Hello everyone. I have a Variable reluctance sensor from crank position sensor. I want to connect it to a lm1815m/nopb of Texas instuments and send signal to arduino. I am a beginner so if anyone knows what pin to connect and where that would be very helpful. Any schematics would help more. Thank you in advance.
Need the vendor link or datasheet for the sensor before we can help.
The only thing i found was oem part number: 9625423880 and that has a self resistance of 550ohms. It has two poles.
Have you seen this ?
Yes I saw that, but it is difficult to get one of these here in Greece. They are much more expensive if you include shipping cost. Lm1815 was already in Greece and I got it much faster than Max9926 would take to ship.
Can you measure the supply current with it in circuit? It's probably supplied with a constant current or resistor feed, and then the voltage across it is the output.
Also is it irreplaceable or do you have spares to play with? To reverse engineer it, without being able to run it in circuit, I would put it in series with a similar resistance (you said 550 ohms) and connect to 12V (I assume it's an automobile?). Then scope the output. Actually, those sensors can work at DC so you could use a DMM - place some metal objects on it and look for a voltage change.
But to be sure not to destroy the device, you should know how it behaves in an actual circuit, or get a hold of the specifications.
One problem with this device, it actually contains an RF oscillator. There is a minimum supply current required just to run the device. So again another reason to look at specs, make in circuit measurements, or look at similar devices that do have data sheets, just to get started with some safe test circuits.
Hi,
Have you googled lm1815 arduino
Tom.. 
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