Joy chenn Posted August 18, 2022 Report Share Posted August 18, 2022 I got a hall effect sensor,but it only have 2 wire not we usually see 3 wire type. And i have no idea which wire's meaning. How to connect it to my ecu? Quote Link to comment Share on other sites More sharing options...
aerace_fab Posted August 18, 2022 Report Share Posted August 18, 2022 You sure it's not a VR sensor? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 18, 2022 Report Share Posted August 18, 2022 It could possibly be magnetoreistive too (some call them "active sensors"). These are a 2 wire sensor that output a squarewave. They are often tricky to get to work - they generate a change in current rather than a change in voltage so you need to mess around with a scope and various pull-ups/downs until you get a suitable voltage change coming out of the circuit. Quote Link to comment Share on other sites More sharing options...
Joy chenn Posted August 19, 2022 Author Report Share Posted August 19, 2022 Is it‘s wiring like this？ 5 hours ago, Adamw said: It could possibly be magnetoreistive too (some call them "active sensors"). These are a 2 wire sensor that output a squarewave. They are often tricky to get to work - they generate a change in current rather than a change in voltage so you need to mess around with a scope and various pull-ups/downs until you get a suitable voltage change coming out of the circuit. Is it’s wiring like this? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 19, 2022 Report Share Posted August 19, 2022 7 hours ago, Joy chenn said: Is it‘s wiring like this Yes, but there are two different connection types. Some have the power supply connected directly to one side of the sensor, then a pull-down resistor to ground. Others have one side of the sensor connected directly to ground, then a pull-up resistor on the power supply side. But the difficulty is you need to experiment with both the supply voltage and resistor value until you acheive a suitable voltage output. For a Link DI you will want the signal to rise above about 2.0V and fall below about 1.0V. Some more info here: https://www.motec.com.au/filedownload.php/CTN0007 Magneto Resistive Sensors.pdf?docid=3634 Quote Link to comment Share on other sites More sharing options...
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