Symetric Magnet Motor Idea

[TinselKoala]

Interesting cheap self-build unit..

http://www.instructables.com/id/Magno-Sniffer-Magnetic-Sniffer-Probe-Whistler-Thi/

Here's a hall-effect from Steorn for around 300 Euros. It has data logging via USB as standard, and a "2-D" tip. It reads both Gauss and Polarity, but requires the interfaced PC to work, and read the data (probably the cheapest out there with these features).

http://www.steorn.com/steornlab/hall-probe/

You can take that sniffer from Instructables, or even just the sensor chip (or an Allegro Microsystems A1321), and for under 100 US dollars you can build a Velleman K8055 interface board, which comes with sufficient software to do what Steorn's setup does, and a lot more. Plus you can trust the instrumentation and software to give you correct data--which I would not trust Steorn's to do.
http://www.velleman.be/ot/en/product/view/?id=351346
http://www.allegromicro.com/en/Products/Part_Numbers/1321/index.asp

The stock linear ratiometric Hall sensor chip is only a couple bucks, and you can get one with NIST-traceable calibration for 25 bucks.

(Oh, and there are LabView .vi modules for the Velleman board, and you can write your own software for it...)

[CombinedTech]

Hi all.

I'd just like to make it clear that I do not in any way think that I have the one and only solution, and that my little idea Will spin for ever and ever, producing Tera Watts for all man kind 
I just have a lot off ideas, and I often find my way around problems in a way that many others don't .... that's it and that's all.
Secondly I also have a big problem trusting information from a system driven by economics.
There are things going on that we do not understand, and they can not just be written of because science (as we know it) does not accept it.

Thanks for the tips guys 

The Steorn probe is a little bit to pricey for me......... (But I am very excited about the development of the whole Steorn history, let's all hope they come through in 2009)

@TinselKoala

I have been looking at the Velleman products previously, but that was the K8061 http://www.velleman.be/ot/en/product/view/?id=364910
I have a experimental miniature heating pump that I'm playing with, and could use the K8061 for that one also.
Would the K8061 not work as good as the K8055? (I'm not into electronics, and my elektro helper is very busy putting food on the table for his family)

[TinselKoala]

Hi all.

I'd just like to make it clear that I do not in any way think that I have the one and only solution, and that my little idea Will spin for ever and ever, producing Tera Watts for all man kind 
I just have a lot off ideas, and I often find my way around problems in a way that many others don't .... that's it and that's all.
Secondly I also have a big problem trusting information from a system driven by economics.
There are things going on that we do not understand, and they can not just be written of because science (as we know it) does not accept it.

Thanks for the tips guys 

The Steorn probe is a little bit to pricey for me......... (But I am very excited about the development of the whole Steorn history, let's all hope they come through in 2009)

@TinselKoala

I have been looking at the Velleman products previously, but that was the K8061 http://www.velleman.be/ot/en/product/view/?id=364910
I have a experimental miniature heating pump that I'm playing with, and could use the K8061 for that one also.
Would the K8061 not work as good as the K8055? (I'm not into electronics, and my elektro helper is very busy putting food on the table for his family)

Yep, the Velleman 8061 is an expanded version of the 8055 with more I/O channels. Also a bit more expensive. So it depends on your needs. The 8055 is more than enough for me, plus it has 2 pwm outputs whereas the 8061 only has one.

I've built about a dozen Velleman kits and they are high quality--no complaints from me.

If all you need is rough indications of polarity and field strength you can just use the Hall sensor (about 2 bucks), a 5 volt DC source like 3 D cells, and a cheap digital VOM that will show positive and negative voltages.

[CombinedTech]

plus it has 2 pwm outputs whereas the 8061 only has one.

Speaking of PWM.
I got some old amplifiers laying around, I was thinking about hooking one up as a PWM.
PC audio out to Signal in. Speaker out to load
Frequency control from any PC audio program, variable HZ
Have I lost my mind, or would this actually work? (like I said, im not into electronics)

[TinselKoala]

Speaking of PWM.
I got some old amplifiers laying around, I was thinking about hooking one up as a PWM.
PC audio out to Signal in. Speaker out to load
Frequency control from any PC audio program, variable HZ
Have I lost my mind, or would this actually work? (like I said, im not into electronics)

Well, it might work, depending on your pc sound generating program and the motor you are trying to drive. You need to be able to generate a pulse, or "square wave", with variable frequency  and duty cycle, and you have to be able to set the DC offset. The optimum frequency depends on the motor, and the pulse width (aka duty cycle) is your speed control, and the DC offset or peak to valley voltage also depends on the motor. You might have difficulty here, since audio is typically AC and you want pulsed DC. I haven't tried it, but with certain motors and the right software it might work.
It would seem simpler just to use a PWM circuit--there are many on the net, simple and not-so-much. It would be a good way for you to "get into" electronics!