transformerless power supply

Discussion in 'General Electronics Chat' started by jene412, Aug 10, 2011.

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  1. jene412

    Thread Starter New Member

    Aug 10, 2011
    ..please, can anybody educate me about the pros and cons of making a transformerless 12v out power supply? would be of great help if you do so,..
    ..this supply is connected to 220VAC on mains.. what ampere rating do streetlights work??..thanks a lot..
    Last edited: Aug 10, 2011
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    Transformerless power supplies are not allowed to be discussed on this forum, sorry.

    There are a few options, just google it.;)

    In general a transformerless power supply will be less safe because either it's isolated with a capacitor (not as safe as a transformer) or it's not isolated at all.
  3. SgtWookie


    Jul 17, 2007
    Transformerless supplies cannot be made safe, which is why they are not allowed to be discussed on these forums.

    A transformer provides isolation from mains power, and is a bargain compared to the cost of a funeral.
  4. tom66

    Senior Member

    May 9, 2009
    A transformerless supply can only be safe if both of the following requirements are met:
    - The device has NO external output or input which is non isolated (e.g. audio input/output)
    - The device is fully sealed from entry. (Screws are okay, but sufficient warnings are recommended.)

    Regardless, due to the fact that these are dangerous they cannot be discussed.

    HOWEVER, an isolation transformer can be picked up cheap, and can be used to test a transformerless power supply. But then it wouldn't be transformerless.
    Last edited: Aug 10, 2011
  5. bertus


    Apr 5, 2008

    I am closing this thread as it violates AAC policy and/or safety issues.

    6. Restricted topics. The following topics are regularly raised however are considered “off-topic” at all times and will results in Your thread being closed without question:

    • Any kind of over-unity devices and systems
    • Automotive modifications
    • Devices designed to electrocute or shock another person
    • LEDs to mains
    • Phone jammers
    • Rail guns and high-energy projectile devices
    • Transformer-less power supplies
    This comes from our Tos:
    Terms of Service

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