Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si LM393 universal single supply comparator module enables 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 : 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: Ground/Negative D: High/Low Output V: Positive Out: Load Positive IN: Input Voltage Port Colour: green Material: PCB Size: 39.5x17mm/1.56inx0.67in Package Contents: 3 * LM393 Voltage Comparator Module Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.