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Forums
Engineering
Electrical Engineering
Eddy current position sensor circuit
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[QUOTE="Rx7man, post: 6558498, member: 583059"] I've studied that layout and those vids a fair bit, this only uses a single coil for the sensor, but it shares a ground with the pump position sensor, though they're magnetically isolated.. the blue side circled here is a completely different sensor[ATTACH type="full"]291368[/ATTACH] Here's the circuit I drew up in Spice, r1-3, c1-3 smooth the square wave to about a sine wave, U1 and resistors provide fixed impedence, L2 is the sensor, and the rest of the lower right side takes the peaks of the square wave, smooths them, and will feed the ADC After about 2 days of fighting with the microcontroller, poring over the datasheets, etc I finally was able to get it to output an adjustable frequency square wave, though I may yet go with a LTC1799 oscillator chip... At this point I can at least breadboard something together to test it...Also working on a current sensor circuit that drives the control solenoids [ATTACH type="full"]291369[/ATTACH] [/QUOTE]
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Electrical Engineering
Eddy current position sensor circuit
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