My friend gave me his broken mini fridge for free. I suspected it had blown its fuse, which was correct.
The fridge runs on 0,55A and I tried different size fuses up to 0,8A but the thing blows them instantly as I hook it up.
What could be causing this?
Btw in my last thread people were laughing at me for thinking this thing has a fuse, calling me a retard. Just because you can't locate it in the pic doesn't mean it doesn't exist.
Is the peltier working?
check transistors and diodes
...
It's not a peltier fridge. This is some cheap fucker that uses a fan. I have no idea how that can even work.
I have another fridge that is peltier operated and it works like a charm unlike this one.
That's clearly not just a fan
There’s no way to cool below ambient without some sort of heat pump, are you sure?
it is peltier
anyway, check the transistors on the heatsinks
sometimes transistors fail short
As far as I know a fan + aluminum cooling plates can cool a very small box.
A peltier fridge wouldn't need a fan for anything, and they have an open metal plate visible on the inside of the fridge.
>A peltier fridge wouldn't need a fan for anything
wrong, good ones have a fan
thermoeletric cooling is super inefficient, it needs a fan to keep the hot side from blowing up
this is a perliter fridge, now stfu
People only buy this technology because it doesn't make any sound. I know a few people who are so autistic they can't stand a fridge humming.
A fan whirring would defeat the purpose.
>good ones have a fan
I'm pretty sure OP's fridge isn't good.
back to plebbit pls
>the thing blows them instantly as I hook it up
You have a short somewhere and the fuse is working as intended. Get your multimeter and track it down.
Just jump the fuse. Watch for flames. If you have a wattmeter, hook that up.
>Hummmmm of compressor
vs
>Consistent small fan
There's a huge difference.
Dont be a cheapskate just throw it out and buy another one, Christ Fucking H Jesus, become like other people and say "fuck it, is it even worth the effort"
Wtf is all that crap? My socialist fridge has an analog thermostat, and that's it. Has been working fine for 30 years.
A fan+heatsink alone will never cool anything below room temperature
Niggers don't understand thermodynamics, don't even try.
you forgot one, user: this little chip in the pic has a hole in it.
oh, you're right it's a little melted hole.
i didn't examine it close enough.
i thought it was a little drop of water
unfortunately for OP none of those chips look like they have any markings on them.
>unfortunately for OP none of those chips look like they have any markings on them.
yeah, op is up shit creek with this fridge unless he can find the spec sheet for this board.
>just throw it out and buy another one, Christ Fucking H Jesus, become like other people
No wonder America is going down the drain when people are this stupid.
One component, worth less than one CENT, gets busted and people are ready to throw the fucking thing out.
"Hey it's just 200 bucks and some more plastic in the ocean, who gives a shit"
OP here.
Checked the underside as well. The area under the big capacitors looks fishy.
Doesn't look shorted though
they will have markings on the underside. fun times with the soldering iron ahead.
>man cave
Jesus christ, grow up
a nice trick i just learned recently: cover all suspected-to-be-faulted components with soldering paste. a thin layer ontop, just dont short the legs.
remove the fan and whatever else plugs into the board (except VCC/GND input)
you say your 0.8A fuse trips. when you short it, the leakage current will cause the failing component to heat up rapidly, and the soldering paste will turn to feint white smoke. locate the source of the smoke (or check where your PCB is hottest), and you will find your fault.
get some solder wick and an iron and desolder that motherfucker, look for numbers on the underside. if you find them, buy one of the same part on ebay, make sure to solder it in the right orientation with the little notch facing the same way as in the photo. clean up solder joints with wick after the fact to embiggen life. install a heat sink on top of it to further embiggen life.
if you can't find the part, check the voltage of the peltier module and find an identical power supply module on ebay, buy it, and rig it up in place of the fried one (watch polarity, btw!).
t. consumerism
or wave your hand over it to feel the thermal radiation
which, considering the size of the components, is probably easier to do. I've only been working with SMD parts recently, can't really feel how hot a
if you are working with SMD you can afford a FLIR or some shit
this post was made by THT gang
>t. consumerism
user is arguing against rampant consumerism user.
no I'm a ghetto developer so i must ghetto methods for development. so far ~50,000 of my devices were produced and sold, so it cant be all bad.
inb4 oven sand box paste soldering
nah, I do system integration as service, so design, layout, routing etc, plus firmware. production is done in guess which country. prototyping is also done by sort-of-a-factory, but when the prototypes fail I sometimes need to get creative.