[sdiy] Analog VU Meter/Simple Attenuator Module

[Tim Parkhurst]

On 10/23/07, thomas white <djthomaswhite at yahoo.com> wrote:
> Hi all,
>
snippage
>
> PS. I also was looking at digital meters available for
> around 20-30$ US on eBay for a build out... but, most
> only take 2-3 measurements per second which would be
> totally cumbersome trying to measure a voltage sweep
> or similar. Does anyone know of a good panel meter
> with a fast sampling rate of around 20 or 30 times per
> second?
>
> Thomas White

How about using a pair of LM3914s to construct a bar/dot LED panel
meter? The 3914 is an analog chip, and twenty LEDs should be more than
adequate to indicate trends and even fairly accurate voltage readings.
Also, this will respond to transients better than a mechanical meter
can. Oh, and they're pretty cheap. Or how about one 3914 driving a set
of ten LEDs to indicate fast transients and trends, and a mechanical
meter for more accurate steady-state readings?


Tim (not cheap, but responds well to transients) Servo
-- 
"Imagination is more important than knowledge." - Albert Einstein