02GF74
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| posted on 11/1/07 at 09:14 AM |
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inductive speed sensor
on thge scrounge again (related to my speeo query in electrics).
anyone got an inductive sensor they are binning?
One that is used on engines for crank poisiton or for ABS trigger wheel may work for what I want to do.
RS sell them for £ 10? so woud like to do it for less if poss.
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tks
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| posted on 11/1/07 at 09:24 AM |
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no
that one wont do what you want
they are realy bad and are analog
instead of a nice digital signal.
use a NPN / NO if you want voltage when seeing something.
mine is from siemens and i paid 25Pounds for it. It detects until 8mm!!
Tks
The above comments are always meant to be from the above persons perspective.
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BenB
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| posted on 11/1/07 at 10:29 AM |
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Yup. Inductive speed sensors are pretty nasty. You need to get the sensor very close to the trigger (0.5-1.5mm air gap typically) and you'll get
a very weak (few mV) signal so you'll need to do signal processing (okay, an few op-amps!!) to clean it up.
You can make it work but as mentioned, there are better options out there!!!
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farmer.palmer
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| posted on 11/1/07 at 07:41 PM |
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Hey TKS
can you explain that a little more please, i didn't follow, just being dim.
Ihave a VDO electronic speedo and was going to purchase an inductive sender off RS like 02GF74 mentioned, (if you buy one from VDO stockists they are
very expensive). So what are you recommending instead? NPN/NO ?
thanks
james
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