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zjaakco
11-09-2011, 10:23 PM
Hi, all there.
I search for a 25 Khz sinus oscillator, as good - stable as possible.
I have googled, a lot reactions but noting useable.
This forum was one of the hits, so I rigister.
And yes, I will use it in a smps.
Is there anyone who can help me?
Thanks.
Zjaakco

MicrosiM
11-09-2011, 10:47 PM
that looks it will be used to sync an SG3525 for example?

zjaakco
11-10-2011, 03:14 PM
Hi microsim.
Can you help me for a schematic for an oscillator?
zjaakco

MicrosiM
11-10-2011, 05:28 PM
Hi microsim.
Can you help me for a schematic for an oscillator?
zjaakco

is it for SG3525?

tebci
11-24-2011, 01:44 PM
Hi, all there.
I search for a 25 Khz sinus oscillator, as good - stable as possible.
I have googled, a lot reactions but noting useable.
This forum was one of the hits, so I rigister.
And yes, I will use it in a smps.
Is there anyone who can help me?
Thanks.
Zjaakco

Zjaakco

diyaudio closed your thread, dont worry, this happens every day.

Thats the job of sick moderators like (SY), they act like they know every thing, we all recognize how danger the power line is.

Keep the good work here, at least you have freedom :D

zjaakco
11-27-2011, 12:06 AM
Hi tebci
thanks for your reaction. I was surprised, I thought, I give a clear warning because high voltage, as we know, thats dangerous. There were a few lats in panic, they don't read the post good enough.
Al what I posted there was only for discussion, with the purpose to get a diy high frequency power
supply. I believe they are scary.
regards
zjaakco

zjaakco
11-28-2011, 02:56 PM
Hi all
I will post a pdf file, but I can't upload the file of my computer, a message appear that a plugin is chrasht, still an update go wrong. Its the adobe flash plug-in.
Is there anyone who can help me?
regards
zjaakco

MicrosiM
11-28-2011, 03:46 PM
I advice you to use Google Chrome

zjaakco
11-28-2011, 04:03 PM
Hi MicrosiM

thanks for your advice. If any thing going right, then a attachment of a pdf file will be visible.
regards
zjaakco

MicrosiM
12-05-2011, 08:32 AM
Hi MicrosiM

thanks for your advice. If any thing going right, then a attachment of a pdf file will be visible.
regards
zjaakco

Hi Zjaaco


I assume that you need a self oscillating SMPS unit?

However, I have included two things for you in the attachments, one of them is what you are looking for.

Let me know, so I can help you better.

Micro

zjaakco
12-10-2011, 02:31 PM
Hi all
I have a lot of time spend on searching of witch ferite one need for a mains filter, and stepup/power transformer, but nothing found for using.
If we take the blok diagram, from the oscillator to the input of the power transistor for amplification. my thought ,
is there a stepup transformer useble? Then from the sec of the output trafo a line(feet) back to the oscilator, to create a regulator. Keep in mind that i will use such a power supply by 15 Vac/ and max. 500mA.
My firsth general question, is this theoretical possible, and if yes do you think is it possible to create a working
power supply ? With a frequency of 25- 35Khz.
My second question, Is there anyone who can tell me which kind of ferite i need for the mains filter, and which for
a power transformer by 25-35Khz. Thanks a lot.
Regards,
Zjaakco

zjaakco
12-10-2011, 02:35 PM
there go something wrong here

zjaakco
12-11-2011, 12:21 AM
Hi MicrosiM
The oscillator your attached is indeed a possibility. I had in mind a device with a crystal. There are 32 Khz crystals
availeble So we com some closer to our goal.
Regards
zjaakco

zjaakco
01-04-2012, 03:40 PM
Hi all

Will this diagram be a possibility to get a working power supply?
Regards
Zjaakco

zjaakco
11-29-2013, 12:48 PM
To construct a sinus oscillator, A Bubba oscillator is a good possibility.
I have make a 50Khz, easy to bult not much components, and stable.
Google bubba oscillator for samples,
Regards

MicrosiM
05-04-2014, 08:00 PM
Any updates?