For all DIY (Do It Yourself) project enthusiasts, we have another piece. Last time we covered home gardening with Raspberry Pi and today we bring a continuation in the form of a simple manual - how to build a small wind turbine for home charging purposes. It's not nearly large enough to power big electrical machines, but it's useful not only for showing off to visitors but also for charging portable electronics or for small outdoor lighting. As the heart of the power generator, you can use a stepper motor from an old and already discarded inkjet printer, which is much more efficient for this purpose (it only needs 200 revolutions per minute) than, for example, a DC motor, where you would need thousands of revolutions per minute to achieve the same power efficiency. 
The stand is made from PVC pipe, which isn't exactly environmentally friendly, but on the other hand is very accessible. And if you want to go an even greener route, then you'll surely figure out how to recycle this part from something old, or get some ecological equivalent. The video manual is without words, so you'll have to figure out some parts yourself. What you'll struggle with a bit is obtaining the drive system, i.e., the propeller. The version in the video uses a model airplane propeller for small aircraft. But there are many plans on the internet for how to make your own blade turbines, so if you like to tinker, you can make one quite easily too. Using a 12V car lighter paired with a charging adapter, this wind turbine will produce a stable 5V 1A output (which is ideal for charging weaker electronics), but if you skip the charging adapter, you can get much higher voltage (which will allow charging larger batteries as well, but with the risk of variable power output, which you'll always have to measure before charging). We're keeping our fingers crossed for your manufacturing and green electricity generation. Greenhousing.cz team Greendata s.r.o.