Arduino Hydreon RG-11 Optical Rain Sensor interfacing

This is part of the TechEd Section. My project of tying together various sensors to work out what is happening around the property is taking shape. I just took delivery of the Hydreon RG-11 Optical Rain Sensor a few days ago, cost $99 plus postage from Ocean Controls.  A nifty little unit that makes use Read more about Arduino Hydreon RG-11 Optical Rain Sensor interfacing[…]

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Arduino Clones and DHT11 temperature/humidity sensor

This is part of the TechEd section. As previously mentioned, to diversify my techie skills (and its fun), I have a little side home DIY project on the go to achieve the following: Create a RS485 network, to allow me to easily connect together multiple Arduino’s over a distributed network. Gateway said RS485 network onto Read more about Arduino Clones and DHT11 temperature/humidity sensor[…]

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Arduino and multiple power sources – things to watch out for…

This is part of the TechEd section. As I mentioned previously , I had a need to double check that the 5v USB supply from my laptop was floating with respect to my lab power supply. I measured a no load difference on the 0v lines of around 120v – which raised the obvious concern Read more about Arduino and multiple power sources – things to watch out for…[…]

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Arduino Uno clone RS485 network

At home I have a need to measure temperature and control various circuits in response to those temperature changes and other inputs. The sensor network needed to span at least 100m and ideally should have the ability to reach out to 200m (so I could get down to the Chicken Coop and pool). Looking around Read more about Arduino Uno clone RS485 network[…]

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