What colour are the leds underneath the phosphor of this cob led?
This 5W COB (Chip on Board) LED has a circular layer of phosphor impregnated jelly poured over the array of…
How to take the curl out of pvc coated equipment wire
Using fluted plastic board to de-curl PVC coated equipment wire
12v wireless 315 mhz remote control relay board 6-channel
There are lots of different versions of this wireless remote control relay system on eBay. From single channel units up…