So instead of mumbling about the generic blah’nee’blahs of the open source hardware scene we’ll dive on in and talk about the proverbial darling of the open source hardware movement – The Arduino.
Arduino, according to their own propaganda, is a prototyping platform. All this means is that it’s a very clever electronic blank canvas just waiting for your ideas to be plugged into it. At its heart is a fairly simple micro-controller or brain, if you like the anatomical vernacular. Its nervous system consists of a number of digital (on or off) plugs that can be configured to accept an input or act as a digital output (like a switch). And for some real world usability the Arduino also has a number of analogue inputs that will let you connect all manner of sensors.
To control the comings and goings of your latest invention you’ll need to program the little board using the USB port on you PC. To get you started there’s free software that comes ready to go with a multitude of free examples to both whet your creative whistle and to help you learn the ins and outs of the simple programing environment.
So let’s nutshell it up:
- The Arduino is an Open Source prototyping platform.
- Thinks of it as an easy to program mini-computer.
- It uses the sensors you’ve attached to react to the world around it.
- They’ve been used as interactive art projects, to make toys, and to help the disabled.
- Anyone can use them and they are super cheap.
- Their designs are freely available for you to make your own.
From here you’ll connect the outputs to some relays (electronic switches) and these will let you open the electronic valves that send your water to the vegie patch. Plug in a rain sensor or a soil moisture sensor and the system will hold off watering when it’s damp.
To power the system you could set up a cheap 10 watt solar panel and 12 volt battery – there’ll be no need to muck around with big, dangerous voltages. The Arduino you could also tell some low voltage lights to switch on when it gets dark. And for a little added mischief you could add a movement sensor that turns on the sprinklers when the balaclava clad man breaks into your greenhouse to steal your carrots. Open source revenge.
So there you have it. Your creativity is only limited by your imagination. Before you know it you’ll have designed an Arduino based robot the tends your vegie patch, cooks you dinner and shines your shoes – all powered by the sun and the fumes from your compost heap.
If you’ve used the Arduino for your green projects we’d love to hear about them. Enjoy. Make.