LM393 universal single supply comparator module enables precision voltage linear tunability. It provides high and low level dual-channel output with load driving capability. Suitable for front-end signal acquisition and microcontroller switching applications. Compatible with NTC temperature sensors, photosensitive sensors, and vibration sensors.Usage: Generate a reference voltage using the adjustable reference voltage potentiometer. Compare the sensor voltage (via resistor divider) with the reference voltage to obtain a high or low level output signal.Specifications: Input Voltage: 4.5 - 28V Hole Diameter: approx. 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 ModulesNote: Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.