LM393 universal single supply comparator module enables precision voltage linear tunability. It supports high and low level output with dual channel load driving capability. Designed for convenient front-end signal acquisition and switching control in microcontroller applications. Suitable for use with NTC thermistor temperature sensors, photosensitive sensors, and vibration sensors. Using Method: Generate reference voltage using the onboard potentiometer. Compare the sensor voltage (via resistor divider) with the reference voltage to obtain high or low level output signal. Input Voltage: 4.5 - 28V Hole Diameter: approximately 3.2mm Comparator Chip: LM393 G: Power Ground/Negative D: High/Low Output V: Positive Power Out: Load Positive IN: Input Voltage Port Color: green Material: PCB Size: 39.5 x 17mm Package Contents: 3 x LM393 Voltage Comparator Module Note: Light shooting and different displays may cause slight color variation between the item in the picture and the actual product. Measurement error allowed is +/- 1-3cm.