True bypass looper with 10 presets

gtudoran · February 08, 2010, 04:50:19 PM

Hello guys,

I bring you this schematic, not much to say. Is a workalike CArl MArtin octaswitch. Is not a clone it's build from scratch. Is not tested yet but i will make a protoboard at the end of the month.
Hope you will enjoy it.
I've uploaded a PDF file bc the schematic is way too big.
So here is the link:

http://www.analog-sound.com/site/schematics/SwitchNLopp.pdf

Best regards,
Gabriel Tudoran
Analog Sound

mth5044 · February 08, 2010, 05:13:26 PM

Wow! That was massive. I couldn't even find the input

I'm glad I'm over my foray into true bypass, or else I probably would have been all over this

Looks really cool. Have any pics?

gtudoran · February 08, 2010, 05:27:37 PM

It will be on a board @ the end of the month... i do have some projects right now that needs to be finished.

Processaurus · February 08, 2010, 09:00:45 PM

That's a lot of diodes! Thanks for showing off the design.

gtudoran · February 09, 2010, 02:52:02 AM

100 to be exact (only for dip-sw)

quite a lot.

JKowalski · February 09, 2010, 09:15:50 PM

I think this is an occasion where a microcontroller would come in handy. Just saying

gtudoran · February 10, 2010, 02:09:22 AM

Could be, but is a little difficult (for me at least) to multiplex-demulitiplex the signals ... as far as i remeber a PIC or Atmel uC doesn't have 10 ports for output.
And as far as i can say

is pure old-shool electronics

hehehe. Just joking ... I'm not a big fan of uC.

Best regards,
Gabriel Tudoran
Analog Sound

trixdropd · May 09, 2010, 12:35:55 PM

Wow!!! I would like to see pics of this and find out if it's verified. Looks just complex enough for me to try out!!

CynicalMan · May 09, 2010, 01:56:09 PM

That's insane! (By the way it's 120 diodes total

)
You might want to take a look at what RG has to say about DIP switches here:
www.diystompboxes.com/smfforum/index.php?topic=84424.msg703673#msg703673

jkokura · July 04, 2010, 03:40:54 PM

I'm interested in something like this. Are there any updates about what the project looks like?

Jacob

gtudoran · July 05, 2010, 06:36:09 AM

Quote from: jkokura on July 04, 2010, 03:40:54 PM
I'm interested in something like this. Are there any updates about what the project looks like?

Jacob

So far not... i'm in other projects for some clients and i didn't had time to but it on the line... hope that will be soon. I have the enclosure thow

).

Best regards,
Gabriel Tudoran
Analog Sound

the-caco · January 06, 2011, 02:23:35 PM

Quote from: gtudoran on July 05, 2010, 06:36:09 AM
Quote from: jkokura on July 04, 2010, 03:40:54 PM
I'm interested in something like this. Are there any updates about what the project looks like?

Jacob

So far not... i'm in other projects for some clients and i didn't had time to but it on the line... hope that will be soon. I have the enclosure thow ).

Best regards,
Gabriel Tudoran
Analog Sound

how is it going with the project ?

greets

asatbluesboy · July 09, 2011, 08:43:12 AM

Really curious about this one, but the link is broken.

gtudoran · July 10, 2011, 09:49:09 AM

Pfff i will try to repost the schematic - if i will find it

was a long time ago and i found out that using a ATTINY2313 (with some shift registers if you like more then 8 loops) is much easy

Best regards,
Gabriel Tudoran
Analog Sound

R.G. · July 10, 2011, 11:26:01 AM

Yep. I very much like the 74HC595 registers for holding output. They can be cheaper than getting a uC with more pins where you don't need the additional internal functions.

egasimus · July 10, 2011, 02:20:30 PM

N-Audio, a Bulgarian one-man FX company (he's on here as Nikolay) built something like this a while ago. Used a uC from the start, though

You can probably find it in the "huge pedals" thread in Pictures.

gtudoran · July 11, 2011, 01:38:22 PM

Quote from: R.G. on July 10, 2011, 11:26:01 AM
Yep. I very much like the 74HC595 registers for holding output. They can be cheaper than getting a uC with more pins where you don't need the additional internal functions.

Indeed R.G. And also it's too much trouble to build one - carl martin has a model that costs abou 250euro ... from a commercial point of view, building one is no use (my 2 cents ideea).

Best regards,
Gabriel Tudoran
Analog Sound

Galego · July 11, 2011, 02:10:42 PM

Quote from: gtudoran on February 10, 2010, 02:09:22 AM
Could be, but is a little difficult (for me at least) to multiplex-demulitiplex the signals ... as far as i remeber a PIC or Atmel uC doesn't have 10 ports for output.
And as far as i can say is pure old-shool electronics hehehe. Just joking ... I'm not a big fan of uC.

Best regards,
Gabriel Tudoran
Analog Sound

I'm in the process of making a 16 port true bypass looper with a PIC 18F4550 (40 pin), but I only use 3 outputs to control the 16 outputs, using 74HC595's. There's a project here by an Italian guy that should give you the information you need. He called it "midimind".

Galego · July 11, 2011, 02:13:45 PM

Quote from: gtudoran on July 11, 2011, 01:38:22 PM
Indeed R.G. And also it's too much trouble to build one - carl martin has a model that costs abou 250euro ... from a commercial point of view, building one is no use (my 2 cents ideea).

Best regards,
Gabriel Tudoran
Analog Sound

You call it trouble, i call it fun.

gtudoran · July 11, 2011, 02:54:30 PM

Quote from: Galego on July 11, 2011, 02:13:45 PM
Quote from: gtudoran on July 11, 2011, 01:38:22 PM
Indeed R.G. And also it's too much trouble to build one - carl martin has a model that costs abou 250euro ... from a commercial point of view, building one is no use (my 2 cents ideea).

Best regards,
Gabriel Tudoran
Analog Sound

You call it trouble, i call it fun.

Well

it is ... when you got the time

but i don't have too much time to reinvent the wheel. I did finished a prototype using AT-Tiny 2313 ... works very good, also has 2 modes: preset and stomp, but it cost a little to build a custom enclosure. i think i posted around here a preliminary version of this with the hexfile.

Best regards,
Gabriel Tudoran
Analog Sound

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True bypass looper with 10 presets