Datasheet - Yl-105

In this post, we’ll break down everything you need to know: pinout, specifications, typical applications, and how to safely interface it with microcontrollers. The YL-105 is a laser diode module that emits a visible red beam (typically 650nm wavelength). Unlike a simple laser pointer, this module is designed for electronic control — you can turn it on/off digitally or modulate the beam at high speeds (useful for data transmission).

void loop() digitalWrite(laserPin, HIGH); // Laser ON delay(1000); digitalWrite(laserPin, LOW); // Laser OFF delay(1000); yl-105 datasheet

| Pin | Label | Description | |-----|-------|-------------| | 1 | VCC | 5V DC input | | 2 | GND | Ground | | 3 | SIG | Signal input (active HIGH: laser ON) | In this post, we’ll break down everything you