Highrise769
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Could you please provide a basic description?
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Joinedup
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Depends what definition you're using...

1. you could say solar PV panels are devices that collect free energy - once you've paid for the panels to be made, installed and allowed something for maintenance they're making electrical power out of sunlight, and the sunlight didn't cost you anything.

2. gadgets and contraptions seen on youtube (and elsewhere) that either run forever with no energy input or output more energy than is put into them.

The second type contradicts the laws of thermodynamics and are without exception fraudulent. see here https://www.youtube.com/watch?v=06xFhUHFnx8
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uberteknik
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(Original post by Joinedup)
Depends what definition you're using...

1. you could say solar PV panels are devices that collect free energy - once you've paid for the panels to be made, installed and allowed something for maintenance they're making electrical power out of sunlight, and the sunlight didn't cost you anything.

2. gadgets and contraptions seen on youtube (and elsewhere) that either run forever with no energy input or output more energy than is put into them.

The second type contradicts the laws of thermodynamics and are without exception fraudulent. see here https://www.youtube.com/watch?v=06xFhUHFnx8
That guy's videos are very entertaining - an electrical engineer version of Reg Prescott! I particularly like his oil spray experiment with high voltage. Not sure if all of his antics are real though, or, mostly staged and he just has great timing and a hilarious sense of humour.

Warning for anyone wishing to experiment with high voltages: unless you know what you are doing, don't be tempted as there is the very, very real danger of death.
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Joinedup
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(Original post by uberteknik)
That guy's videos are very entertaining - an electrical engineer version of Reg Prescott! I particularly like his oil spray experiment with high voltage. Not sure if all of his antics are real though, or, mostly staged and he just has great timing and a hilarious sense of humour.

Warning for anyone wishing to experiment with high voltages: unless you know what you are doing, don't be tempted as there is the very, very real danger of death.
Yeah - don't try the things you see on that channel at home... or anywhere else.

I wonder if he's a bit casual cos he's usually on North American 120V supply rather than 240V - seemed like he nearly crapped himself when he tried a stupid experiment WHICH NO ONE SHOULD TRY TO REPEAT in a London hotel https://www.youtube.com/watch?v=abqMLqHwqpo
---
A calmer video on over unity and perpetual motion machines that might help diagnose what's wrong with any particular design you've seen
https://youtu.be/rckrnYw5sOA

you might also see waste energy harvesting systems described as 'free energy' examples are systems using sterling engines or thermocouples to extract energy from a thermal gradient... or piezo-electric elements to generate electricity from vibrations... these can work (in theory and in practice) but so far they often aren't economic except in specialist applications where there isn't a 'better' source of energy available.

free energy is a term that's so disreputable it'd be advisable not to use it for any respectable waste energy harvesting project - people will start laughing before they even look at it.
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