MOTM

Remember, it's a *resistance*, not a pot with a wiper! In some cases, you
can do it
but in most you can't.

Paul S.

----- Original Message -----
From: Nathan Hunsicker <nate@...>
To: <motm@egroups.com>
Sent: Friday, April 28, 2000 8:59 AM
Subject: Re: [motm] 410 HELP!!!


> If I understand this correctly, the vactrol is a variable resistor who's
> value is set by the brightness of an internal led. Wouldn't this be a
> somewhat easy solution to those of us looking to add cv control over an
> existing pot? Of course, I don't even know if these pieces are still in
> production, readily available, or what the specs are. (value, tollerance,
> current) -Nate
>
>
> >I would replace it. It's off-the shelf, nothing special.
> >
> >
> >
> >The vactrol is a combination LED and photocell. It's a variable resistor!
> >
> >
> >
> >Paul S.
> >
> >
> >
> >----- Original Message -----
> >
> >From: Nathan Hunsicker <nate@...>
> >
> >To: <motm@egroups.com>
> >
> >Sent: Friday, April 28, 2000 7:52 AM
> >
> >Subject: Re: [motm] 410 HELP!!!
> >
> >
> >
> >
> >
> >> Also, could I have done any damage to the op amp by running it
backwards?
> >
> >> (it was only for 2 or so minutes) If I damaged it, is it any different
> >
> >> thana standard off-the-shelf TL074? And just a curiosity question, what
> >
> >are
> >
> >> the vactrol units actally designed to do? some sort of LED
driver? -Nate
> >
> >>
> >
> >>
> >
> >> >
> >
> >> >You're absolutely right!!! Why do they have to confuse me by putting a
> >
> >dot
> >
> >> >
> >
> >> >and a notch on the case? I must have checked it 10 times before
noticing.
> >
> >> >
> >
> >> >-Nate
> >
> >> >
> >
> >> >
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>IT'S IN BACKWARDS!!!!
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>Paul S.
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>----- Original Message -----
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>From: Nathan Alan Hunsicker <nate@...>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>To: MOTM Newsgroup <motm@egroups.com>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>Sent: Thursday, April 27, 2000 10:57 PM
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>Subject: [motm] 410 HELP!!!
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> I just finished the 410 tonight, the filters work fine as do the
depth
> >
> >&
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> sweep controls however, I cannot get the internal LFOs to work. My
> >
> >rate
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> knob does nothing and upon further investigation I found that the
> >
> >TL074
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> op amp is getting VERY hot. Any ideas? I double checked all my
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> connections and solder joints, everything is in the right place and
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> facing the right way. I cannot figure it out, any help would be
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> appreciated. Thanks -Nate
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>>
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >>
> >
>
>>>> -----------------------------------------------------------------------
-
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>> Was the salesman clueless? Productopia has the answers.
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >> >>>
> >
> >> >
> >
> >>
> >
>
>>>><<<http://click.egroups.com/1/3019/3/_/529958/_/956894148/>http://click.
egro
>
>>>>ups.com/1/3019/3/_/529958/_/956894148/><http://click.eg>http://click.eg
> >
> >roup
> >
> >>
> >
>
>>>>s.com/1/3019/3/_/529958/_/956894148/><<http://click.egroups.co>http://cl
ick.
> >>>>egroups.co><http://clic>http://clic
> >
> >k.egrou
> >
> >> >>>ps.co
> >
> >> >
> >
> >> >>>m/1/3019/3/_/529958/_/956894148/
> >
> >> >
> >
> >> >>
> >
> >> >
> >
> >>
> >
>
>>>> -----------------------------------------------------------------------
-
> >
> >> >
> >
> >> >>
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> >> >>>
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> >> >>>
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> >>
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> >>
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> >>
> >
>
>> ------------------------------------------------------------------------
> >
> >> Earn free CDs from Amazon & CDNow? True!  New site needs
> >
> >> music fans of Rock, Soul, HipHop, Jazz, Country & Dance.
> >
> >> Get paid to listen to music you love.  JABOOM.com
> >
> >>
>
>><http://click.egroups.com/1/3760/3/_/529958/_/956926630/>http://click.egro
ups.co
> >>m/1/3760/3/_/529958/_/956926630/
> >
>
>> ------------------------------------------------------------------------
> >
> >>
> >
> >>
> >
> >
> >
> >
> >
> >
>
>
>
>
> ------------------------------------------------------------------------
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> ------------------------------------------------------------------------
>
>