Cgs synth

Hi,

Almost certainly you will find the problem is a bad solder joint or a
components in the wrong place or wrong way around, or some other sort of
construction error. The parts are pretty robust and will survive most of
that sort of construction error.

Ken

>
>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
>>
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>