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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
HC 89 Interrupt Sensor 16x2 LCD Module (Green) Obstacle Avoiding Robot: Combine with ultrasonic Obstacle Avoiding Robot: Combine with ultrasonic sensors and an Arduino to build an autonomous navigation bot for competitions and learning Express shipping options are available for urgent requirements at additional cost Onboard LM393 Comparator: Converts analog phototransistor output into a clean digital HIGH LOW signal Adjustable Sensitivity: Built in potentiometer lets you fine tune the detection threshold to accommodate different object sizes and ambient conditions
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