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Author Topic: Intentionally tried to blow up a 78XX before ?  (Read 1716 times)
DavenPaget
Posts: 1400


Dave.S / Dave Seether


Intentionally tried to blow up a 78XX before ?
« on: November 03, 2011, 09:59:23 AM »

UPDATE : My power supply didn't go into protection , the chip's gone !  icon_mrgreen


Who ever said that it was internally current limited ?  Tongue
Power supply : 12V @ 2A
It became so hot that it reflowed the blob of solder i thrown on the tab !
<a href="http://www.youtube.com/watch?v=f867EicAi44" target="_blank">http://www.youtube.com/watch?v=f867EicAi44</a>
« Last Edit: November 03, 2011, 10:33:22 AM by DavenPaget » Logged

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slacker
Posts: 4837

Ian M. - England


Re: Intentionally tried to blow up a 7812 before ?
« Reply #1 on: November 03, 2011, 10:14:38 AM »

I've accidentally tried it with 7805s shorting the output to ground, they get hot as hell with no heatsink but they don't blow up and work fine afterwards.

Looking at the video you've got it wired up backwards, so it's no surprise it didn't work properly, check the datasheet.
« Last Edit: November 03, 2011, 10:20:31 AM by slacker » Logged
DavenPaget
Posts: 1400


Dave.S / Dave Seether


Re: Intentionally tried to blow up a 7812 before ?
« Reply #2 on: November 03, 2011, 10:26:45 AM »

I've accidentally tried it with 7805s shorting the output to ground, they get hot as hell with no heatsink but they don't blow up and work fine afterwards.

Looking at the video you've got it wired up backwards, so it's no surprise it didn't work properly, check the datasheet.
I did it on purpose anyway , I knew it wouldn't work as intended , this chip has been faulty from day 1 .
But the main purpose was to make it smoke  Grin
Simply speaking , i sent 2A through the input and ground . and grounded it from the output .
That would be directly sending that amount of power through the input and to ground and then letting it leave from the output , therefore it will try to regulate and end up turning into a heater .
I should have allowed it to try powering up my MASSIVE alpine amp .
It's amazing how long it lasted . 1 hour of 2A going through it .  icon_mrgreen
« Last Edit: November 03, 2011, 10:32:50 AM by DavenPaget » Logged

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DavenPaget
Posts: 1400


Dave.S / Dave Seether


Re: Intentionally tried to blow up a 78XX before ?
« Reply #3 on: November 03, 2011, 12:28:13 PM »

I will blow up a crappy TO-92 transistor next time , shot with a DSLR .
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CynicalMan
Posts: 1613


Alex L. - Canada


WWW
Re: Intentionally tried to blow up a 78XX before ?
« Reply #4 on: November 03, 2011, 02:03:31 PM »

<a href="http://www.youtube.com/watch?v=fxENMvspTsI" target="_blank">http://www.youtube.com/watch?v=fxENMvspTsI</a>
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DavenPaget
Posts: 1400


Dave.S / Dave Seether


Re: Intentionally tried to blow up a 78XX before ?
« Reply #5 on: November 03, 2011, 02:08:42 PM »

<a href="http://www.youtube.com/watch?v=fxENMvspTsI" target="_blank">http://www.youtube.com/watch?v=fxENMvspTsI</a>
I am pretty much a amateur when it comes to blowing things , yes i've seen rodalco's videos since 2009 .
I fuse silicon not some fruitz .
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nexekho
Posts: 374


Re: Intentionally tried to blow up a 78XX before ?
« Reply #6 on: November 03, 2011, 04:54:40 PM »

http://www.youtube.com/photonicinduction
Guy's some kind of electrician contractor, blows stuff up for fun.  Blew up a cocanut on 300kv etc.  Also done several videos in which he runs that kind of voltage through everyday equipment.
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I made the transistor angry.
DavenPaget
Posts: 1400


Dave.S / Dave Seether


Re: Intentionally tried to blow up a 78XX before ?
« Reply #7 on: November 03, 2011, 10:06:01 PM »

http://www.youtube.com/photonicinduction
Guy's some kind of electrician contractor, blows stuff up for fun.  Blew up a cocanut on 300kv etc.  Also done several videos in which he runs that kind of voltage through everyday equipment.
Yep , i pretty much got my idea from him .
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