Yl-105 Datasheet -

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).

If you’re diving into Arduino or robotics projects involving laser communication, tripwires, or target detection, you’ve likely come across the YL-105 — a compact, 5V laser transmitter module. While the module is popular among hobbyists, finding a clear, consolidated datasheet can be tricky. 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