adding a blend knob to a circuit

[roflol]

i've been attempting to do this with not much luck at all i was wondering if i was going about it wrong as i was using this http://www.seanm.ca/stomp/minblend.html but on the send and return i was hooking it up to the send and recieve of the circuit is that wrong or?

[ehque]

sounds correct. you wired the send to the input of the circuit, and the receive to the output?

id say check the connections.

[OptimusPrime]

Cool I've been looking for a way to do this.

[roflol]

yeah i did it seems to just work like a volume though lin pots no good?

[Nick Kay]

I'm assuming the pot is wired correctly (one outer lug to the tip of the receive jack, middle lug to the tip of the output jack, other outer lug to the end of the buffer circuit.) Which effect are you trying to blend? Use some extreme settings to make sure the effect is not being all subtle and coy.

[roflol]

trying to blend a fuzz aye it looks wired right though i hate trouble shooting ;<

[sonicvi]

I'm assuming you have added a power source and ground connection to the Opamp? They are missing from that schematic.

[roflol]

i did the FET version and aye i added them

[cheapbasslovin]

Is it acting like a volume to your effects loop or your clean? If it is voluming your effect (likely) the problem is in the wiring of the fet section. If it is voluming (verb?) your clean, your problem is on the effect side. Maybe you already have this dialed I don't know.

[seanm]

What exactly is it doing? What does it sound like at the extreme ends of the pot rotation and in the middle.

[roflol]

just acting like another volume after the other one i tried changing the resistor values it killed all the sound with 2m resistors and did the volume thing with 1m

[Hookus]

Are you positive you don't have the source and drain on your FET reversed? Again, as another poster asked, is it acting as a volume for your effect, or for your clean? If you are positive the FET is connected correctly, can you please post your DC voltage at both drain, source, and gate.



Punctuation separates us from cavemen.


Just so you know.

[roflol]

Originally Posted by Hookus

Are you positive you don't have the source and drain on your FET reversed? Again, as another poster asked, is it acting as a volume for your effect, or for your clean? If you are positive the FET is connected correctly, can you please post your DC voltage at both drain, source, and gate.



Punctuation separates us from cavemen.


Just so you know.

it's acting a volume for the effect not the clean. The lil bit that sticks out on the FET goes to the ground amirite?

[ehque]

I thought you were supposed to replace the opamp with that circuit, so that "lil bit" should go into the blend pot, no?

[seanm]

Originally Posted by ehque

I thought you were supposed to replace the opamp with that circuit, so that "lil bit" should go into the blend pot, no?

Correct. The -ve side of the 10uF cap goes to the blend pot.

EDIT: I updated the schematic to make it more clear.

[roflol]

ahh damn i wired the fet wrong didn't realise it went GSD. Thanks for the help though guys!

[Hookus]

Cool, I figured that may have been it. Glad it is working for you.

[roflol]

haha i've done it right now but no clean signal is coming through everythings wired right to my knowledge? is there something else about fets i'm not getting do they need more volts to work or?

[ehque]

Test if it's working still? i'm not sure but did you damage it by wiring it wrongly the first place?

EDIT: What's GSD?

[sonicvi]

Originally Posted by ehque

Test if it's working still? i'm not sure but did you damage it by wiring it wrongly the first place?

EDIT: What's GSD?

Gate Source Drain