Should there be anyproblem please feel free to contact us first , we will do our best to resovle it .
Drive motor potentiometer adjust current ?the clockwise is big and counter-clockwise is small (it is circulatory)
The motor current can not exceed 2A, 1A or more to work long hours, please do the cooling.Power inside is positive and outside is negative, The item can work : 7.5V-12V(Voltage will affect the laser effect)
Jumper need connect ADJ,adjust the voltage regulator module can control the laser voltage ?it can be used with voltmeter )
5V laser module must connect jumper with ADJ,adjust the output voltage of less than 5V ,Then Laser modules can be connected.