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 thermo sensitive temperature sensor, photosensitive sensor and vibration sensor. Using Method: 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 -28V Hole Diameter: app.3.2mm/0.13in Comparator Chip: LM393 G: Power Ground/Negative D: High/Low Output V: Positive Power Out: Load Positive IN: Input Voltage Port Colour: green Material: PCB Size: 39.5x17mm/1.56inx0.67in Package Contents: 18 x LM393 Voltage Comparator Module Only the above package content, other products are not included. Note: Light reflection 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.