HC-89 Interrupt Sensor HC-SR04 Ultrasonic Sensor Holder 1GHz ARM Processor: The BCM2835

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HC-89 Interrupt Sensor HC-SR04 Ultrasonic Sensor Holder 1GHz ARM Processor: The BCM2835```html HC 89 Interrupt Sensor The HC 89 Interrupt Sensor is a compact, slotted optical switch module designed for precise object detection, position sensing, and counting applications. Featuring an infrared LED and phototransistor pair housed in a U shaped gap, this sensor reliably detects when an object passes through or interrupts the optical beam making it essential for encoder wheels, motor speed measurement, end stop detection, and automated