This is a very small light sensor .It is called light sensor or photocell or LDR (light dependent sensor) or photo-resistor.A photocell changes resistance depending on the amount of light it is exposed to.These little sensors make great ambient light triggers (when light in the room turns on, ..
Description:Portable, stable and durable.Can be welding 18650/26650/32650 battery, it is portable, stable and reliable.According to different configurations, the thickness can be about 0.1MM-0.15mm.This spot welder circuit board can be used for welding lithium batteries such as 18650/26650/32650.Thi..