Description
Specifications
On the front side, this module has an infrared emitter/receiver, an adjustable potentiometer, a LM393 differential comparator, and an indicator LED. The back side has 4 resistors, two of which are 10 kΩ, one is 1.5 kΩ and the other one is 220 Ω.
The KY-033 has 3 pins: GND, OUT, and VCC. The output pin of the module is digital, its state is HIGH when the module is on top of a black surface, signaling that a line is detected. The state is LOW when the module is on top of a white surface, signaling that a line is not detected.
The indicator LED turns on when the infrared light is reflected back to the receiver, meaning that a line is not detected.
| Working voltage | 3.3V — 5.5V DC |
| Output signal | TTL level (high level if line detected, low if no line detected) |
| Board Size | 1cm x 4.2cm [0.39in x 1.65in] |
