Adding a blender to a fuzz

[Bassman203]

So I'm thinking of adding a blender to a fuzz pedal I made to make it sound better with a bass.

Here's the blender circuit I've been looking at.


And here is the basic idea of the fuzz pedal circuit


In the blender, what does V_r stand for? I feel like I found out at one point but I can't remember. Is it for a battery? Because that leads to my next question, I know it's an active circuit, but I don't see a + or - for a battery. Do I need to wire it a special way to power the blender along with the fuzz?

Would the input be after the red battery snap, then the send go to the point by C6 that says 'to + battery snap?' Then return comes from the point by C1 where it says 'To S1 #4' and output goes to S1 #4?

And, would I be best off just making a separate blend pedal with send and return jacks?

I think I'll use the TL074 Op Amp. Any comments, suggestions?

Lastly, are there any other things I can do to maximize bass response in my pedal? Change out a resistor or something?

[bongomania]

Vr is the + voltage connection. You could just Y-split the red battery wire to that point. A separate blender box is always a useful thing to have around, but since you're building it from scratch anyway, may as well put it in the same housing as the fuzz. You could try increasing the value of C1 and C7, depending on what value you're starting with.

[MAMMOTHvolume]

Originally Posted by bongomania

Vr is the + voltage connection. You could just Y-split the red battery wire to that point. A separate blender box is always a useful thing to have around, but since you're building it from scratch anyway, may as well put it in the same housing as the fuzz. You could try increasing the value of C1 and C7, depending on what value you're starting with.

Vr is the voltage reference normally 4.5v you can get this via a voltage divider.

A voltage divider is normally two resistors of the same value one coming from the source and one going to ground and you probably want a cap of about 22u on it aswell to smoothe it out and reduce noise


i might have to make a thread about adding a blend circuit to a pedal.

edit; you may want to try a different circuit to that also for a first build like a bazz fuzz or something similar, it'll get a better sound than that circuit and have alot more output on tap.

a tl074 is a good bet i also like lm358s for clean buffer circuits.

[Bassman203]

C1 is .1 uf
c7 is .01 uf

I'm confused what is right/necessary now, would anyone like to clarify and say which of the two above I need to do?

[Bassman203]

Would this circuit be better, or are the extra transistors unnecessary?

[rcubed]

Originally Posted by Bassman203

Would this circuit be better, or are the extra transistors unnecessary?

First off, those are op-amps, not transistors.

Depending on the signals entering, the circuit below is another way of doing a blend.

[Bassman203]

Also, should the .1u caps be polyfilm?

[Bassman203]

Yeah, sorry I knew they were op amps I just had my mind on something else.

[Bassman203]

In this circuit, is only one tl074 needed?

This picture made me realize that one ic might do it all

[Holy War]

All that might as well be ancient Chinese calligraphy to me haha, but best of luck to you.

[rcubed]

Originally Posted by Bassman203

In this circuit, is only one tl074 needed?

This picture made me realize that one ic might do it all

Yes.

[Bassman203]

And, sorry for all the questions, but would a linear or audio pot be preferred?

[rcubed]

Originally Posted by Bassman203

And, sorry for all the questions, but would a linear or audio pot be preferred?

Either would work but I'd go with linear.

[Bassman203]

If I build a separate stompbox for the blender, should I make it true-bypass and use a 3pdt? That way I could do an in use led easily, but it would cost a lot more.

Or would it make more sense just to do a dpdt switch?

[Bassman203]

Where do they sell center detent pots?

[Bassman203]

Well, I guess it's not necessary since it's unlikely my favorite setting would be dead center anyway