HRS Posted April 28, 2014 Share Posted April 28, 2014 I am planning on using some online schematics to make my multimeter also convertible to a gaussmeter. One DIY page said I could find a Hall Effect Sensor in CD ROM and DVD players. Where might this be located in the players? We have a few old DVD players so I suppose I'll extract the motor, laser, variable resistor dials and some other things too. Link to comment Share on other sites More sharing options...
Externet Posted April 28, 2014 Share Posted April 28, 2014 Dismantling those may be too damaging. Easier source are computer fans. If you do not know how to dismantle one (remove label and tiny circlip) It is on the circuit board. Shown here----> http://www.pcbheaven.com/wikipages/images/thumbs/howbrushlessmotorswork_1269516340.jpg Link to comment Share on other sites More sharing options...
Danijel Gorupec Posted April 28, 2014 Share Posted April 28, 2014 HRS, I don't know if you are aware, but there are hall sensors and hall switches. I understand you need a sensor (analog output), while switches (digital output) seem more common today. But I don't know if there is any hall analog sensor in a CD/DVD player, sorry. Link to comment Share on other sites More sharing options...
Enthalpy Posted July 21, 2014 Share Posted July 21, 2014 Hall effect sensors are dirt-cheap, just buy: http://www.conrad-electronic.co.uk/ce/en/overview/0231410/Magnetic-Field-Detectors-Hall-Sensors I've seen some meant for use with a multimeter: properly calibrated and with the convenient connectors. Link to comment Share on other sites More sharing options...
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