USB chargers

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  • capwizard
    Badcaps Legend
    • Jun 2016
    • 1991
    • USA
    #1

    USB chargers

    Hola todos, USB chargers start to fill up your drawer, How can we use it?

    A dozen USB chargers in the lab: Apple is very good, but not quite the best
    http://www.righto.com/2012/10/a-doze...-apple-is.html

    Apple iPhone charger teardown: quality in a tiny expensive package
    http://www.righto.com/2012/05/apple-...n-quality.html

    Cheapest SMPS Circuit Using MJE13005
    http://www.homemade-circuits.com/201...-mje13005.html

    I try to use as a Poorman's LED tester power supply from 5v boot up to 300v is that possible?

    Dios esta contigo
    Attached Files
    Last edited by capwizard; 03-18-2017, 04:48 PM.
    Tags: None
    • capwizard
      Badcaps Legend
      • Jun 2016
      • 1991
      • USA
      #2
      Re: USB chargers

      I swapped input to output transformer and change resisters above pic2. By input 3vDC best I got is 27vDC ?

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