Product Description<br><br>VCC: positive power supply 3.3-5V<br> <br>GND: power supply is negative<br> <br>DO: digital output module  the output of low magnetic induction<br> <br>AO: Hall real-time voltage output<br> <br>Hall sensor module<br>2PCS speed measurement Hall sensor module Hall switch motor tachometer module DIY<br><br> <br>For magnetic field detection<br> <br>Sensors 3144E switch type Hall sensor:<br> <br>Module has two outputs:<br> <br>1  AO  real-time output Hall<br> <br>2  DO  Hall signal after adjusting the output of the comparator<br> <br>Module Features:<br> <br>1  small size  32mm X 14mm<br> <br>2  there is mounting screw holes of 3mm<br> <br>3  can be used DC power 3-5.5v<br> <br>4  real-time output signal Hall<br> <br>5  after the adoption of a more stable order comparator output signal<br> <br>6  the comparator output capability 16mA<br> <br>7  a power indicator light<br> <br>8  the comparator output indicator lamp<br> <img src="//gdetail.image-gmkt.com/030/717423496/2016/4/464fb634-8d33-4622-af0d-b90c650ae483.jpg"  width="589" height="497" onerror="this.src='http://gdetail.image-gmkt.com/030/717423496/2016/4/464fb634-8d33-4622-af0d-b90c650ae483.jpg'; $(this).attr('onerror'，'');" ><br><br><img src="//gdetail.image-gmkt.com/030/717423496/2016/4/da0778be-dc6e-4d80-b21b-8719fcd414e4.jpg"  onerror="this.src='http://gdetail.image-gmkt.com/030/717423496/2016/4/da0778be-dc6e-4d80-b21b-8719fcd414e4.jpg'; $(this).attr('onerror'，'');" ><br><br> <br>Packaging Details<br>Unit Type: lot (2 pieces/lot) Package Weight: 0.030kg (0.07lb.) Package Size: 15cm x 14cm x 2cm (5.91in x 5.51in x 0.79in)