
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