engineering concept on pastel paper with opened notebook pages and led light bulbs, soldering iron, pcb, bulbs, insulating tape

3d abstract blank board bulb bulbs cable canvas circuit cleat collage color colored colorful concept cooling copy creative electric electricity empty energy fleecy illustration insulating insulation iron lamp light lighting linen multi no notebook notepad off open paper pastel peope plug powersave printed radiator saving socket soldering space tape terminal turned velvet white wire