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DC-DC Converter

Discussion in 'General Electronics Discussion' started by Joe Wu, Feb 18, 2017.

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  1. Joe Wu

    Joe Wu

    Feb 9, 2017
    Hi, I have recently built a dc-dc converter to convert supply voltage from 6V to 32V, the circuit diagram is as below:
    View attachment 120773

    and the circuit on the breadboard is looks like this:
    View attachment 120774

    My friend has built one with the same circuit diagram, I have double checked with him, both circuit connects exactly the same with same components, he circuit is working perfectly fine, but my circuit has a problem. my output voltage jump to the 42V, slowly drops to 32V, jump up again to 42V, slowly drops and it repeats this process over and over again. I have no idea what is wrong with it.

    Here is how my friend circuit looks like:
    View attachment 120775

    Any help will be appreciate!

    Thank you!
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Perhaps you can upload those attachments again. It looks like you deleted them -- don't do that :)
  3. Audioguru


    Sep 24, 2016
    On another website Joe Wu was trying to attach his images to links at the All-About-Circuits website but they also did not work.
  4. Joe Wu

    Joe Wu

    Feb 9, 2017
    it is because of the breadboard. Problem solved! thank you!
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