Later boards only needed 6 links because I found a way to eliminate the outer links.
KenOn Tue, Oct 3, 2017 at 12:22 AM, Paul Bower paul@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:Just want to check something on the switchboard - I have a board that has only six wire links marked on the silkscreen - the inner six links between the rows of switches
I realise on the current documentation that there are a further six wire links on the edges of the board. My PCBs don’t have Rev numbers, but am I right to assume these are earlier boards that don’t require me to figure out the extra six links ?Just to re-iterate, apart from the column output weirdness (partially fixed by poor connection on an LED) that Gate Sequencer has been working fine for a number of monthsCheersPaulOn 2 Oct 2017, at 08:46, Paul Bower <paul@...> wrote:Okay, that’s sort of good to know - dry joints - and I used to be so good at soldering :-)CheersPaulOn 1 Oct 2017, at 23:46, Ken Stone otherunicorn@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:You have a bad jack or have miss-wired it, or perhaps you have broken the pad where the wire is soldered from the PCB. I can't think of anything else that would cause this problem.On Mon, Oct 2, 2017 at 3:47 AM, Paul Bower paul@... [cgs_synth] <cgs_synth@ yahoogroups.com> wrote:…Sorry, forgot to add: The end column Full & Pulse outputs for all eight steps on all four rows are just fine
Hello there,
I’m fairly certain this was all working fine, but yesterday I realised that the Step Out on Step 5 wasn’t working. It may have been like that for some time because strangely the LED was working just fine, just no output at the jack. I checked everything on the main board, replaced the BC547, then realised that the LED wouldn’t light either under certain switch conditions for that step and the previous step - which I’m certain I would have noticed. After an afternoon of power off/try something/power on cycles, the problem has spread to Step Two - so I’m wondering if the 4017 might be on it’s way outGot to order a 4017, and I hate desoldering, so I’m wondering if you’ve any thoughts ?BTW I tried cutting loose my extra capacitor, per the reset fix below, but that didn’t make any differenceCheersPaulOn 25 Jun 2017, at 10:47, Ken Stone otherunicorn@... [ cgs_synth] <cgs_synth@yahoogroups.com> wrote:It would miss an entire step if it was a problem.On Sun, Jun 25, 2017 at 7:23 PM, Paul Bower paul@... [cgs_synth] <cgs_synth@yahoogr oups.com> wrote:You mean a kind of lag between the reset event and the clock advancing to step 2 / step 3 etc ?
I’ll check for that - I just tacked the extra cap on the back of the board, so it’s not so much of a faff to try some lower valuesOn 25 Jun 2017, at 10:17, Ken Stone otherunicorn@... [ cgs_synth] <cgs_synth@yahoogroups.com> wrote:The only "issue" having the reset cap to big is that it may prevent a clock pulse from advancing close to when the reset occurred.On Sun, Jun 25, 2017 at 6:42 PM, Paul Bower paul@... [cgs_synth] <cgs_synth@yahoogr oups.com> wrote:Good to hear from you Ken - hope things are good over thereSince that’s all I had, I just put a 47nF cap across the existing 10nF and that did the trickIn case anyone else comes across this, it was a very old board. I could get the gate sequencer to reset from its own 12V step outputs, but not from an LFO that was sending a 0-8.5V squarewave (and certainly not from a variety of things I tried at around the 5V mark)So all fixed - I can reset on a 4.5V pulse nowI assume that if I get misfiring problems now then I just need to reduce the value of that bridging cap a little ?CheersPaulOn 25 Jun 2017, at 02:21, Ken Stone otherunicorn@... [ cgs_synth] <cgs_synth@yahoogroups.com> wrote:I should work that way already. Perhaps increase the size of the 10n reset cap to 47n to let a bigger pulse through.
On Sun, Jun 25, 2017 at 6:44 AM, Paul Bower paul@... [cgs_synth] <cgs_synth@yahoogr oups.com> wrote:Hello there,
Just wondering if anyone could recommend a way of modding the reset input to accept +5V instead of +12/13VCheersPaul
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