15W 450nm Blue Laser Driver Board with TTL for DIY engraver module

15W 450nm 15000mw Blue Laser Driver Board with TTL for DIY laser engraver 15W laser module 

• Circuit control: 12V step-down circuit, constant current output (current and voltage are adjustable)
• Output Specifications: Max 5A
• Scope of application: 15W blue laser drive circuit
• Dimensions: 46*80mm (width * length), component height with aluminum base 26m
• Modulation voltage: 0-5V (0V off, 5V on)
• TTL modulation description: 0-5V voltage signal (0 is off, 5 is on, frequency determines the speed of laser light flashing), positive and negative as shown below

1*15W laser driver ​1*laser cable