Buffer Question?

[Kentone]

With this schematic, to add another out put jack to run it into 2 guitar amps, what do I need to do?

Do I need to add again, the out put stage of the 0.1uf, 10uf, and the 2.2m to do another out put jack?
Or can I just jump off of the output jack thats already there to another jack?
I want to put the two in parallel.

Here is the link: http://www.muzique.com/lab/superbuff.htm

Also, how could I do an isolated output jack on top of having these 2 outputs? So that would make 3 outputs, 2 in parallel, and 1 isolated.

If you could draw it into the schematic, that would be great!

Thanks,
-Aaron <><

[niftydog]

with this schem, you can probably get away with adding another C2,C3,R7 combination to tap off a second output. Maybe double the size of both "R7s" to keep the load impedance in the same ballpark.

What do you mean by "isolated"? I assume you mean totally isolated, which would require an audio isolation transformer, which would not be trivial to add to this circuit, but it could be done.

[Kentone]

Ok cool! Thats kinda what I thought I was going to need to do. Im not going to worry about the isolated output for right now. I don't really need it anyways.

Thanks Nifty!

[Kentone]

hopefully this thing will make a difference. What do you think? Is this a good quality piece?

[gaussmarkov]

hmm.  i think you have to be careful about a ground loop plugging into two amps.  best do a forum search on that topic and read up. :?

[Kentone]

how do I wire up this IC curcuit? Its got 4 pins on each side, but the drawing only says 6 hookups per IC. How do I wire it and what is the "plus & Minus" signs on the IC's mean?

thanks

[ninoman123]

One of those pins on your IC is where you plug in the juice and one is ground. Most schematics dont put them on there because it is implied that you kinda need to plug them in. The plus and minus signs indicate inverting or noninverting inputs. Look up a pinout for your IC so you dont mess it up. Ive done it before its not hard to do.

[gaussmarkov]

how do I wire up this IC curcuit? Its got 4 pins on each side, but the drawing only says 6 hookups per IC. How do I wire it and what is the "plus & Minus" signs on the IC's mean?

thanks

look at the parts layout picture referenced linked at the bottom of the schematic you pointed to.  generally, the numbering of the pins works like this.  start at the "top" of the ic, where the notch is.  1 is at the upper left and 2 through 4 continue down that side.  then 5 is opposite 4 on the right lower corner and 6 through 8 continue up the right-hand side so that 8 ends up opposite 1.

you can read about this in the FAQ.  search for the word "pins".

[Kentone]

Ok I think I got it now! Thanks everyone for the help!

-Aaron

[Kentone]

One more question.

On this mini booster, I want to add a tone control. Can someone put it in the schematic. Also where does the DPDT or TPDT switch come in on this pedal???

-Aaron

[gaussmarkov]

On this mini booster, I want to add a tone control. Can someone put it in the schematic. Also where does the DPDT or TPDT switch come in on this pedal???

hooking up the switch, the led, and the power (battery or dc power jack) is pretty much the same for all pedals.  i suggest that you look at the way the projects on generalguitargadgets are hooked up.  indeed, hooking up the minibooster is shown there.

fwiw:  in my experience, you are unlikely to find someone on this forum who will draw schematics for you.  it might happen, but i am doubtful.  (next, someone will prove me wrong ).  the general approach that i see on this forum is mutual help in experimentation.  participants generally do as much homework as they can before bringing a question to the forum.  they would do things like look for the information on web that i have been referencing for you in my replies to your questions.

for the tone control, you can do the following things yourself:  search the forum for discussions of tone controls, look at how tone controls appear in circuits that have them and draw some (tentative) conclusions, and try out what you learn with your own build of the minibooster.  by the way, that experimentation is easier if you use a breadboard build rather than a perfboard or pcb build.

you may not come up with the tone control you want, but you will learn a lot in the process and have the kind of questions that seem to receive rapid responses on this "diy" forum.  i hope this helps.  i am sure that this community wants you to enjoy participating.

[Kentone]

Yeah that helps out alot, good thinking!

Aaron