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Forum Index : Electronics : Another Newbie!
| Author | Message | ||||
| matthenley Newbie  Joined: 21/01/2007 Location: Posts: 3 |
Hi there! I've spent a weekend building a small turbine out of an old DC motor and other bits and pieces. My problem is it only generates 2-5 vdc. I had a little gadget (info here) that brought this upto 14vdc, but this died when the whole thing fell off the garage roof. Any ideas? Matt |
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Gill Senior Member  Joined: 11/11/2006 Location: AustraliaPosts: 669 |
Yeh matthenly, I have that "falling off the garage roof" problem too. People say it is the rum, but I think we should use stronger string. Seriously though, thanks for the heads up on that gizmo but I see they sell wholesale only, Where would i be able to buy such a device from? was working fine... til the smoke got out. Cheers Gill _Cairns, FNQ |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
I bought one of these little boosters from Oatley Electronics http://www.oatleyelectronics.com/kits/k091a.html. It worked down to 6 volts, any lower and it shut off. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| matthenley Newbie Joined: 21/01/2007 Location: Posts: 3 |
That's my problem. Can't seem to find anything similar anywhere. How can I get my tiny voltage high enough to trickle charge a 12v battery? Could I just use the coil thing from a transformer and put six times more turns on the output side than the input, resuting in an output of 12-30vdc and therefore keeping my battery topped up? I am trying to recall the stuff I learned at school here, which was way too long ago. I've googled for a curcuit diagram for something, but a I'm a bit stuck for now... Matt |
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| KiwiJohn Guru  Joined: 01/12/2005 Location: New ZealandPosts: 691 |
You could use a transformer but not with DC (well, not without more electronics). I suggest consider saving the DC motor for something else while using something more suitable for this application. Maybe a stepper motor? As a very rough indicator a DC motor must spin faster as a generator than it would as a motor on the same volts. If you can find a higher voltage DC motor it will produce a higher voltage on the same turbine. |
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| matthenley Newbie Joined: 21/01/2007 Location: Posts: 3 |
I found the gadget I originally used on a German site here . Hope this is useful to someone. Thanks for your help and all the best with your projects. Matt |
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