5-250mW 405nm Blue-purple Laser Drive Circuit Board for Blue-purple Laser Pointer

Design Features:

Circuit control: 5.5V step-up circuit,constant voltage output

Size: 20mm (L)*9mm (W)

Reverse Connection Protection:The unique design of the reverse connection protection, don't need worry about burning plate when batteries put in the wrong way.

Quick Start Protection: With soft start protection, even though you turn on or turn off power supply frequently, it won’t  damage the laser diode.

Pin Definition:

The pad is designed for 405nm drive plate, you only need to weld according to the pin arranged in triangle , not like the other plate, to cut off one foot, or staggered welding.

Polar Definition:

Module shell is positive, back ends pad is negative. It is recommended that use  3.7V lithium battery (such as 16340 /18650 /14500 and 18500) , or use 5.5V DC power supply directly.