Yahoo Groups archive

Cgs synth

Index last updated: 2026-04-28 23:16 UTC

Message

Re: DUSG, regarding diode that goes from trig in to end out

2011-12-30 by sasami@hotkey.net.au

If the PCB agrees with the other diagram, that means my diagram is incorrect.
As simple as that.
Ken
>I'm currently designing a PCB based on CGS114 to suit my own needs. In
>doing so, I've been studying both the schematic and PCB layout and
>I've noticed a small difference between the two. In the schematic,
>there's a diode that goes from the 33k resistor near trig in, directly
>to end out. In the PCB layout, this diode is instead connected to the
>output of the 3900, on the other side of the resistor/zener network.
>
>Another DUSG schematic I have also connects it as in the PCB layout,
>so I'm assuming this is the original way. Is there any particular
>point in connecting the diode as in the schematic? (I.e. directly to
>the M terminal.)
>
>I'm trying to understand whether the purpose of this diode is to
>forward pulses from trig in to end out, or to sink current from the
>trig input depending on what the signal input network does with end
>out...
>
>Convenient link:
>http://www.cgs.synth.net/modules/cgs114_dusg.html
>
>--
>/Ove
>
>Blog: <http://blog.gg8.se/>
>
>"Here is Evergreen City. Evergreen is the color of green forever."
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.