1W 1.6W 3W 445/520nm Dual Lithium 450nm Blue Laser Diode Driver PCB Board Circuit 12V 3A Step-down Constant Current DIY

Features:
Circuit control: 5V step-down circuit, constant current output, guarantee 5.8-12V power supply through light output stability

Dimensions: 10.2*22mm (width * length)

Reverse connection protection: unique reverse connection protection design, do not worry about the battery is reversed and burned

Pin definition: The pad designed for the 445nm driver board, you only need to be naturally welded according to the triangle of the foot.

Polarity definition: the module case is positive and the tail pad is negative. Please refer to this link for soldering instructions.

Warning: In order to ensure safety, it is recommended to use two 3.7V lithium batteries with protective plates (16340, 18650, 14500 and 18500). Do not use inferior batteries, because of the internal resistance capacity and discharge performance of the dual lithium. High requirements, especially for the use of three or more cylindrical lithium batteries without protective plates, many friends may often use three sections without any explosion accidents, if three sections are used, one of which has large internal resistance, fast discharge, and over discharge And all the buck chips start working at 5.8-6V, even if there is undervoltage protection, it will not help, the circuit is out of control, it will directly lead to short circuit and can explode, the power of steel shell is very large, of course The percentage of possibilities is not large, but as long as it happens, the consequences are unimaginable!

You can use a 6-30V DC power supply directly, or use two or three strings of polymer lithium batteries, the polymer is currently the safest of all lithium batteries.

Package:
1* 1W 1.6W 3W 445/520nm Dual Lithium 450nm Blue Laser Diode Driver PCB Board Circuit 12V 3A Step-down Constant Current DIY