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LED-lampor håller (inte) för evigt4 comments to LED-lampor håller (inte) för evigt |
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I forgot to put an UPDATE here:
After yet another of the bulbs had failed I replaced them with IKEA-branded 3W E15 LED bulbs about 1 1/2 years ago.
The advantage of that design is that difference between having one led in series or not is so low that you can just bridge the burn LED and still get almost all light from them.
Disadvatages are the live connection of circuit, big inrush currents and lack of proper current control…
…but you still can bridge that “black-spot” LED and use it normally… if you won’t touch it by accident, leave it without cover, to operate a bit colder (they are usually way too hot)
A very poor replacement for a fuse indeed…
The 1 ohm resistor is for cheaper replacement for the fuse. Although one of the LED’s is dead, the rest most likely is still alive as the LED chip self-destruct. I use those old LED bulbs as cheap source for parts.