CGS89 Gate Sequencer's & some division

[Skrog Productions]

Hi there

Recently I've been patching Gates from 4 of my diy sequencers through a sequential switch for some changing patterns for 1 bass line , I really like the changing patterns but I'd also like to free up 3 sequencers .
While browsing the net for diy solutions , a popular search return was the CGS89 Gate sequencer with a couple of add on switch banks/ buffers (like Thomas White's 4 channel CGS89).

spent the last few weekends trying ideas for my panel, I think I'm close now , Ordered some boards from Ken and I need to knock together a couple of veroboard divider circuits , one is on the test layout panel already , the space at the lower right is for a rotary selectable/ single out divider.

I'm going for a 4 channel for sequencer 1 and a 2 channel for sequencer 2 , I'm limited by a panel of 250mm high by 200mm wide for this module , I would have made Seq2 a 4 channel too but I will be tight for space , also there are no individual step outs , I had a long hard think about them and decided I'd be using probably just 1 out per cycle , so I went for a rotary to select the desired step & 1 out socket (to trigger my burst generator ) .

Here is the blue test panel layout so far ....

Dave.

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[Skrog Productions]

CGS boards arrived yesterday , , decided to stuff the sequencer boards with components this afternoon & make an order to Rapid electronics for some panel switches & sockets etc.

Hope to get panel finalised through the week and get drilling next week .
Dave.

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[Skrog Productions]

Hullo .

I've finished the panel layout with the 2nd divider & final checked washer / nut spacings for text fouling , all seems good so far , going to start the vero-board stuff later (extra buffers for channel C & D / and the 2 dividers).

Need to order about 50 led bezels 5mm with recessed slope in black plastic for this and other projects , I usually get them from Rapid http://www.rapidonline.com/Electronic-Components/LED-Bezel-5mm-29304 ..... then I noticed ESR components near Whitley bay are doing a better rate http://www.esr.co.uk/components/products/frame-leds.htm

Dave.

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[Skrog Productions]

Extra buffers for gatemix / pulse rows C1 & D1 and a 4024 divider (Fonik) & 4017 divider (Yusynth) done & wired ready on vero-board .
Also got an off cut of 3mm aluminium 250mm X 200mm from Engineers/ metal workshop in town, needs a clean with solvent then ready for the drill template mid week after work.

Dave.

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[Skrog Productions]

Got the stickers done , 2 sets one drill template & one clean finish .
Raced to the shed after work and centre punched the panel(s) , started with the 4mm drill and piloted all crosshairs , then went over the switches / sockets with 6.5mm bit , then 8mm bit for led bezels , and finally 11mm for the 1/4" sockets , I give the face of the template sticker a good spray with cutting oil, messy , but the drills glide through the 3mm alum plate , there are burrs on the exit side but easy to take off , I use a very sharp old wood chisel to plane them off , then the back side of the panel gets a quick rub with wet n dry sandpaper , finally a spray all over with automotive carburettor cleaning spray , great for getting fine grit & swarf off the front surface , don't light a cigarette after spraying , a final wash with soapy warm water and the plate is good for the final finish sticker application .
More at the weekend .

Dave.

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[Skrog Productions]

Hi , panel now has the sticker applied , using a dash of washing up liquid in some warm water & a sponge , I soaped up the adhesive side of the clean final sticker , now with the stickiness briefly deactivated I can move the sticker around to line up as many cross hairs as possible , looking from the back of the drilled plate I can see through the holes and adjust the crosses to be centred ( there will always be 1 or 2 holes slightly off by a milimeter or so , unless you have a fully automated drill set up ). after drying off overnight the panel is now ready to lance / slice out the crosses on the finished front with a scalpel blade , then decorate with switches & sockets etc.

pic of the rear side under a table lamp to check cross alignments.

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[Skrog Productions]

Hi.
Finished fixing the hardware to the panel (apart from the led's & fixing brackets) , next job fix brackets & run a solid 1mm sq bare copper ground wire round the sockets ground tags & a few more bits of solid conductor for the pulse / gate switches common wires which will run down L1 and L2 of the toggle switch rows.

Dave.

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[The Bad Producer]

Great project and love the write up!

