Mobius Trip Looper

[benl560]

does anyone have any experience with this circuit from generalguitargadgets.com?
any help with materials/suggestions would be appreciated
ben

[darwin_deathcat]

The IC used in the mobius is now EOL (End of Life), and is very hard to find. Event he IC's used in both of the Tone God's (http://www.geocities.com/thetonegod/)loopers are either EOL (payback1.0) or very hard to find (payback1.1). The only loopable recording IC that is still in production AND realtively easy to find is the ISD1700 series. You are in luck as I have just finished laying out a prototype looper/sampler circuit with that chip. I've almost finished populating the board, but still have to finsh the off board wiring (there's a lot!).  Stay tuned, within a week or so, I'll have a schematic up, followed shortly by build photos and sound samples. FYI, I'm calling it the "Samp-O-Loop".

Cheers,

DarwinDeathCat

[The Tone God]

The 25xx sometimes can be still found around the web for Payback v1.0. The 1600B is availible in SOIC which is surface mount but can still be soldered with alittle skill.

I have a Payback v2.0 in the works but it won't be availible for alittle while.

Andrew

[Dean Hazelwanter]

The IC used in the mobius is now EOL (End of Life), and is very hard to find.

...Although Steve at SmallBear still carries them.

http://www.smallbearelec.com/Detail.bok?no=451

[benl560]

thanks guys. what chip is suitable for use as "4001" in this circuit. i cant find one anywhere. and what does i t mean "3 pin 0.1" center connectors" as used for the off board wiring. thanks again.

[oskar]

thanks guys. what chip is suitable for use as "4001" in this circuit.´

Smallbear has the 4001. It's a standard CMOS circuit.

[matgil]

what´s the pots resistance?

[Taylor]

All the pot values are shown in the schematic:

http://www.generalguitargadgets.com/pdf/ggg_mobius_trip_analog.pdf

I could just tell you, but here you can see that the answers to many DIY questions will be in the schematic.

[matgil]

yea, i saw this later
but i got another question
on the schematics the two caps of the side of ic are value 0.1mf
but this guy http://i179.photobucket.com/albums/w290/extester01/Img006.jpg by the foto has used a cap with another value
someone know the rigth value?

[Taylor]

Why do you think it's a different value?

[matgil]

´cause they´re bigger than the others as well the space between the terminals, cant be the same values

[danielzink]

´cause they´re bigger than the others as well the space between the terminals, cant be the same values

Could absolutely be the same value...just a different voltage rating....

Also - take a .1 63v box cap - vs a .1 600v orange drop....same value yet the orange drop is 4+x the size of a box cap.

This is an extreme example - but you get the idea...

Dan

[matgil]

dude, i having trouble to identify the caps
on the schematics he dont put the caps voltage as the type of then,
except the 3 eletrolytic the remaining is all of polyester?

[Taylor]

For voltage, you just need something higher than the supply voltage. It's good to use 16v caps or higher in 9v systems.

Cap types don't matter. If it says electrolytic, use electrolytic, but if it's non-polarized (there is no + sign on one of the leads) you can use ceramic, polyester film, polystyrene, whatever.

I wouldn't worry about that picture. Just go by the schematic.

[matgil]

ok, thanks for help
i apreciate to much.

[Chillums]

The IC used in the mobius is now EOL (End of Life), and is very hard to find. Event he IC's used in both of the Tone God's (http://www.geocities.com/thetonegod/)loopers are either EOL (payback1.0) or very hard to find (payback1.1). The only loopable recording IC that is still in production AND realtively easy to find is the ISD1700 series. You are in luck as I have just finished laying out a prototype looper/sampler circuit with that chip. I've almost finished populating the board, but still have to finsh the off board wiring (there's a lot!).  Stay tuned, within a week or so, I'll have a schematic up, followed shortly by build photos and sound samples. FYI, I'm calling it the "Samp-O-Loop".

Cheers,

DarwinDeathCat

I know this thread is ages old but I thought I would give it a shot.  Did you ever get around to making the Samp-O-Loop.... I would be very interested to see what you came up with.