HOA0973-T55

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Optical sensors use a light source to sense physical parameters within a certain range. Photointerrupters type sensors are used to detect the presence of an object by using a light source, usually an LED, that produces a beam of infrared light that is directed to a phototransistor. When the light beam is interrupted an output signal is generated and an action or event is detected.

The HOA0973-T55 is a slot type of the optical sensor that utilizes a phototransistor, and features a logic output that provides a digital signal. It is designed to detect objects that pass between its emitter and detector. The operating voltage range is from 4.5V to 36V, making it suitable to be used for direct connection to digital or analog circuits.

The device consists of a 7.9 mm slot molded plastic housing that contains an infrared emitter and detector that are optically coupled in the same package. The emitter is an LED and the phototransistor receiver are mounted opposite of each other. The device also includes a amplifier and comparator, to produce a logic high (status indicator) output when the light beam is blocked. When the light beam is present, the comparator output is logic low.

This type of optical sensor can be used in a wide range of applications where objects needs to be detected and counted. Typical usage includes detection of paper jams in copy machines, automobiles’ gear switches, vending machine applications, production counters, bottle counters and many more. It can also be used for sensing accuracy measurements in production lines where spacing between objects needs to be monitored.

The main working principle of HOA0973-T55 is its ability to detect objects and interrupt the LED’s infrared light beam. This interruption is sensed by the phototransistor and compared to a preset level. Therefore the output of the comparator will be a digital low (0) or high (1) logic level. This digital signal can then be used to trigger a digital of analog switch, allowing the microcontroller to detect the presence/absence of the object.

The effective sensing range of this slot style optical sensor is adjustable. Troubleshooting can be done by adjusting the left and right potentiometers in order to minimize false triggering due to noise signals. In a typical application, the emitter should be set at a slightly higher level than the detector, this allows a reliable detection even in low ambient light conditions. In occasions where the devices is being exposed to ambient light, the devices must be shielded in order to maintain its sensing range.

The HOA0973-T55\'s simple design and operating principle makes it an ideal choice for a wide range of optical sensing applications. Its small form factor and low operating voltage makes it suitable for applications where space is limited. It also features a reliable and fast detection speed, making it an excellent choice for applications that require a fast response time. With its easy to use adjustable sensing range and the logic output, the HOA0973-T55 is a reliable and versatile optical sensor that provides a great solution for detecting objects.

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