Laser Module - Red with TTL Control - COM-08654 - SparkFun Electronics
How to Use Laser Module – NEJE
Wholesale 500mW 405nm 12V Laser Module Laser Engraving Machine part Laser Head, with TTL PWM, can control laser power and adjust focus From m.alibaba.com
Control Board Laser Machine | Laser Module Ttl Control | Pwm Board Laser - Woodworking Machinery Parts - Aliexpress