Laser

405mn laser is one of the most important part of exposer. I bought laser from Aliexpress, according to description it has 1W power (really it is not true). Laser is powered by 5V and doesn't have any input for the fast control. Schematic should be modified little bit to be useful for the exposer.

Laser has the boost converter inside and current source, which provide current about 140mA - it means laser power consumption is about 0.7W. In the order to get fast control one capacitor should be removed and control pin should be added according to schematic diagram.