DAOKI® 5 PCS Slot Type IR Optocoupler Speed Sensor Module LM393 for Arduino
Features:<br /> <br /> Working voltage: 3.3V~5V<br /> Weight: 8g<br /> Dimensions: Approx.3.2 x 1.4 x 0.7cm<br /> 5mm Groove width<br /> Using wide voltage LM393 comparator<br /> Application: Widely used in dynamo speed detecting, pulse counting, etc<br /> Output form: Digital switch output (0 and 1) and Analog for Sensitivity.<br /> <br /> Package included:<br /> <br /> 5 x Speed sensor<br /> <br />