Signal Presence Detectors?

[danial stocks]

>
> > >>>Have you seen bipolar (red-red) LEDs... I LOVE them... i even drive
> > them off
> > the
> > AC mains (with a high value series resistor)... The forward biased LED
> > protects its
> > brother from reverse bias, they are "full wave" and light on either
> > polarity.
> > Check them out.  I'm also using them as clipper stages for fuzz
> > circuits...<<<
> >
> > this is how the original marshall "guv'nor" fuzzbox does it; they
> > substituted two led's for the germaniums of the old mxr design and added
> > tone controls. bipolar led's are just two regular led's back-to-back,
> > right? is there any other protection besides the presence of the other
> > led?

Yeh, A later version of the proco rat pedal does the same, leds as 
clipping.. really should put them on the front, they pulsate with the 
music.. do they offer a new sort of clipping curve other than higher 
breakover vtg, or just people being smart a**?
Cheers,
Dan
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