Roborear

A line follower robot does NOT actually see the line like a camera.
Instead, it uses IR (Infrared) sensors to detect light reflection from the surface.

Here’s how it works:

✅ 1. IR Sensors Emit Infrared Light

Each IR sensor has:
👉 IR LED → sends out invisible infrared light
👉 Photodiode/phototransistor → reads how much light comes back

This pair together detects how reflective the surface is.


✅ 2. White Surface Reflects IR Light

White returns a lot of IR light, so the sensor reads:
👉 High reflection / High analog value / “1”


❌ 3. Black Line Absorbs IR Light

Black absorbs most IR light, so almost nothing comes back:
👉 Low reflection / Low analog value / “0”

This contrast is what the robot uses.

3 weeks ago | [YT] | 2

Roborear

Which drone brand is the most popular worldwide?

3 weeks ago | [YT] | 0