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MAX44009 Photosensitive sensor Photoelectric relay module Light intensity detection Serial port computer - Demo board

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CNC timing relay module Sound and light alarm 0 999S timing Optocoupler isolation 6 36V power - Demo board

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Voltage comparison relay Undervoltage disconnection protection module Optocoupler isolation drive Upper and lower thresholds - Demo board

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Voltage comparison relay module Upper and lower threshold detection alarm Overvoltage protection Charge and discharge Battery - Demo board

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NE555 Module Delayed timing relay module timing time adjustable 6V 30V power supply Function demo Board - Demo board

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