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Recent Articles
When the days are getting shorter

When the days are getting shorter

…begin the ‘fightback’ with some cool garden lighting (no cabling required!). The days are getting shorter, but this doesn’t automatically mean that you can’t sit out in the evening and have a nice glass of...
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Water battery lights LED

Water battery lights LED

In my previous post I made a battery of nails, copper wire and vinegar. This time I used plain tap water (not salted or anything) and 12 bottle caps instead of 9 and guess what, the LED burns as brightly as with the vinegar! If you want to...
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DIY vinegar battery lights LED for several days

DIY vinegar battery lights LED for ...

Always wanted to make your own battery? Homebrew electricity! Maybe you already heard about salt water batteries made from sea water, but this is something you can easily do at home in a few minutes. This homemade battery is based on two...
Solar jar DIY: repurpose an old solar garden lantern and make a Sun Jar!

Solar jar DIY: repurpose an old sol...

So a while back you bought a solar lantern (maybe like the one I have, a SOLIG Solar Powered Globe from IKEA) which you hung on some branch. Nice! It did its job excellent but after a year or two the lantern looked like it had its best...
Solar light bulbs from plastic bottles

Solar light bulbs from plastic bott...

A litre of light (Isang Litrong Liwanag) is a incredible project which aims to bring eco-friendly and cheap Solar Bottle Bulbs to disprivileged communities and millions of people who live in the dark. This is a really cool invention and...
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Solar powered fuel cell toy car

Solar powered fuel cell toy car

Once upon a time I had a RC car with a 3.5cc nitro engine. Lots of smoke and noise. I loved the thing, until it crashed into a sidewalk with 50 km/h… So that was many years ago and I haven’t had a toy car since. Now however...
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DIY Stirling engine from a tuna can

DIY Stirling engine from a tuna can

I am currently working on my third engine, after my 1st and 2nd attempts failed miserably… I thought my third engine would run. I thought wrong. It was airtight, it turned smoothly but it seemed that the piston didn’t had...
Stirling engine homemade hot air diy, attempt #2

Stirling engine homemade hot air di...

OK, two days after my first attempt of building a homemade stirling engine, I somehow cooled off and tried again. I fished the 250 ml. soda can I threw in earlier out of the trash bin, straightened it, build the darn hot air engine…...
Recent Comments
  • Harmjan H.: Sure as long as everything is connected or will be connected...
  • Sharon: Hi, I have just purchased some solar fairy lights for my dau...
  • Harmjan H.: Very interesting idea, but I'm afraid that these systems won...
  • TJ: Is it possible to make a unit large enough to power a house ...
  • Harmjan H.: Sounds like a broken wire after the last working light. Can ...
  • Harmjan H.: That's a strange problem you got there.... Is it possible to...
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Solar powered fuel cell toy car Once upon a time I had a RC car with a 3.5cc nitro engine. Lots of smoke and noise. I...
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The Flip Flap Flower toy brings you... Yep! Solar powered flowers! For your desk and car dashboard! Or for your partner! Or just...
Scare your mother(-in-law) with thi... …most people hate them. They can be anywhere. In your bed, in your closets, in your...
About Us
Moved from a big city in the Netherlands to a small village in the Czech Republic, here in the mountains we're trying to do what we think is fun to do! Write, experiment, build, grow vegetables, maintain our house etc. Since the sun is one big ball of energy, why not try and gain from it? May the sun be with us! For a long time....!