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 ...
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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 describes a signal that is treated as active, asserted or 'on' when it sits at a low voltage near ground, rather than at a high voltage. It applies to inputs, outputs and control lines (such as reset or chip-select), so it matters when wiring devices so that signal levels are interpreted as intended.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- 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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