16 Step Sequencer Quantized Vari-Clock Module

[ashleym]

http://www.musicfromouterspace.com/forums.html?CATPARTNO=&PROJARG=SEQUENCER_VARICLOCK%2FSEQUENCER_VARICLOCK.php&MAINTAB=SYNTHDIY&VPW=1269&VPH=550

Ray kept this one quiet. Looks really really useful.

Any thoughts?

[marvkaye]

Ray is a real wizard, isn't he? He just keeps grinding out cool stuff. I'm sure this will be another one added to my backlog once he starts making PCBs available. Lots of cool functionality there. Thanks for pointing it out.

<marv>

[Skrog Productions]

This looks a fun addition to an existing 16 step seqencer , tho i'll be making a new panel for mine , almost like an expanded version of the RYK M-185 sequencer, this will be great for backing rhythms for my music.
I wonder if the stages per step can be modded to 1 - 8 using a rotary switch (which usually have 12 poles) , just thinking aloud there , the pots for step length are probly the best option spacewise.

Good add on Ray , i like this

Dave.

[diablojoy]

damn that is good
i have 2 MFOS 16's in my backlog
will definitely be adding this to them.

[-minus-]

Yeah... I don't like the binary display in the bottom left corner though. I guess this could be replaced.

[ashleym]

The current layout doesnt appear to work best for live updating. As suggested by Dave a mechanical switch might be best. If the switch points at 4 steps, then it is four steps with no looking at the LEDs. You can also alter more than one step at a time. I need to read the circuit explanation as I dont know if the system stores the value for each step or "reads" it fresh each time. If it is a new read then the mechanical switch would work.

Also if there is a new read each step then could there be an option to apply a CV to each step to set the step length. Not a new one for each step as that is what we are already doing but doing a sweep to increase and decrease the step length? I had some thoughts a while back about have a voltage controlled clock for the sequencer speed but this wouldnt give an accurate quantised inter step rate (if you understand!!)

Finally, it would be pretty easy to add a 7 segment display. U4 on schematic page 1 has the 4 binary outs for the LEDs and you could take a feed from that. Ray's circuit uses the brightness of the LEDs to determine the accuracy of their setting, we might have to keep this or we could use better quantising?

http://www.allaboutcircuits.com/vol_6/chpt_7/9.html

[Skrog Productions]

Hi guys

A 7 segment numerical led display would look really good , if that was too difficult to implement i'm definatly reading up to see if i can use 8 position rotary switches , using different resistors to emulate the voltages needed for selecting the length i want .

Keep these ideas coming , DIY gold heh.

I've built a few different designers pcb's over the years but keep coming back for Ray's cool products.

Dave.
(off to read the diagram & pdf's again )

[diablojoy]

7 segment display sounds good also switch selection rather than pots i like much better and very easy to do 1 to 12 volts scaled. would need to rework that out for a +15 volt supply.
voltage control would be orsm and not too hard to add i think depending on whats actually in place - need to go over those schematics a bit more
edit : not hard to add individuals but a bit more circuitry required to do a overall single cv in though
i wonder how this thing would handle a quickly varying clock rate and pulse width though as all of my clocks do this one way or another
perhaps you cant have everything we shall see.

[sompost]

Are there any affordable rotary encoders that could be used for that purpose? Apparently there are ones that return absolute values (instead of "ticks") when rotated.

Otherwise I'd perhaps go with a 8 (or more) position rotary switch and an LED display for indicating duration, as suggested above. In general I prefer keeping "number stuff" digital.

[Skrog Productions]

Hi folks.

I had a quick scan at the plan and the step length duration works with the pots wired as simple voltage dividers , so , for my design i think i will wait till i get the pcb ,set the trimmer half way , wire up one pot to to measure , with a multimeter, the voltage from the wiper ( middle tag) and note down what voltage readings change the step length.
Then work out what resistors i will need for my rotary switches (1 clock length to 8 clock length per step will do me fine) then omit the 4 display leds , leaving me with visual indication of where the rotary's are set on the panel sticker .


Sound as a pound .

Dave.

[Skrog Productions]

If for correct operation the leds are required somehow i can just stick them on a bit of stripboard tucked inside the box but i think it will be ok without them.

Dave