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bipolar_12v_psu [2009/03/08 03:10]
nebula reorganized for hierarchal headings, cleaned up some language
bipolar_12v_psu [2010/02/28 16:46] (current)
nils
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 ===== Three Methods ===== ===== Three Methods =====
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 ==== Center Tap Transformer ==== ==== Center Tap Transformer ====
  
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 Many small print transformers will give more than their rated voltage when little current is drawn. So in many cases 12 V transformers can also be used. Build the whole circuit and measure at the input of the 7812. You should have little more than 15 V at this point. In fact the 7812 is rated for an input voltage of 14.5 V-35 V. Again, don´t forget that our mains supply can vary between +5% and -10%! Many small print transformers will give more than their rated voltage when little current is drawn. So in many cases 12 V transformers can also be used. Build the whole circuit and measure at the input of the 7812. You should have little more than 15 V at this point. In fact the 7812 is rated for an input voltage of 14.5 V-35 V. Again, don´t forget that our mains supply can vary between +5% and -10%!
  
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 +Click to view the full-size .pdf file.
  
 ==== With a Single Transformer ==== ==== With a Single Transformer ====
bipolar_12v_psu.txt · Last modified: 2010/02/28 16:46 by nils