Signal Presence Detectors?

[Hairy Harry]

The LED clipping AFAIK is pretty much tha same as diodes of
all ILK  (y'know what an ilk is dont'cha? Its a small moose)
The onlt difference is that it gets you into the 2V clipping
range.

I would NOT put those LED through the front panel... they can be
used as photodetectors and I fear the same kind of trouble as
exposing other junctions to varying illumination.

Yes bipolar LED are just back to back LED and are probably two
chips with no attempt at matching.

H^) harry


>From: "danial stocks" <diode at hotmail.com>
>To: synth-diy at node12b53.a2000.nl
>Subject: RE: Signal Presence Detectors?
>Date: Mon, 04 Dec 2000 14:29:06
>
>
>>
>> > >>>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
>_____________________________________________________________________________________
>Get more from the Web.  FREE MSN Explorer download : 
>http://explorer.msn.com
>

_____________________________________________________________________________________
Get more from the Web.  FREE MSN Explorer download : http://explorer.msn.com