HOA1881-013

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Optical sensors are devices that detect the presence or absence of light in order to determine the position of an object or to measure the interruption of the light beam between a light source and a receiver.

Photointerrupters are a type of optical sensor used for detecting objects that move in a predetermined path and measuring the interruption of the light between a light source and receiver. Photointerrupters consist of two parts, a light source (sender) and a receiver, which are connected by an optical beam, usually a slot type. When an object passes through the slot, the light is interrupted, and the sensor detects the interruption and generates an output. Photointerrupters are used in various applications such as measuring the distance between two objects accurately or sensing the direction of a rotating object.

One such photointerrupter is the HOA1881-013 from Vishay Semiconductor. This photointerrupter is a 4-pin slot type device with a transistor output. It consists of an infrared light source and an independent receiver. Its receiver has an open-collector transistor output that can be used to directly drive TTL or CMOS logic. The device has a slot length of 3.2mm and a slot width of 0.6mm.

The HOA1881-013 is designed for use in countless applications where precision and accuracy are essential. It can be used to measure the speed of objects in motion, as it can detect the interruption of light when an object passes through the slot. It can also detect the presence of an object in a predetermined area. The device is suitable for use in indoor and outdoor applications, as it is made using weatherproof materials. In addition, it is compatible with various platforms such as microcontrollers, microprocessors, and embedded systems.

The working principle of the HOA1881-013 is not complicated. The sensor contains an infrared LED and a receiver that are separated by an electromagnetic shield. The LED emits light, which is then received by the receiver. When an object passes through the slot, the emitted light is interrupted, and the receiver captures this interruption and generates a signal that is then output via the transistor output.

Overall, the HOA1881-013 from Vishay Semiconductor is a versatile and reliable optical sensor suited for various applications. It is easy to use and can detect the presence or absence of an object with high accuracy. It is suitable for indoor and outdoor environments and can be used to measure the speed of objects in motion or detect the interruption of the light between a light source and receiver. The working principle of the device is straightforward so that users can quickly understand and implement it in their systems.

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