Building the buck converter circuit on Wikipedia.
https://en.wikipedia.org/wiki/Buck_converter
Arduino PWM Experiments - Muppet 2 Project
https://youtu.be/8RpVaUXgD0U
Arduino PWM Inversion Issue - Muppet 2 Project
https://youtu.be/fEz-NDCDhT4
DCOI Revisited (part 1) - Muppet 2 Project
https://youtu.be/Q4B8uiOAI9o
DCOI Revisited (part 2) - Muppet 2 Project
https://youtu.be/sLVcEJYxpLg
DCOI Revisited (part 3) - Muppet 2 Project
https://youtu.be/Su6ldNb4P50

By Julian

Youtuber, shed dweller, solar charge controller aficionado

15 thoughts on “Let’s build a buck converter”
  1. Avataaar/Circle Created with python_avatars Ikeh Samuel Ifeanyi says:

    I am confused please. How are you driving the MOSFET through the gate and source. I thought it is only the gate that should receive the pwm signal.

  2. Avataaar/Circle Created with python_avatars Andre De Jager says:

    "A monument to my mechanical ineptitude" 🙂

  3. Avataaar/Circle Created with python_avatars TheBinarydeity says:

    dude seriously get another piece of wood

  4. Avataaar/Circle Created with python_avatars Erik Bongers says:

    Thanks to this video, half of the beginner electronics hobbyists think a buck-converter involves a piece of wood, a drill, an arduino nano, …

  5. Avataaar/Circle Created with python_avatars Michael D says:

    Wow. I am amazed this appeared to work the first time!!!! Great job as always Mr Llett!!

  6. Avataaar/Circle Created with python_avatars Robert Thompson says:

    Very sly the way you substituted that mechanical switch with a mosfet at the last minute! Great video.

  7. Avataaar/Circle Created with python_avatars PinoyTechTutorials says:

    the way you explain it is amazing! btw what happen to the switch you shown earlier?

  8. Avataaar/Circle Created with python_avatars Kirill Stolyarov says:

    No evidence here about buck converting. You feed 12V lamp from 12V source.

  9. Avataaar/Circle Created with python_avatars ziad fawzi says:

    Thank you

  10. Avataaar/Circle Created with python_avatars Chris Roberts says:

    You need some sharper drill bits haha!

  11. Avataaar/Circle Created with python_avatars James Holbrook says:

    You should have just used a punch and knocked out that one

  12. Avataaar/Circle Created with python_avatars James Holbrook says:

    So what are the limits like of you wanted something big like 20+ amps obviously wire gauge and a mosfet that is big enough and heat sink but would you need a real big inductor

  13. Avataaar/Circle Created with python_avatars Nothing\ says:

    Butt converter.

  14. Avataaar/Circle Created with python_avatars ziplock9000 says:

    That PWM circuit is massive overkill. Use a 555 instead

  15. Avataaar/Circle Created with python_avatars cypherf0x says:

    Always tin your iron tip with solder to prevent oxidation. Oxidation impedes thermal transfer from the tip to the joint. Wedge tips are better for general use because there's more surface contact with the joint. More surface contact means more thermal transfer.

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