Signal Presence Detectors?

[Goddard, Duncan]

> >>>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?
> 
> d.
> 


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