How to build a True Bypass looper with DIP switches

[LoonDawg]

Hey all,
I have build a bunch of TBL (True Bypass Loopers) so the question isn't with that directly, but I just stumbled upon a really cool take on TBLs in a smaller container (although I know they are not the first to make TBLs with DIP switches, just the first I've seen done simply and small)

http://www.flexreaction.com/

I normally use the clicky 3pdt, but I assume that they are soft touch switches, but are they still 3pdt? Is there a microcontroller or some sort of chip in there or is everything just wired into the switches and then the DIPs?

It is probably too complicated for me to try building the more I think about how it works internally, but I would love to get some input because I think it would be a fun build, if I can get things working properly.

Thanks

[LoonDawg]

I am currently reading this http://www.geofex.com/Article_Folders/fxswitchr/fxswitchr.htm to see if it is the same thing as I am looking for or not. If it is and you know, feel free to point out my redundant post (and I apologize, I found the other post after posting this and changing my search a bit)

[LoonDawg]

I'm pretty sure (upon further research) that I am probably out of my depth and it is a much much bigger project than just adding a few more switches to a regular TBL. Oh well

[pappasmurfsharem]

Oh man look at this marketing.

Moreover, by using our pedals, the users will get better sound quality

*laff*

[LoonDawg]

haha, there are other grammar issues but I think it's based out of Thailand so I just chalk it up to translation issues

[gtudoran]

If you would like something like Carl Martin Octa Switch then here it is the schematic that i've designed some time ago, but IMHO is easier to use a uC based looper (there is also a topic of mine regarding this subject around here)

So this is the schematic (the technique that i've used is called diode decoding): https://dl.dropboxusercontent.com/u/15275178/SwitchNLopp.pdf

Best regards,
Gabriel Tudoran
Analog Sound

[LoonDawg]

Thanks gtudoran

That is what I call a lot of information on a schematic. I will see if I can make any sense of it (still a beginner here) and go from there

[TheWinterSnow]

If you wanted to like I would, I would use soft switches, they only need to be SPST Momentary switches.  They are much cheaper and more reliable too.  A soft latching toggle for each switch would be all you would need as a control to the DIP switches.  That consists of two BJTs and, two resistors and two caps IIRC, I will have to pull it up.  Each DIP switch would be connected to their respective latching circuit and the similar outputs to a relay coil for each loop.  You now have an easy looper.

I may have to schematic something up, should be very small and very cheap to make.

[LoonDawg]

A schematic would be awesome, and soft switches would be a must. I'm still sorting through the details (and relying a lot on helpful peeps like you who know a lot more than I do about this) and trying to learn

[TheWinterSnow]

I am working on it, may not be able to use relays for switches if you want to keep part count and PCB size low unless someone can help me decipher the data sheet for the CD4503B Tri-State buffer which I am using as a buffer to drive a 9v Relay coil, 1 for each buffer output to be exact.

http://pdf.datasheetcatalog.com/datasheets/70/109494_DS.pdf

If not I will just move over to optocouplers and be done with it.

EDIT: or actually just use a high current JFET switch, the couplers would take up a lot of space to control a simple loop.

[Processaurus]

Have you seen this pre-programmed uC solution from Molten Voltage?  More power to you if you wanted to get involved in programming, and make something from scratch, this would actually be a good way to get involved, but, if you just wanted to build something, might be worth checking it out:

http://www.kaom.com/PedalSync_MV_62_9_Switches_chip_p/chip_013.htm