Guess there's a reason this power supply was so cheap...

[Scruffie]

Just working on a 12V 5840 overdrive, all set up fine on the breadboard and working happily... the input jack wire came loose though and I was just putting it back when *BANG*

Here's the power supply in the wall...



and here's the rest of it about a metre away from the wall...



Supposedly it was meant to deliver 1A, so it shouldn't have been struggling to power anything and nothing was even close enough to short, sufficed to say it made me jump a little 

[gjcamann]

looks like the fuse worked as designed. 

[Jdansti]

That was one if those audible fuses. It's a feature.

[Scruffie]

That was one if those audible fuses. It's a feature.

of course! How foolish of me, also one of those 'nearly smacked in the face with the power supply' to let you really know it needs attention.

I guess I did get a 1N4007 out of it... that blew clean out the circuit board without a mark.

[Jdansti]

It might be worth a little forensics to make sure you don't damage another supply.   I wonder if it was only the diode that blew, and when it did, it mechanically took out the fuse.  Was the diode on the primary side of the transformer or after the regulator? 

[Scruffie]

Not sure I want to investigate an SMPS power supply that just exploded... seems a tad dangerous.

Think i'll just avoid £3 supplies and get a decent transformer based one, i'm now powering the heaters from my 300mA 12V supply and the plates from another one and it's fine, no warm transformer, nothing going bang.

[Jdansti]

You definitely don't want to plug it in again! Your probably OK if the replacement supply is working fine.

[Scruffie]

You definitely don't want to plug it in again! Your probably OK if the replacement supply is working fine.

There's not a lot to plug in! Haha, a plug with 2 wires hanging out does not a power supply make.

It is although i'm a little nervous of it happening again anyway lol, looking in to something a bit more 'permanent' preferably with an explosion protection circuit.

[duck_arse]

are they dobs of ex-molten metal on the white mains switch? nice.

[GibsonGM]

Look on the bright side - you've got  a really cool LED out of the deal, lightly used and ready to put in a pedal!!    ;o)

[Scruffie]

are they dobs of ex-molten metal on the white mains switch? nice.

Plastic but still!

Look on the bright side - you've got  a really cool LED out of the deal, lightly used and ready to put in a pedal!!    ;o)

yayyy, I wonder if it survived.

[duck_arse]

it's taken me until today to realise, what you have there is a "burst box".

I'm surprised jd missed it.

[petey twofinger]

got an "energizer" battery charger with a wall wart marked 16v 6 a yesterday for 1.99 at good will , it honestly looked brand new . plugged it in , the meter read 13.3 , i go "huh" smoke starts SCREACHING out the thing .... it may be called magic smoke , but the aroma is far from enchanting ... best part , they take returns with reciept . i cut the cable ( keeping that for my trouble ) just to be safe

[duck_arse]

they'll want the smoke back as well.

[Jdansti]

it's taken me until today to realise, what you have there is a "burst box".

I'm surprised jd missed it.

Dang! 

[boogietone]

they'll want the smoke back as well.