6PDT CMOS or Relay Switching

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

I'm toying with the idea of adding a Control Bus section on a 19" panel I'm designing.

There would be 2 bus lines each with CV, Gate and Trigger. The feature I'd like to add is a "flip-flop" switch that would swtich all of Bus 1 to Bus 2 and visa versa via one switch. I'm really only interested in manually triggering this, not using an gate input, though a gate input would be cool in some situations.

Here's the layout as I see it, represented with 2 3PDT switchs. What I don't really know how to do is to add one switch to trigger what is essentially a 6PDT action. All the 6PDT switches I've seen are either too expensive (like over $300), or are PCB mounted push-push switches and I'm not very keen to do PCB mounted panel components and don't like the lack of visual feedback on push-push buttons.

So, I was thinking that CMOS or relays would be the answer. Relays would probably be simpler to implement, but I'm not sure if I'd get glitches in the CV lines when the filp-flop is triggered. I'm a noob when it comes to designing circuits, though, and can't readily figure out how to implement a CMOS solution.... thinking

ControlBus.JPG

Description:

Filesize:

13.92 KB

Viewed:

8106 Time(s)

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

Oh, and what I'm wanting to use this for is essentially to provide a partial preset ability to the panel.

The panel will contain 2 VCO, 2 VCF, 2 VCEG and 2 VCA. All of which will be normalized to each other and will also have switches to connect them to either of the 2 Control Bus lines.

But if I put all of them on Bus 1 and had a sequencer plugged into Bus 1, and then a different sequencer on Bus 2 playing an alternate pattern and/or key, I could switch all the modules to Bus 2 instantly with the flip-flop switch. Instant new pattern/key. Very Happy

M.HAPPY!

andrewF · Posted: Fri Jul 16, 2010 8:20 pm Post subject:

maybe a 6 pole, 2 position rotary switch is the cheapest and easiest option

like this one

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

tjookum · Posted: Sat Jul 17, 2010 2:03 am Post subject:

Im not really sure if I understand you correctly, but if you're looking for a cmos analog switch I can highly recommend the 4066.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

It switches when 2/3 of Vdd is achieved and is very bulletproof to wire up.

andrewF · Posted: Sat Jul 17, 2010 9:05 am Post subject:

4066/4016 will certainly work but you will need 3 of them.

Rykhaard · Joined: Sep 02, 2007 Posts: 1290 Location: Canada

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

andrewF · Posted: Sun Jul 18, 2010 10:04 pm Post subject:

how about 24 pole 2 pos ($4.95), 6 pole 5 pos or 6 pole 3 position
from Electronic Surplus?

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD