3Pcs LM393 35-24V Voltage Comparator Module with LED Indicator High Level Output Analog Comparator Control 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._x000D_ 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._x000D_ Input Voltage: 4.5 -28V_x000D_ Hole Diameter: app.3.2mm/0.13in_x000D_ Comparator Chip: LM393 G: Power Ground/Negative_x000D_ D: High/Low Output_x000D_ V: Positive Power_x000D_ Out: Load Positive_x000D_ IN: Input Voltage Port_x000D_ Colour: green_x000D_ Material: PCB_x000D_ Size: 39.5x17mm/1.56inx0.67in Package Contents:_x000D_ 3 * LM393 Voltage Comparator Module Only the above package content, other products are not included._x000D_ 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_