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DC-DC Converter

Joe Wu

Feb 9, 2017
11
Joined
Feb 9, 2017
Messages
11
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!
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
Joined
Jan 21, 2010
Messages
25,510
Perhaps you can upload those attachments again. It looks like you deleted them -- don't do that :)
 

Audioguru

Sep 24, 2016
3,656
Joined
Sep 24, 2016
Messages
3,656
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.
 

Joe Wu

Feb 9, 2017
11
Joined
Feb 9, 2017
Messages
11
it is because of the breadboard. Problem solved! thank you!
 
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