I have finally collected all the goodies from around the world and have assembled the same. I have:
- 12V TTL 200mW To 2W 445nm 450nm Laser Diode LD Power Supply Driver Board (984552) which is described on the PCB as “GOOD LASER A-11”
- NDB7875 9mm 445nm Blue Diode in Copper Module W/Leads & 405-G-2 Lens sourced from DTR Laser shop.
I splashed out and went with the “better” lens which might have been a mistake.
Using this setup the laser only starts coming into focus when the lens is less than 10mm (1/2") from the target certainly not 55mm as described in the write up.
Is this the expected focus point for the G2 lens, if so I will buy the 3 element one listed in the write up?
In my hands the second Chinese (via Bangood) laser driver behaved as described with the LED going off when the current potentiometer was turned ant1clockwise. My first module (at the price I bought 2!) didn’t turn off but only dimmed. It subsequently stopped working.