Boss SG-1 DIY complete project here

[Zero the hero]

Hey, people, here there's all the stuff you need to build a clone of SG-1 pedal.
SG-1 is an attack delay unit, it means that your guitar will sound as a reversed tape recording. It's a strange sort of volume swell pedal.

Schematic: http://offramp.supereva.it/SG1schem.gif
PCB: http://offramp.supereva.it/SG1pcb.gif
comp layout: http://offramp.supereva.it/SG1layout.gif
comp list: http://offramp.supereva.it/SG1comp.txt
important notes: http://offramp.supereva.it/SG1notes.txt

Please, read the notes before build it.
Let me know what you think about it, suggestions, errors and other stuff like this...

[Marcos - Munky]

Wow, thanks man. Did you built it?

[Zero the hero]

Yes, I've built it on a earlier version of the pcb. There's just one difference between my prototype and the one I posted here: I rearranged the IC pinout, cause I designed my earlier version around TL072 pinout, but I definitely chose 741 because I wanted to stay as much close to the original SG1.
I used the same components listed in the component list.
It works very well, no noise or strange behaviours at all.

[Marcos - Munky]

Thanks for the project, simple and cool. I'm thinking to build it.

[Mike Nichting]

Yeah, thanks~! It's on my long list of builds but I will do it~!! I have wanted one of these for a long time.

Mike N.

[Zero the hero]

It seems that this post will quickly be forgotten. If there's somebody who wants to publish it on a web site, contact me.

[Marcos - Munky]

If you want, I can put all in my site.

[Dan N]

Thanks Zero!

I'd like to build one without the fet switching. Do you know what can be eliminated from the standard circuit?

Thanks,
Dan

[Peter Snowberg]

The bypass in this one is a little different from fuzzes and others like that.

Instead of using switches to reroute the signal, it just turns the effect control voltage to a constant level. From glancing at the schematic, it looks like you could just omit everything in the switching circuit up to and including R11. You might need a resistor from the R11/P2/R20/C12 junction to ground to compensate for the switching going away, but that's just a guess.

[pollomartian]

Hey, can anybody reupload the files? Thank you!!

[armdnrdy]

Less than 2 minutes of google search time.

http://topopiccione.atspace.com/PJ03BossSG1.html

[blackieNYC]

Also a BYOC project and schematic
https://buildyourownclone.com/collections/envelope-triggers/products/lazysprocket