LM393 universal single supply comparator module enables precision voltage linear tunability. It supports high and low level output with dual channel load driving capability, ideal for front-end signal acquisition and microcontroller interface applications. Suitable for use with NTC temperature sensors, photoresistors, and vibration sensors.Operation: Adjust reference voltage using the onboard potentiometer. Compare sensor voltage (via resistor divider) against the reference to generate high or low logic level output.Specifications: - 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 - Dimensions: 39.5 x 17mm (1.56 x 0.67 inches) Package Includes: 3 x LM393 Voltage Comparator Module Note: The package includes only the items listed above. Other accessories are not included. Due to lighting and display differences, actual product color may vary slightly from images. Measurement tolerance: 1-3cm.