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Forum Index : Electronics : Hall Effect circuit
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| Guests Guest  Joined: 01/10/2003 Location: Posts: 52 |
Ultimately I'd like to run a small board off one - probably running a PIC and an LCD screen - showing current rpm's and possibly even a datalogger that was able to keep a record of rpm's (and therefore windspeed ) over time. Rather than waste a lot of time reinventing the wheel - has anybody done anything like this - or given up because it's too hard to do?
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| brucedownunder2 Guru  Joined: 14/09/2005 Location: AustraliaPosts: 1548 |
http://www.anotherpower.com/gallery/brucedownunder/Hall_sens ors I looked at these for many weeks wondering the same idea's. The only obstruction is you would have to bring down another 3 wires,in my case ,some 100 metres. I did set them up on my test bench,but could not get anything out of them -possibly my fault,though. If anyone knows how to connect them to a car tachometer ,please post a Cct. Bruce Bushboy |
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Chris Senior Member  Joined: 12/09/2005 Location: AustraliaPosts: 146 |
Hmm, i might give it a try. I Reckon i could get them to work if i had a none bent F&P magnetic hub. The thing about those hall effect sensors is, you need to send voltage in to get voltage out. They are like a transistor that activated by magnetism. It would probably be about 5v. Look up the hall effect sensors on alldatasheet and see what the pinouts are, and what sort of input voltage you need to use. |
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Saaremaa Newbie  Joined: 10/12/2005 Location: AustraliaPosts: 13 |
>http://www.anotherpower.com/gallery/brucedownunder/Hall_sens ors Thanks for the link Bruce. > I looked at these for many weeks wondering the same idea's. The only obstruction is you would have to bring down another 3 wires,in my case ,some 100 metres. Right - but as usual I was going to complicate it firther than it need be. My idea was to use a lowrange bluetooth chip - to send data down to a Pocket PC.
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5012 |
I did have a play with them a few weeks ago. This is what I discovered.... They need 5 volts to run. The output is on or off, not a variable voltage depending on magnetic strength, so they are no good for current measurement. They are latching. If you pass a N pole past them, they switch on and stay on untill you pass a S pole past them. On a F&P with its 56 magnets, you would get 28 pulses. So yes you could use them to measure windmill rpm. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| rpned Newbie Joined: 03/02/2006 Location: Posts: 4 |
Anyone been successful in digging up a datasheet for any of the Hall Effect Sensor IC's used in the F&P stator? So far have tried to locate a datasheet for two sensors used without any joy. From what I can see, the circuit shown in the graphic would be close to correct, bit unsure of the Capacitors values but it's the best I can do with what's available. Also recently picked up a "Gentle Annie", no doubt the precursor to the machines curently available. Have taken some photos and can post them if anyone is interested. Cheers
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I'm wondering if anybody has looked into using the F&P Hall Effect board which comes free with every motor. It seems such a shame to waste them - but they are sitting there unused - purely and simply because I can't find any info on using them or a schematic.