Thursday, 17 January 2019
LED COB Chip 220V 20W Review
Wiring seemed pretty straight forward, just solder the appropriate rated cable to these welding points as shown in the above image, apply voltage and lets see what happens.
Well actually no, I had a some concerns:-
- that's 240V mains voltage on exposed terminals
- 20W on something so thin ? I need find some way to dissipate heat.
Solve the Problem No2 First: Heat Dissipation.
Result: After removing the mains, did the "carefully feel the heatsink" method, happy to say the heatsink felt only slightly warm. At this point I should mention Do Not Look Directly at the COB when it is powered on.
Solving Problem No1: Exposed 240V Terminals.
I'm really pleased how this small project worked out, especially re-purposing old light fittings I would normally have thrown away. I am in the process of buying more of these 20W COBs even though I cannot think of where they are to be used. As always the trick to doing this type of project comes down to appropriate case/fitting that adequately mounts for both COB and heatsink, with safe termination while still looking good.
Note, the heatsink was significantly warmer after a time when mounted inside the light fitting.
Another enjoyable ride, I'm well used to going down this route. There are some places where the road doesn't allow a car and a cyc...