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Old 6th February 2010, 05:42 PM   #911
Salas is offline Salas  Greece
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Quote:
Originally Posted by umut1001 View Post
hi.As a power supply capacitor people suggest 4700uf caps.Is 3300uf 50v elna silmic 2enough for it ? Does sound quality decrease ?thanks
Enough still.
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Old 9th February 2010, 11:11 PM   #912
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Quote:
Originally Posted by Salas View Post
That was a remedy for those without a Darlington like BC517, when some prototypes showed some erratic NPN relay driver and relay coil ''chatter'' mishaps. A 0.1uF to 0.15uF cap across B,C of the NPN under the coil could shut down the coil buzzing, soldered underneath and directly to the NPN's pads, hidden from view. No further report of chatter was mentioned after specifying BC517 relay driver. If you just happen to have a BC550 for that or other, the 0.22uF cap will still save the day if you chance on an upsetting relay coil. The 7812 is the 3 terminal 12V reg for the delay and relays.
As you say, this tiny cap will stop the chatter mishaps by putting it across B,C of the NPN.
What is the 7812 cap for, then?

Another last question, should I have to make all the jumpers printed on the silkscreen? I intend to make a full hypnotize board (not only the shunt regulator part). I supose I have to.

Thanks for all!
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Old 9th February 2010, 11:22 PM   #913
Salas is offline Salas  Greece
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The 100n cap to the right and parallel of the 7812 is its input decoupler.
Yes you will have to jumper all. And there is a ''NOTE'' for a jumper or two resistors choice depending on having 12V or 5V relay.
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Old 9th February 2010, 11:30 PM   #914
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Thanks, I supposed that it maybe had anything to do with the chatter thing.

Were you waiting me with your hands over the keyboard? You replied so fast
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Old 9th February 2010, 11:38 PM   #915
Salas is offline Salas  Greece
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Was just around.
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Old 10th February 2010, 07:19 PM   #916
le´flu is offline le´flu  Germany
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Hi everybody,
as i´m new to this thread i´m a bit confused
about finding information.....so many sites.
Just three questions and hoping to get answers:

1: how do i best and to what data do i have to match the
b1 sk170 jfets?
2: how to match the LED´s in salas reg?
3: whats input- and outputimpedence of B1? Is there some
range to fit inputimp.?

Greetings Ulf
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Old 10th February 2010, 10:57 PM   #917
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You will find all that info and more here in the attachment
Attached Files
File Type: pdf SalasDCB1shuntreg build guide v4.1.pdf (50.7 KB, 352 views)
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Old 11th February 2010, 01:04 AM   #918
tinitus is offline tinitus  Europe
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I also have a build guide v4.4(2)....dont know the difference
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File Type: pdf SalasDCB1shuntreg build guide v4.1(2).pdf (50.7 KB, 182 views)
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Old 11th February 2010, 04:36 AM   #919
le´flu is offline le´flu  Germany
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Hi
thanks a lot....thats what i need.

Greetings
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Old 17th February 2010, 07:30 PM   #920
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Hey, Lansing enclosures has a nice "P" style GrayBox.

P2Q06/08/10
3.47" H x 4.18"W x (6" / 8" 10") $48.10 -$57.91


I would imagine I could fit hypnotize in one of these cases.

What have people been stuffing they're dcb1 buffers into?
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