Edn is leading source for reliable electronics design ideas, articles, . automotive design, communications and networking design, consumer electronics design, integrated circuit design, led design, medical electronics design, electronics power management design, sensor design, electronic systems design, . light bulb .Teardown inside w led light bulb. margery connermarch , . tweet. save follow. save to my library follow comments follow author. . tess has announced plans to offer w bulb and will probably use the same pcb (printedcircuit board) by adding two more leds on the empty pads. . how to design led signage and led . Peek into the philips led bulbs electronics and the w, dimmable pharox contrasts two approaches in how bulb handles the . led bulbs reveal different design approaches. margery connerapril , . tweet. save follow. save to . figure shows view of pcb (printedcircuit board) from handsoldered cfl. the big . Printed circuit board designs. free viewmate gerber viewer from pentalogix . standard metal core star board for duris . duris is offered in two different versions at two different lumen levels. having the same footprint for both versions provides the flexibility to use the same board to evaluate both . applications such as mr .