Cgs synth

Hi
thanks for posting the designs, its still a bit hard to grok what
your're doing but Ken will almost certainly be right - look for
construction error(s) - something left unsoldered, wrong way around,
etc....sometimes its better when the smoke comes out cos then you know
exactly where to look.
good luck
Andrew

--- In cgs_synth@yahoogroups.com, "stuadh" <stuadh@...> wrote:
>
> Hi,
>
> I've posted the circuit diagrammes for the sequencer. Please excuse
> the My First Circuit by Jonny aged 8 look. I've missed out some of
> the circuit that doesn't affect the main body for clarity. It can be
> found in Files/Programmer
>
> Yours Aye
>
> Stuadh
> --- In cgs_synth@yahoogroups.com, "stuadh" <stuadh@> wrote:
> >
> > Hi,
> >
> > Very kind of you to help.
> >
> > I'm using a Doepfer Sequential Switch that I had a spare board from.
> > It runs from the 4 Rows and can really be considered as separate to
> > the Sequencer (even though it is on the same panel).
> >
> > For the 16 steps, I just wired up 16 boards. Why do anything by
> > (literally) halves?
> >
> > I'l check the output of the TL072s (driving the pots) at the weekend
> > when I have some time. I'll also try and get my circuit diagramme
> > online although it will prabobly be hand-drawn; I've had no luck with
> > the circuit editor programmes I've tried.
> >
> > Once again,
> >
> > Thanks you,
> >
> > Stuadh
> >
> > (happy to private if you wish stuadh@)
> >
> > --- In cgs_synth@yahoogroups.com, "bbluthang" <jumpswine@> wrote:
> > >
> > > Hi
> > > I am willing to help but am unsure of your project
> > > Are you combining a Sequential Switch with a Seq/Programmer?
> > > >
> > > > I've checked that I'm putting +15V, 0V and -15V (actually
+14.8V
> > > > and -15.2V...is this significant?
> > >
> > > shouldn't matter
> > >
> > > On reflection, this is probable cause by the LED
> > > > running to GND through the trigger switches, and I probably
need to
> > > > wire it to GND via a resistor (prob 1K5).
> > >
> > > Leds always need a resistor to limit the current thru them,
mainly for
> > > their own self protection, the resistor can go between power(
for +V)
> > > and anode or ground and cathode, you only need one but it must be
> there.
> > >
> > >
> > > > the 1st and 16th steps, the idea being that I could reset to these
> > > > steps at the touch of a button. None of these buttons work.
> > > >
> > >
> > > What have you done to get a 16 step sequencer using Ken's
boards? Not
> > > that it is difficult or wrong, just non-standard.
> > >
> > >
> > > > Also of significance is that there is the same output from
> each Row,
> > > > but that this is not affected by moving any of the knobs. This is
> > > > about 50mV.
> > >
> > > this is basically 0 - nothing is coming in. have you checked the
> > > outputs of whatever is driving the pots?
> > > >
> > > >
> > > >
> > > > I know it is a bit of a black art trying to diagnose these
things in
> > > > person, much less by remote but I'd really appreciate some help,
> here
> > >
> > > if you could draw up a schematic of your mods, by hand is ok, it
would
> > > help a lot. post it in files
> > > cheers
> > > Andrew
> > >
> >
>