12v power supply with overvoltage protection

Discussion in 'Homework Help' started by bulgaa, Nov 8, 2010.

  1. bulgaa

    Thread Starter New Member

    Nov 8, 2010
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    Hello. Can anyone show the 12v power supply with overvoltage protection. I really need it.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    That is hard to do. You do not state your power source or the required output current. If it's low current, the data sheet for a 7812 (use LM7812 as a search term) will bring up what you need. The overcurrent is a bit crude, though - if it gets too hot, the pass element shuts down.
     
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    He wants overvoltage protection. Overcurrent was not mentioned.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    Overvoltage protection is typically accomplished by using an SCR crowbar circuit. I could describe the technique here, but there are numerous articles describing them available on the Internet. Google is your friend.
     
  5. bulgaa

    Thread Starter New Member

    Nov 8, 2010
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    0
    but i didnot found any. give me schema with components pls
     
  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    This is homework. We don't give away answers here. You have to show your work, and tell us where you are getting stuck.

    What are you entering into your search engine? There are lots of free answers on the web.
     
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