[Skrog Productions]

[Skrog Productions]

Wires..............

The tedious but necessary part of overtly switchy & sockety projects . a few pics of the wiring stage.

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[PHOBoS]

looks good Dave!

[wackelpeter]

second that what Phobos said, looks really impressive and also like a lot of work... guess i would spend a year to build such a thing

but one question: this is only giving variable gate or trigger pulses no CV's right?
i'd also like to see/hear what you're able to do with this nice pattern generator/sequencer when ready...

[Skrog Productions]

[Skrog Productions]

[Skrog Productions]

Yessss.
On the home stretch now , tested & powered up the CGS boards last night , both working a treat , yay ,Quick test set up as 2 X 8 step sequencers, after testing both, I tried patching end out to reset in on each sequencer (1 to 2 / 2 to 1) + setting both the switches to hold and it works great as a 16 step with the outs "or" switched to A1 & B1, fab .

Now to connect up & test / debug my veroboard then cable tidy with some ties and give final checks / tests .

pics & some sounds of it working the modular in next post over the weekend.


Dave.

[wackelpeter]

if someone had read the description and the title carefully this question would be obvious... my fault sorry... but neverless thank's for your reply even to such stupid questions...

[Skrog Productions]

no such thing as a stupid question

[Skrog Productions]

Cable tying done and testing of whole unit finished phew , nothing bad during final tests , I love it when projects work first time , heheheh .

To the modular system.......
to get audio recording for next post.....

Dave.

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[Skrog Productions]

Quick pic of the finished front panel of the dual CGS89 sequencer (Ken Stone)
Middle divider (Fonik) and the lower right single divider (Yusynth).
Before installation into the modular, a pic of it relaxing on the couch

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[Skrog Productions]

Sounds.......

I have patched up a few modules to the new sequencer for some simple tests.
The first mp3 has a diy M-185 sequencer clocking the dual CGS89 gate sequencer, the 4 mix outs A1/B1/C1/D1 are sent to a 4 in-1 out sequential switch (which is clocked from the middle divide by16 socket), this is firing an ADSR with 4 patterns which is working a VCA.
A TH102 xrvco is plugged straight into the vca.

The second mp3 has the unused M-185 sequencer cv out patched to the vco cv in , now the patterns get melodic .

The third mp3 has me patching in an extra gate to the ADSR from the lower left single divider on top of the gate sequence, odd division numbers 3 / 5 / 7 produce some offbeat patterns

Forgot to say I have all the divider & clock inputs common switched through the jacks to sequencer 1 clock in, plug the master clock in there and the whole module runs together

Hope to do a simple Epicyclus track to upload in a few days when the new module settles into the system .

Dave.

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gate sequencer test 1014.mp3
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gate sequencer test 2015.mp3
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gate sequencer test 3016.mp3
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[Skrog Productions]

Hi There

I now have a nice wee Epicyclus track I made today with the new dual CGS89 gate sequencer & many more modules , this may find it's way on to the new Epicyclus album .

Patched up I have 3 sequencers (Fonik vcps8 / mfos 16step / mfos 16 varistep) working 3 dual vco's which go to Ken Stone simple wave folders then into 3 vcf's and 3 vca's.
The new 4+2 gate sequencer module is giving patterns (via a sequential switch module) for the 2 mfos sequencers , the vcps8 works a highpass sound (about 2mins into the track).

Added for decoration I played some juno60 high pad notes (about 3 mins in)

This module will be used a lot in my set up, I'm finding it great for spicing up 8 step standard sequences , fantastic

Thanks for looking in to check the progress , cheers guys , and thanks to Ken Stone for speedy posting & great pcb's & also Fonik for divider 1 and Yusynth for divider 2.

Dave.

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Epicyclus - 4+2 sequencers.mp3
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[Blue Hell]

Nice track! and that wall of synth is getting very impressive

edit: some nice patterns on the gate sequencer test mp3s.

[Skrog Productions]

Thanks Jan , , glad you enjoyed the track

Dave.

[Cynosure]

Awesome track! Just what we needed for the new playlist

[Skrog Productions]

Thanks Jake

Dave.