The simplistic Salas low voltage shunt regulator - Page 585 - diyAudio
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Old 13th April 2013, 01:34 PM   #5841
kumori is offline kumori  Europe
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Thank you Andrew, hour advice helped me to tackle down the problem.

The CCS didnīt work.

It was the weirdest mistake actually: A small metal fibre (I guess from a desoldering litz) was trapped under one of the CCS-LEDs and shorting something.
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Old 13th April 2013, 02:23 PM   #5842
AndrewT is online now AndrewT  Scotland
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A Salas style Shunt regulator is two bits of circuit/
A CCS and a voltage controlled current load.
The combination results in a controlled output voltage.

You can build and use the two parts separately. It just that here they are integrated into the same PCB.
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Old 13th April 2013, 07:05 PM   #5843
pchw is offline pchw  United States
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Hi Salas,

Just got my second wire-2-wire Bib up and running, this one is to power the digital 5V section of the new Shigaclone. It works great. Picture attached.
Is there a version of the reflector for 5V somewhere in this long thread? I searched but failed to find one. Do you mind to point me to the right direction?

I am curious to compare the Bib and the Reflector.

Thanks!!
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Old 13th April 2013, 08:49 PM   #5844
Salas is offline Salas  Greece
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Looking good Fred, congratulations! For Reflektor very low voltage make a search for member's Kazuo Ozawa posts. He had shown practical builds and values for 5V and below. He had tested Logic Level Mosfets results that allow it working such low as I had suggested. Interesting comments about semis types and Zobel termination values there too.
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Old 13th April 2013, 09:18 PM   #5845
pchw is offline pchw  United States
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Thanks, Salas, found the schema.
Will have to hunt for some parts before I can start.
What kind of wattage needed to the 560R resistors?
I suppose the current passing through the mirrors won't be that big. Is it a right assumption?

Thanks again!!
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Old 13th April 2013, 09:20 PM   #5846
Salas is offline Salas  Greece
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~4mA
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Old 14th April 2013, 05:05 PM   #5847
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salas what other fet from here JFET | Junction Gate FET | Farnell Italia | Results can I use in place of k170/k117/bf245 for the
reflektor(3.3V and 5V)

I want to start prototyping the board...
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Old 14th April 2013, 06:22 PM   #5848
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dac board looks like this...
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Old 14th April 2013, 07:15 PM   #5849
Salas is offline Salas  Greece
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J113 but regulate its idss to 1-2mA with its source resistor.
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Old 14th April 2013, 08:39 PM   #5850
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that would be a 500R - 1k resistor?


edit : nope... was looking at the wrong table

Last edited by schultzsch; 14th April 2013 at 08:45 PM.
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