What have you learned today?

[Gordon_4]

Some bs (bulb shit) -




@TubelabCom 6 days ago
I have dissected several dead LED bulbs to see what died. It is rarely the LED's themselves. There is an electronic circuit inside that regulates the amount of current flowing through the LED's. It uses several components, but there will be one or two "electrolytic capacitors." Good quality capacitors have lifetime vs operating temperature specs, and often the temperature for the specified lifetime is included on the outer heat shrink label. The common numbers are 85C and 105C. I have never seen a temp rating on the capacitors used inside an LED bulb, probably because they are poor quality. Every dead bulb that I opened had a dead capacitor, often dead enough to be leaking its electrolytic paste. Bulbs that are mounted upside down are worse case as the heat from the LED's rises to cook the circuit board. LED's do generate a little heat. The bulb here on my desk had 24 small LED's mounted on a thin circuit board that was attached to an aluminum heat spreader. It lived for almost 8 years in a ceiling can upside down before dying of dead capacitor syndrome.

Soooo, Penny pinching/planned obsolescence strikes again?

 

[hanselthecaretaker2]

Color me curious -

A Test Told Me I’m Basically Made of Plastic. You Probably Are Too

BPA and phthalates are everywhere. A new test can reveal how much of both are in your body.

time.com

I’ve been drinking a tall Core water every weekday for the past few years and I’m wondering what my levels are. Really considering cutting back and/or changing some habits regarding plastic usage. Already cut out reheating stuff in plastic Tupperware. Will probably switch to filtered tap water in a stainless steel tumbler in the meantime.

 

[Johnny Novgorod]

Rhinos can grow their horns back but elephants can't grow their tusks back.

 

[Kyrian007]

Some bs (bulb shit) -




@TubelabCom 6 days ago
I have dissected several dead LED bulbs to see what died. It is rarely the LED's themselves. There is an electronic circuit inside that regulates the amount of current flowing through the LED's. It uses several components, but there will be one or two "electrolytic capacitors." Good quality capacitors have lifetime vs operating temperature specs, and often the temperature for the specified lifetime is included on the outer heat shrink label. The common numbers are 85C and 105C. I have never seen a temp rating on the capacitors used inside an LED bulb, probably because they are poor quality. Every dead bulb that I opened had a dead capacitor, often dead enough to be leaking its electrolytic paste. Bulbs that are mounted upside down are worse case as the heat from the LED's rises to cook the circuit board. LED's do generate a little heat. The bulb here on my desk had 24 small LED's mounted on a thin circuit board that was attached to an aluminum heat spreader. It lived for almost 8 years in a ceiling can upside down before dying of dead capacitor syndrome.

I'm very lucky I switched over to LED's when I did. While they were still building them to last. I replaced all the bulbs in the house I used to live in, about 15 years ago. I've never had one burn out. When I moved out, I took them all with me. They all still work, and I still have the spares as my apartment needs many fewer bulbs than my house did. I haven't bought a light bulb in over a decade.

 

[gorfias]

Sorry if this already posted. Pretty cool.

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