Can anyone help me out with a schem for Y splitting a signal, with a blend for controlling between the two out puts?
Basically an A/B box with a knob instead of a switch.
So you can have output A or B or a mix of both.
Cheers
I like the Splitter-Blend at runnoffgroove
http://runoffgroove.com/splitter-blend.html
Which gives you a bit more options, with 2 effects loops, and may be more than you want - but it might do what you want quite nicely. having only one actual output and two effects loops might not accomplish what you want if yr plan is to feed two seperate amps or amp inputs or something, but if you just want to feed more than one effects chain, this way you don't have to feed 'em back together furthter down the line.
Also the article "Panning for fun" linked from GEOFex.com's main page
http://geofex.com/Article_Folders/panner.pdf
Has some great explanations in the begining, (although the math took me a little bit!) and has a nice panning circuit at the end of it - I built one of these into a rocker pedal enclosure from an old wah and like it a lot. I haven't built the Runoffgroove one.
Cool,
sfr, you're way ahead of me!
My plan was also to utilize a wah enclosure.
I want it to blend between a straight bypass and an effects loop.
However I only want it to blend between the inputs and have the output of the effects loop open all the time. This is because I want to use it with Delay/Reverb type effects and want the signal to 'linger' after I have returned to the dry/bypass position.
To do this I figured I could used GGG's mini mixer Schem http://www.generalguitargadgets.com/v2/diagrams/mixer_sc.gif
for the output stage, which would take care of blending the two signals together (with individual level controls as a cool bonus!)
I just was unsure of a good way of blending between the inputs of the mixer, one of which has a reverb/delay in front of it.(do I make any sense?)
The RG "Pan In Pan Out" schem may be very close but it will cut off the output of the effect when you blend back to dry (I think) because the blend stage is at the output of the effect.
But it may be modified? This is a bit out of my league (junior)
Ah - I see what you mean.
Well, R.G.'s "Panning for fun" article at Geofex should give you most of the info you need as far as specifics. For instance, you could go by following the second and third schematics to send your signal to more than one place. The formulas and stuff at the begining of the article help you figure out what values to be using. (That's just a portion of a schematic, of course - you still need to get power to the op-amps, and probably need input caps and all that regular stuff - someone else can explain those bits better than I, and you should find a good deal searching the archives. I know in one of the threads here talking about isolating the tone stack from the metal zone, someone gave me a lot of good pointers about how op-amps work that helped me when I was in a similar position, building a circuit section w/o everything in there)
If you have Craig Anderton's DIY Projects for guitarists, he has a simpler solution outlined in some schematics for making crossfade and panpot pedals out of old stereo volume pedals - basically using a dual-ganged pot, with each pot wired in reverse of each other (so as one goes up as you turn clockwise, the other goes down) you feed the signal through both halves of the dual pot, and then after each pot, you go to a seperate output jack. Basically, you've wired up two passive volume controls like what's in yr guitar right now, going to seperate outputs. You might want to put a small value cap across the terminals of the pot to lets some of the highs through as you turn down the volume (like you do in a guitar) to keep high end from getting lost as you turn down the volume. The advantages of this simple rig is it's entirely passive, so no battery. Of course, it being entirely passive is also it's disadvantage at times - I built one of these and ended up sticking a simple booster in front of it and it improved things a lot. Something like the AMZ design or something, since this circuit doesn't even really require a board, you can fit a booster in the same box, just put it after the input and before everything gets sent to the two pots.
here's what I mean by that passive circuit. You probably don't need this at all, but I explain, like, really poorly, and I'm bored and paint is open. . . this is w/o any input buffer or caps for saving tone, of course. This is about as simple as you can get for doing this. The two pots shown are the two halves of a dual gang pot. You can see that their wired with the input going to opposite lugs, though. I figure 250k or 500K logarithmic would be good? But use what you've got. If you've got whatever rocker enclosure yr using is gutted from something else and has a stereo pot use that.
(http://homepage.mac.com/sfjoshua/SC1.gif)[/img]
Wow, what a simple solution! Thanks a lot, I will try that out.