Usage Tips:LM393 universal single supply comparator module enables precision voltage linear tunability. It can achieve high and low level and load driven dual channels output. It is convenient for front-end acquisition and acquisition of single-chip switching. Apply for NTC sensitive temperature sensor, photosensitive sensor and vibration sensor.Using : Generate reference voltage by reference voltage adjusting potentiometer. Compare voltage generated by sensor and divide resistor with reference voltage. Achieving high and low level comparison result output.Input Voltage: 4.5 -28VHole Diameter: app.3.2mm/0.13inComparator Chip: LM393G: Power Ground/NegativeD: High/Low OutputV: Positive PowerOut: Load PositiveIN: Input Voltage PortColour: greenMaterial: PCBSize: 39.5x17mm/1.56inx0.67inPackage Contents:3 * LM393 Voltage Comparator ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.