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Old 29th September 2011, 09:20 PM   #421
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7.84 LEDs string - 5.1V for 0.5A 9610 = 2.74V : 5R1 = 0.537A
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Old 29th September 2011, 09:21 PM   #422
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Originally Posted by merlin el mago View Post
For digital clock reg. till 1000uF
Gracias Felipe!
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Old 29th September 2011, 09:25 PM   #423
Salas is offline Salas  Greece
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Originally Posted by merlin el mago View Post
7.84 LEDs string - 5.1V for 0.5A 9610 = 2.74V : 5R1 = 0.537A
Don't expect spot on for each sample, the manufacturer's datasheet ID/VGS curve is general, but its always near enough in the right area.
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Old 29th September 2011, 09:46 PM   #424
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For sure but it's a guide to have an aprox. idea wich be the value for current adjust, for example in your BIBguide Rev2 3R9 5W for 0,5A
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Old 29th September 2011, 09:53 PM   #425
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Here is the relevant guide excerpt.
Attached Images
File Type: gif GuideExcerpt.gif (70.2 KB, 336 views)
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Old 30th September 2011, 07:52 AM   #426
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I'm trying to implement the things I've learned from the BiB in an amp I'm building. There is a 4V7 zener with a filter cap. So better to change it to a smaller zener ( to get same voltage drop as before) + a resistor ~220 Ohm to enhance filtering ? To get a RC filter ?
Sorry for being off-topic here, Erik.
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Old 30th September 2011, 11:34 AM   #427
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Greetings,

Let it be kbown that I am not a seasoned expert in DIY audio.
So here is my BIB project:

got 18V + reg for an I/V section of a dac.
got 5.45V + reg for the digital section of a td1545a dac chip.

the bibs are powered by separate tfos.
the dac board shares the same ground plane.

I've tested both segments individually.

My question is:

Can I connect the 2 bibs on the board? IE: share same ground plane but powered from different tfos? If not, what is required to share the same ground from 2 different bibs?

regards.
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Old 30th September 2011, 01:16 PM   #428
Salas is offline Salas  Greece
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Quote:
Originally Posted by acidbrain View Post
I'm trying to implement the things I've learned from the BiB in an amp I'm building. There is a 4V7 zener with a filter cap. So better to change it to a smaller zener ( to get same voltage drop as before) + a resistor ~220 Ohm to enhance filtering ? To get a RC filter ?
Sorry for being off-topic here, Erik.
Use two green leds and a diode instead, says the radical solution.
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Old 30th September 2011, 01:19 PM   #429
Salas is offline Salas  Greece
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Quote:
Originally Posted by necplusultra View Post
Greetings,

Let it be kbown that I am not a seasoned expert in DIY audio.
So here is my BIB project:

got 18V + reg for an I/V section of a dac.
got 5.45V + reg for the digital section of a td1545a dac chip.

the bibs are powered by separate tfos.
the dac board shares the same ground plane.

I've tested both segments individually.

My question is:

Can I connect the 2 bibs on the board? IE: share same ground plane but powered from different tfos? If not, what is required to share the same ground from 2 different bibs?

regards.
That has only to do with how the dac is configured. If it has same ground plane, you have no other choice it seems.
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Old 30th September 2011, 01:30 PM   #430
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Quote:
Originally Posted by Salas View Post
Use two green leds and a diode instead, says the radical solution.
the colourful solution nice !
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