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KDog Regular Location: ACT Registered: July 2002	Re: inductive speed sensor .. how they work? Fri, 24 October 2003 07:22 Yeah the 3 wire sensors are basically a magnetic sensor with an op amp build in to turn the wave from an AC signal into a DC square wave output (or hall effect output is there common name). Can you pull your sensor apart and look inside it. If can could take a clear photo of it I could help. I assume none of the wires is grounded? Check by measuring the resistance of the wires to the case of the sensor. If you get a short then this will be your ground wire. Now there should be some resistance between the other 2 wires, to be honest I would expect around 2K ohms but yours doesn't seem to follow the Toyota sensors I have used. You will need 12V on one wire and the other will be your signal - I would apply 12V to one of the wires through a 100K resistor and measure the output to see if this works. If it doesn't switch them around and try again. Of course I have assumed you have worked out which is the ground wire, if you haven't then there are a few more tries in order. If you can't work it out you can send it to me and i'll do it for you. Now if you can work it out and get it going send me the schematic of the Speedo and I'll give you the adjustments you need to make to meet its input requirements. This will need to be changed because they are setup for the magnetic input. Should only be a matter of changing a few resistor values. [Report message to a moderator]

	Subject	Poster	Date
	inductive speed sensor .. how they work?	CrAiGzEE	Wed, 22 October 2003 13:09
	Re: inductive speed sensor .. how they work?	Cool1	Wed, 22 October 2003 13:24
	Re: inductive speed sensor .. how they work?	CrAiGzEE	Wed, 22 October 2003 23:37
	Re: inductive speed sensor .. how they work?	Cool1	Thu, 23 October 2003 06:40
	Re: inductive speed sensor .. how they work?	ddeane	Thu, 23 October 2003 02:35
	Re: inductive speed sensor .. how they work?	Cressida Supra	Thu, 23 October 2003 07:47
	Re: inductive speed sensor .. how they work?	CrAiGzEE	Thu, 23 October 2003 11:35
	Re: inductive speed sensor .. how they work?	kmwdesign777	Thu, 23 October 2003 12:04
	Re: inductive speed sensor .. how they work?	CrAiGzEE	Thu, 23 October 2003 12:06
	Re: inductive speed sensor .. how they work?	Cressida Supra	Thu, 23 October 2003 13:18
	Re: inductive speed sensor .. how they work?	CrAiGzEE	Thu, 23 October 2003 13:41
	Re: inductive speed sensor .. how they work?	Cressida Supra	Thu, 23 October 2003 14:07
	Re: inductive speed sensor .. how they work?	CrAiGzEE	Fri, 24 October 2003 00:48
	Re: inductive speed sensor .. how they work?	Cressida Supra	Fri, 24 October 2003 01:44
	Re: inductive speed sensor .. how they work?	sideshow	Fri, 24 October 2003 01:52
	Re: inductive speed sensor .. how they work?	mrshin	Fri, 24 October 2003 02:40
	Re: inductive speed sensor .. how they work?	Cool1	Fri, 24 October 2003 03:31
	Re: inductive speed sensor .. how they work?	CrAiGzEE	Fri, 24 October 2003 03:42
	Re: inductive speed sensor .. how they work?	Scorpion	Fri, 24 October 2003 04:24
	Re: inductive speed sensor .. how they work?	KDog	Fri, 24 October 2003 07:22

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