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MOTM

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Message

Re: [motm] 820 bypass modification??

2001-04-07 by J. Larry Hendry

> ----- Original Message ----- 
> From: <mark@...>
> I could put a diode right on the CV input, leaving me
> with approximately 4.4V.
----
I'm not following you at all here.
----
> I think have the application notes for all of the motm
> IC's would make the experience more educational. 
> Do you know who makes it??  I shall attempt a
> web search.
----
Well, I actually think the documentation with MOTM is
more educational than any of the rest out there.  
----
> Pending research, how is this idea??  Add another 
> transistor with 15V at the collector, have the input
> from the jack go through a diode (to protect against
> negative voltages), through a current limiting resistor
> at the base, then connect the emmiter to the switch
-----
Yadda, yadda, yadda....
I was suggesting something without addisional of parts.  Actually
the easiest thing, would be to leave the 820 just as is. Go get
one of those very small and cheap 5 volt relays that looks
like a IC.  Run your CC voltage to that, and use a normally
closed contact out of the thing to switch your 820. $2 max, no
power supply wiring required and no 820 mod.  Mount it to the
back of the 820 bypass jack.

Larry H

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