LEDs VU meter with no external power

have no idea.. i wish i knew more!! I also found another one, which is crazily expensive toh:

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See the schematic on bottom of page 9?

Like that. :)

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--Winston

Reply to
Winston
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I would like to see this done on an audio stream.

Every time the audio gets to silent or cuts out, the VU display would go off.

Not very friendly.

don

Reply to
hamilton

Il 05/01/2012 11:29, Giulio ha scritto:

ciao Giulio

it's really ugly, but should work increase/decrease the resistor values as suitable

1n4148 o---10R---->|---+----+----390R----+ | | LED o | +----820R----+ | 10uF === | LED | 63V --- +----1K2R----+ | | | LED | | +----1K5R----+ | | | LED | | +----2K2R----+ | | LED | | | +---------------+-----------------+
--
bye
!(!1|1)
Reply to
not1xor1

t

some

hip

Although we were using digital display, the idea is applicable to VU graphics display as well. I have seen LCD VU meter panels.

Reply to
linnix

no don't do this - the led is not protected from reverse voltage which it will experience and if you hook up a few diodes like this they will all turn on at once.

--
We have failed to address the fundamental truth that endless growth is 
impossible in a finite world.
Reply to
David Eather

That's what it is supposed to do. VU should be off when there is no signal.

Ed

Reply to
ehsjr

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