this post was submitted on 04 Jul 2023
27 points (100.0% liked)

Ask Electronics

3307 readers
3 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
 

Mates bread maker stopped working so I had a look inside and saw this burned resistor.

I'm guessing the heat changed the colors a bit so wondering if anyone has experience in reading cooked resistor values.

I removed it from the PCB and measured it at 403 Ohms.

Thanks for any help.

you are viewing a single comment's thread
view the rest of the comments
[–] WaltzingKea@lemmy.nz 3 points 1 year ago (1 children)

The case is basically fully metal, just a bit of plastic inside for mounting the PCB to and a few other bits of plastic outside. Plus there is a temperature fuse in the case also.

From the resistor size (11.5 x 4.5mm) I think it would have been a 2W resistor when comparing to sizes on Digikey. I made a 500 Ohm 2W resistor from 8 1/4W 1K resistors then put a larger resistor in parallel to that to bring it down, measured it to 489 Ohms.

I'm going to run it a few times then open it up again to see if there is any new damage to the board before returning it.

[–] Saigonauticon@voltage.vn 2 points 1 year ago (1 children)

Sounds like science! Let us know what happens.

[–] WaltzingKea@lemmy.nz 1 points 1 year ago (1 children)

Four loafs of bread later with no issues, opened it up and everything looks fine :)

[–] Saigonauticon@voltage.vn 1 points 1 year ago

Excellent news!

The science gets done, and we bake a fresh bun, for the people who are still alive!