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Variable power supply unit

Discussion in 'Power Electronics' started by Simon Baker, Nov 28, 2016.

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  1. Simon Baker

    Simon Baker

    2
    1
    Nov 28, 2016
    Hi am tring to make a pyrography pen, and I've been looking online for how to power it, there's loads of different ideas, the main ideas are running it from a computer psu but converting it to a variable psu, but there's a few ways on how so I've read about,

    1 is to use a PWM DC motor speed controller

    2 is to use a Voltage Regulator Voltmeter Buck Converter LM2596 DC 5/12V

    3 is to change the 2.7k resistor in psu for a potentiometer.

    I was just wondering which would be the safest and easiest way to convert it.
     
  2. davenn

    davenn Moderator

    13,721
    1,912
    Sep 5, 2009
    hi Simon
    welcome to the forums :)

    what current @12V does this thingie of yours need ?

    probably not

    probably the best .... or depending on current, a LM317 or a LM338

    who knows what resistor you are referring to ??
     
  3. Simon Baker

    Simon Baker

    2
    1
    Nov 28, 2016
    Thank you for help, I am tring to get around 5v-9v. it's for burning designs into wood.
     
    davenn likes this.
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