Elecrow
4 Channels IR Reflective Sensor
This Elecrow 4-channel IR reflective sensor module combines four infrared emitter/receiver pairs with a mainboard that processes all signals. When an object ...
This Elecrow 4-channel IR reflective sensor module combines four infrared emitter/receiver pairs with a mainboard that processes all signals. When an object enters the detection range, the corresponding channel outputs a low (TTL 0) signal and its indicator LED lights up. Each channel has an onboard potentiometer for adjustable detection range from 1mm to 60cm.
The module runs on 3.3V to 5.5V, making it compatible with both 3.3V and 5V microcontrollers. It is well-suited for robotics applications such as line following, edge detection, and obstacle avoidance.
Key Features
- 4 Independent IR Channels – Each channel has its own IR emitter, receiver, indicator LED, and sensitivity potentiometer
- Adjustable Detection Range – 1mm to 60cm, tuneable via onboard potentiometers
- TTL Digital Output – Low (0) when object detected, high (1) when clear
- Wide Voltage Range – 3.3V to 5.5V supply
- LED Indicators – Visual feedback for each channel's detection status
Specifications
- Supply Voltage – 3.3V to 5.5V
- Supply Current – >1A recommended
- Detection Range – 1mm to 60cm (adjustable)
- Output – TTL digital (active low)
- Channels – 4
Ideal For
- Line-following robots
- Edge detection
- Obstacle avoidance
- Omni-directional object sensing
Package Contents
- 1× 4-Channel IR Reflective Sensor Module
Jargon buster
Plain-language definitions for the technical terms used above.
- active LOW
- Active LOW means an input is considered switched on when it is connected to a low voltage or ground. This matters when wiring buttons, switches, or other trigger signals so the board responds in the expected way.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- potentiometer
- A variable resistor usually turned with a knob or shaft to create an adjustable electrical signal. It is often used for inputs such as volume, brightness or position, so it helps beginners learn how a microcontroller reads changing values.
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