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
LEDs VU meter with no external power
Jan 04, 2012
25 Replies
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
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)
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.
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.
That's what it is supposed to do. VU should be off when there is no signal.
Ed
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