Karen's PIC Humnuller
- My friend, Karen has published her amazing hum remover that is
implemented on a cheap PIC processor! It does a credible job for casual
listening and I now have a 24/7 receiver operating without a PC
required (and my hum environment is terrible). There is a little buzz
left over and a bit of fundamental which could be easily notched but it
is really fine, as-is.
Here's the link: http://www.techlib.com/Karen/micro.htm#Humnuller
I use an ordinary four-resistor differential amplifier to subtract the
PIC's hum estimate from the signal. I figured that would give me some
control over the balance but I ended up with equal value resistors.
I'll post more applications soon.
Firefox can't see the images right now but I'll fix that in the next
few minutes, I hope.
- I thought I remembered that but I didn't spot it with a quick look. I'm
looking at Unreal Media Server as an upgrade for the live web VLF (and
possibly camera). Anyone have an opinion? The current little server box
has poor audio quality so I thought I might switch to the soundcard in
--- In VLF_Group@yahoogroups.com, "MarkD" <mdennisond@...> wrote:
> Hi Charles, i read on Karen's website that she clocks them to 20mhz,
i clock the picaxe to 16mhz & never had problems so i think i'll do
> I've managed to source the ad5320 from rs electronics, i will be soon
ordering the parts.
> [Non-text portions of this message have been removed]