closeup of black resistor trimmer and photoresistor with sensitive surface in a green pcb

electronic component circuit photoresistor resistor trimmer closeup board pcb potentiometer green optoelectronics detail ewaste blur macro photocell lightdependent ldr photoconductive cell photoconductivity resistance sensitive surface preset trimpot adjustable small red squiggle printed copper layer electrical device equipment semiconductor metal terminal engineering electrotechnical electrotechnology optronics industry technology repair service texture brown black 16x9 miniature passive element electric disassembled industrial electronics science technical maintenance spare supply electrotechnics background recycling disposal white yellow orange components blurred detail