this post was submitted on 01 Apr 2024
125 points (97.7% liked)

Ask Electronics

3258 readers
2 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.


founded 1 year ago
MODERATORS
 
all 14 comments
sorted by: hot top controversial new old
[–] [email protected] 57 points 5 months ago (1 children)

This is called an LER. Light Emitting Resistor.

[–] [email protected] 17 points 5 months ago

I think it's just an incandescent light nubbin at this point.

[–] [email protected] 23 points 5 months ago (1 children)

It's not white hot yet. I think we still have a few MHz of headroom.

[–] [email protected] 3 points 5 months ago

Maybe add a few hundred amps as well.

[–] [email protected] 22 points 5 months ago (1 children)

I was servicing an arcade game room at a campground, and had a Cruis'n USA in which the picture looked a bit dim. I take the back panel off of the game, and see a 2cm hole burned through the Sharp Image monitor's chassis (circuit board) where there presumably used to be a resistor. It was still working, nobody complained about smoke or a smell?!

[–] [email protected] 7 points 5 months ago

A lot of kids, a lit of screaming, yelling, cheering... no wonder 🤷.

[–] [email protected] 12 points 5 months ago (1 children)

It's ok to be a little burnt out through-hole resistor, you just need to stop being under so much voltage. You don't need to carry all that current.

More Current!

Resistor, No!

MORE CURRENT!

[–] [email protected] 4 points 5 months ago

evil laugh while resistor melts...

[–] [email protected] 11 points 5 months ago* (last edited 5 months ago)

Light emitting resistor.

[–] [email protected] 8 points 5 months ago (1 children)

That's the igniter for the afterburner, you ain't seen nothin' yet.

[–] [email protected] 4 points 5 months ago

Just as soon as it hits operating temperature it'll ignite and woosh!