AC (from main) to DC

Discussion in 'The Projects Forum' started by wadevva, Sep 9, 2014.

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  1. wadevva

    Thread Starter New Member

    Sep 9, 2014
    Hello all,

    I am new in this forum so pardon me for any mistake type in this project forum.

    I am currently doing this project in powering a string of LEDs which have the output 24Vdc and approx 700mA. As I will be using an AC main power supply, I know that I will need to rectify it to DC before I can do anything. Furthermore, I will also need to power a micro-controller straight after the rectification. So the process is as follow:

    AC main ------> Rectifier diode bridge (325Vdc) -------> Power up a 5V micro-controller as well as going to a POWER MOSFET (from calculation the duty cycle will have to be only 6% ) -------> BUCK converter ------->24Vdc to power the LED.

    Can I know if this process is correct? Or will I have to use the mosfet to generate a high frequency voltage and use a high frequency transformer to step down the voltage? ( After PWM from MOSFET the voltage will be AC right?)

  2. 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

  3. Wendy


    Mar 24, 2008
    Saving the cost of a wall wart is not worth endangering your or other peoples lives.
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