Yahoo Groups archive

Cgs synth

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

Message

Re: Sequencer Project - It doesn't work!

2007-08-30 by bbluthang

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

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.