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Old 7th December 2006, 10:03 AM   #1
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Cool Pictures and circuits of my DIY class D and other projects.

Hi All!
You can look at my DIY projects on my website http://www.classd.fromru.com

2 UcD amps (pics, circuits+pcb) :

http://www.classd.fromru.com/circuits.html



PS. sorry for my bad english
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Old 7th December 2006, 10:13 AM   #2
RX5 is offline RX5  Philippines
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Thumbs up cool

I wish it WAS in english.... or is my browser bad?



and add to that , SMTs... man!! I congratulate you....
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RoCk On!!! I love my diy UcD!!
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Old 7th December 2006, 11:09 AM   #3
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yes, all articles in Russian. But i think the main thing - circuits and pcb
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Old 7th December 2006, 11:13 AM   #4
TroelsM is offline TroelsM  Denmark
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Hi.

Thank you for the nice pictures. Inspiring!

Some word about the construction-details would surely be good to have.

Your SMPS seems to be unregulated and with a toroid-transformer. Whats the regulation on the secondary-side and how do you maintain proper isolation between primary and secondary windings?

Regards TroelsM
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Old 7th December 2006, 11:41 AM   #5
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Default smps

TroelsM,
i dont like stabilized SMPS. This SMPS without feedback.
I calculated turns in the special soft for transformer.
Primary winding isolated with insulating tape.
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Old 7th December 2006, 11:58 AM   #6
TroelsM is offline TroelsM  Denmark
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Hi.

How much does the secondary-voltage go down when the supply is heavy loaded?

I would guess that its drops quite a lot as there's no regulation and probably a pretty poor coupling between prim and secondary-windings.

Maybe that doesn't matter much with classD?

Your page would be top-notch if you added a bit of English text and some measurements of SMPS and classD.

Regards TroelsM
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Old 7th December 2006, 01:17 PM   #7
edl is offline edl  Hungary
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Great site, thanks!

Keep on work!
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Old 7th December 2006, 01:18 PM   #8
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Smile smps

TroelsM,
This smps was developed for tda8924 some months ago.
Without loading a voltage output about +- 25-26v on the maximal loudness nearby +--22-24.

You can read articles with some on-line translator.

Measurements I shall do later, after assembly of the new version pcb of UcD.
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Old 7th December 2006, 06:16 PM   #9
Baldin is offline Baldin  Denmark
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classd_fromru
Super Cool. Great work.
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Old 7th December 2006, 06:48 PM   #10
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Baldin, thanks! i tried
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