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Reply to "LED Circuit Design and Modern Transformers"

My intent was to show that with a reasonable component selection, the ripple and hence the A.C. current through the cap should not cause heating.  One problem is we don't know  what the actual load on the power supply is.  If the current is in fact 5 amps then the 2 amp bridge he is using will not survive.  The bridge I used was a 5 amp and I wouldn't think of drawing 5 amps through it without a heat sink.  I looked on Amazon and found a 16 foot Led strip where the recommendation was for a 12 volt 2 amp supply.  It would help to know what is being powered up.  All of the modern transformers are using some type of Thyristor voltage control.  Depending on the setting and particularly at the lower voltage setting, when only a small part of the sine wave is being applied to the circuit, the waveshape looks similar to a spike.  The high frequency content will cause a high amount of current in the filter.  I will push the load up  and publish the details later. 

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