[sdiy] Op-amp to boost VC signal with +5V/GND?

[Jason Proctor]

>  > Serge runs it through a 3.3k resistor with a zener to ground after it.
>>  However, I agree that you probably don't really want a smaller gate.
>
>This arrangement pulls a lot of current (3.6mA).  You can't have too many of
>these in your system if you want to power a lot of modules with a single
>power supply.
>
>My modular uses 5V gates throughout.  Gated modules are typically activated
>at about 2V.  5V gates are also convenient for interfacing with digital
>circuits.  Hence, why would one want or need 12V gates?

for the unmodified ARP Odysseys etc of the world? :-)

i heard from Ken Stone that initially he designed his modules to spit 
out 15v (or 14.4, i think) in order to trigger the shit out of 
anything. however, after some gear couldn't deal with that much 
juice, he settled on 15v/1k/2k2 dividers to give 10.3, which works 
with most everything.

i replied privately to the OP but in this case i would recommend a 
Ken-style transistor buffer with following divider.