Everything you need to know about TTL + PWM and how to control the laser - YouTube
PWM To TTL Transition Module Laser Cutter Engraver Control Board Accessories for Eleksmaker Mana SE Controller TTL Modulation - Price history & Review | AliExpress Seller - Yveet Store | Alitools.io
Amazon.com: 12V Green Diode Lasers 532nm Laser Module Dot with TTL 0-30KHZ & Fan Cooling - Long Time Working : Industrial & Scientific