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OPB121B Encyclopedia Entry
Product Overview
Category
The OPB121B belongs to the category of optical sensors.
Use
It is used for detecting the presence or absence of an object by utilizing an infrared light-emitting diode and a phototransistor.
Characteristics
- Utilizes infrared light for detection
- Compact size
- High sensitivity
- Reliable performance
Package
The OPB121B is typically available in a small, compact package suitable for integration into various electronic devices and systems.
Essence
The essence of the OPB121B lies in its ability to provide accurate and reliable object detection in a wide range of applications.
Packaging/Quantity
The OPB121B is commonly available in reels containing a specific quantity, typically suited for mass production and industrial applications.
Specifications
- Operating Voltage: 4.5V to 5.5V
- Output Type: Phototransistor
- Sensing Distance: Up to 0.2 inches (5mm)
- Operating Temperature Range: -40°C to 85°C
- Package Type: Through Hole
Detailed Pin Configuration
The OPB121B features a standard 4-pin configuration: 1. Anode of Infrared LED 2. Cathode of Infrared LED 3. Collector of Phototransistor 4. Emitter of Phototransistor
Functional Features
- Utilizes infrared light for object detection
- Provides a digital output based on the presence or absence of the detected object
- Fast response time
Advantages and Disadvantages
Advantages
- High sensitivity
- Compact size
- Reliable performance in various environmental conditions
Disadvantages
- Limited sensing distance
- Susceptible to ambient light interference
Working Principles
The OPB121B operates on the principle of infrared light reflection. The infrared LED emits light, which is then reflected off the object being detected and received by the phototransistor. The presence or absence of the reflected light is then converted into a digital output signal.
Detailed Application Field Plans
The OPB121B is widely used in the following applications: - Object detection in automated machinery - Paper detection in printers and copiers - Proximity sensing in consumer electronics - Robotics and automation systems
Detailed and Complete Alternative Models
Some alternative models to the OPB121B include: - OPB350 - TCRT5000 - GP2Y0A21YK
In conclusion, the OPB121B optical sensor offers a compact and reliable solution for object detection in various applications, despite its limitations in sensing distance and susceptibility to ambient light interference.
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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací OPB121B v technických řešeních
What is OPB121B?
- OPB121B is a reflective object sensor that consists of an infrared LED and a phototransistor.
How does OPB121B work?
- The infrared LED emits light, which is then reflected off an object and detected by the phototransistor, allowing it to sense the presence or absence of the object.
What are the typical applications of OPB121B?
- OPB121B is commonly used in applications such as object detection, counting, and position sensing in various technical solutions.
What is the operating voltage range for OPB121B?
- The operating voltage range for OPB121B is typically between 4.5V and 5.5V.
What is the sensing distance of OPB121B?
- The sensing distance of OPB121B can vary based on the specific application and environmental conditions, but it is generally in the range of a few millimeters to a few centimeters.
Can OPB121B be used in harsh environments?
- OPB121B is not designed for harsh environments and may require additional protection if used in dusty, humid, or corrosive surroundings.
What is the output type of OPB121B?
- OPB121B provides a digital output, typically in the form of an open-collector transistor.
Is OPB121B sensitive to ambient light?
- OPB121B is designed to minimize the effects of ambient light, but excessive ambient light can still affect its performance, so proper shielding and filtering may be necessary.
Can OPB121B be used for speed sensing?
- OPB121B can be utilized for speed sensing in certain applications, particularly in conjunction with rotating or linearly moving objects.
Are there any special considerations for mounting OPB121B?
- It's important to mount OPB121B securely and ensure proper alignment between the LED and the phototransistor for reliable operation. Additionally, minimizing external interference and reflections is crucial for accurate sensing.