IR Proximity Sensor Module (with Adjustable Preset)

Description

The IR Proximity Sensor Module is a fundamental building block for DIY robotics and automated detection systems. It utilizes an infrared emitting diode alongside a photodiode receiver to detect the presence and distance of reflective obstacles in front of it. When the emitted infrared light hits an object, it bounces back into the receiver, triggering a digital output response.

Available now at Tomson Electronics, this specific board features an onboard LM393 voltage comparator and a highly useful built-in potentiometer (preset). This preset allows you to manually tune the sensor's detection threshold, effectively adjusting its sensitivity and sensing range to suit your specific project environment. With a wide operating voltage of 3.3V to 5V, it interfaces seamlessly with 3.3V microcontrollers like the ESP32 and STM32, as well as standard 5V logic boards like the Arduino Uno.

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Specifications

• Sensor Type: Infrared Emitter / Receiver Pair
• Comparator Chip: LM393 (Provides stable digital output)
• Operating Voltage (VCC): 3.3V to 5V DC
• Detection Range: Approximately 2cm to 30cm (Adjustable via onboard preset)
• Output Type: Digital (Outputs LOW when an obstacle is detected, HIGH when clear)
• Detection Angle: ~35 degrees
• Indicators: Onboard Power LED and Output Status LED

Applications

• Mobile Robotics: Serving as the primary "eyes" for obstacle-avoiding chassis or autonomous maze-solving robots.
• Line Following: Detecting the contrast difference between black and white surfaces for line-follower bots.
• Industrial Prototyping: Building automated photoelectric counting systems for conveyor belts or assembly lines.
• Security & Automation: Creating simple intrusion alarms or touchless automated hand sanitizer dispensers.

Frequently Asked Questions (FAQ)

Q: How do I adjust the detection range?
A: The board features a small blue potentiometer (the preset). Using a precision flathead screwdriver, slowly turn the dial while placing an object in front of the sensor. The onboard Output LED will light up when the threshold is crossed, allowing you to dial in the exact distance you need.

Q: Will this sensor work perfectly outdoors in bright sunlight?
A: IR sensors can struggle in direct sunlight because the sun emits a massive amount of infrared radiation, which can flood the photodiode receiver and cause false triggers. For outdoor robotics, ultrasonic or LiDAR sensors are generally recommended instead.

Q: Can I measure exact distances (like 15.5 cm) with this board?
A: No. Because this board relies on an LM393 comparator, it provides a Digital output (0 or 1). It only tells the microcontroller "Yes, there is an object within range" or "No, the path is clear." If you need precise distance measurements, look into an Ultrasonic Sensor (HC-SR04) or a Time-of-Flight (ToF) sensor.

Package Includes

• 1 × IR Proximity Sensor Board (with adjustable preset)