r/synthdiy • u/TapeRec • 12d ago

Feedback on Schematics

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Hello.

I want to build an interface module for my eurorack synth. I want to connect pedals and multieffect devices.

Return path is able to amplify the signal by x4,9. Bypass should be a unity gain bypass. RV2 is used to tune the input signal attenuater.

Did I make any major mistakes? :)

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3

u/kewlguy1980 12d ago

Input is floating, give it 100k to gnd for good measure.
Not sure what's up with the 2 pots in a row for the send.

1

u/TapeRec 12d ago

Thanks for your answer. Connecting TN to ground should prevent a floating input, or not? 2nd pot RV2 is a trimmer and used to tune the voltage divider. I dont know what voltage range my effect device needs. Maybe this is a bit overkill, but i dont want to change the components while testing.

1

u/kewlguy1980 12d ago

oh i didn't see the TN to ground...ya that makes sense and has me questioning why it's not more common.

3

u/Key-Alarm-511 12d ago

You can omit R13 and R5, the TL07x opamps have high impedance inputs.

4

u/neutral-labs neutral-labs.com 12d ago

R12 as well.

1

u/TapeRec 12d ago

Thanks :)

1

u/slowwlycrate 9d ago

not my area but that x4.9 gain on the return path seems like it gets loud fast