have any of you made a diy eco fan

gamston

hi folks


only just seen these eco fans, and don't really want to pay the £70 for a real one
so I've been search the net for plans for a DIY one
lots of sites show the made up eco fan and list parts
but don't show the parts pre full build, as I'm planning to made it as cheaply, with most of the parts from my garage spares boxes
I could do with seeing the parts laid out
can any one help

[Deleted User]

People make them out of cheap computer CPU heatsinks and fans and sell them for 3x the price of the parts.

Greenfires

Forgetting that a CPU fan is completely different to an ecofan, which is designed specially to move a lot of air very gently so you don't notice it..

gamston

yes I was looking at using CPU fan, but as greenfires says fan moves to much air, and there 12V motors
so was looking at using cpu heatsinks and buying a smaller voltage motor, then making a fan blade as I think model plane ones pull rather than push the air

Ectophile

If you mount a model plane prop backwards on the motor drive shaft, then it will push instead of pulling.

Dieselman

Off e bay i got a 3v motor and a plastic housing it sits in and then a heatsink & the modular power supply 4.5v

Built it up made a fan from a metal biscuit tin and soldered it to the motor spindle.

Now it worked as it heated up and got quicker but when it got too hot it slowed down to then stopping, so i think it had a heat range.

The plastic motor housing warped with the heat to be expected made a metal one, but still not overcome the overheating problem as yet.

All in it cost me about £15.00 and good fun to play with still not finished just a bit busy at home.

gamston

thanks all,
wondering if I should just bite the bullet and buy one of the non-motorised fans
about £55 from ebay, but they look ok, think my homemade one would look like a bit poor of modern art,