Hey guys. I'm curious, how would I go about wiring an ABY pedal with LEDs using a 2PDT switches?
I don't know if this is helpful but this is a schematic for a Morley ABY pedal from their website
http://www.morleypedals.com/abyes.pdf
or more complicated *but* a lot more ground-loop hum proof:
http://www.geofex.com/FX_images/oaspltr.gif
Even more hum-roof:
http://www.geofex.com/FX_images/spltr2.gif
thanks guys. Definitely not looking for anything too complicated. I have a Morley A/B/Y that I was rehousing, and I had to throw out the circuit board, so just trying to figure out how to wire the switches. The only wiring diagrams I have found thus far did not include LEDs.
hmmmm...i was messing around with a similar idea a while back for an AB...never got round to trying it out though...
but heres the idea i had..might be bad, might be good.....who knows!!!...not an ABY but hey ho... :)
(https://dl.dropbox.com/u/7464107/ABBOX.jpg)
Quote from: deadastronaut on July 25, 2012, 04:16:54 AM
hmmmm...i was messing around with a similar idea a while back for an AB...never got round to trying it out though...
but heres the idea i had..might be bad, might be good.....who knows!!!...not an ABY but hey ho... :)
(https://dl.dropbox.com/u/7464107/ABBOX.jpg)
It's only missing the Y but that looks simple enough.
What did you use to draw that up BTW?
awesome! no how would I add the Y? lol
I can't remember where I got this pic from... but it works fine :)
(http://i48.tinypic.com/f0vxy1.png)
This one works great too - but no LEDs:
(http://i46.tinypic.com/2zsuvqg.jpg)
^ cool.
@papasmurf: i used inkscape, with a pdf of pedalparts from my gallery....pedal vectorpack, click on download..... ;) very handy for designing..
http://www.aronnelson.com/gallery/main.php/v/chickpea/?g2_page=4
Here is one I've drawn up in DIYLC.
I hope it's useful for someone :icon_smile:
(http://i45.tinypic.com/96wyep.png)
cool nice one marcus.. 8)
Thanks Rob - it's pretty basic, but I've learnt so much in the last 12 months here that I though I'd start trying to give a little back!
DIYLC is a fun bit of software too :)
yep sure is, very handy, i do all my layouts with that now..nice n easy.
btw have you built the diagram above?
Yeah, I've been jamming with it tonight... going from my JetCity to my Vox... and then BOTH... and back again! haha
cool, i need to make one of these too ...always handy.....excellent. 8)
do both leds come on when in 'Y' mode?
Yeah, both LEDs come on when it is "A AND B"
The trick is remembering which output was active when you go back to "A OR B" mode.
It'd be cool to have some sort of indication of that... hmmm...
gotcha...cool..yeah with my brain that extra indicator would be handy... :)
I just made a quick change... does this look right?
(http://i49.tinypic.com/2w2g31u.png)
Hmmm... I just build the ABY Box with 3 lights above... and the LEDs don't seem to work correctly.
The middle LED (BOTH) only briefly flashes on and off when it's supposed to be on.
The 2 LEDs off the OR footswitch (OUT1 and OUT2) work as expected.
I'm not sure why it's not working ???
Any ideas anyone?
Give the both LED its own current limiting resistor. Running two LEDs off one resistor doesn't work reliably, because one LED will turn on at a lower voltage than the other, that one will light up and the voltage is then too low to turn the other one on. Both OR LEDs sharing a resistor is fine because only one is on at once.
Awesome thanks!
Here's the finished and verified layout :)
You can now tell which amp you will revert to when coming back from using both... no more trying to remember, or guessing!
(http://i49.tinypic.com/2itk97d.png)
cool glad you got it sorted..nice one man!. 8)
A quick question here: is the switch between the 2 outputs a ground lift switch?
Quote from: lucv on January 09, 2014, 07:57:43 PM
A quick question here: is the switch between the 2 outputs a ground lift switch?
Yep - if you flick the switch, Output 2 is no longer grounded.
If you're using a metal case to put this in, make Output 2 a plastic jack.
Quote from: mwynwood on December 12, 2012, 05:25:16 AM
Here is one I've drawn up in DIYLC.
I hope it's useful for someone :icon_smile:
(http://i45.tinypic.com/96wyep.png)
just wired up a AB/Y box using this diagram and I'm getting bleed through on whatever output is not active? I have double checked my wiring and its all exactly like the diagram. The signal coming through the non active channel is not full signal though it's like half if I had to give an example. Can anyone offer some insight for me? Thanks!
Quote from: karlholz on February 05, 2018, 10:16:32 AM
Quote from: mwynwood on December 12, 2012, 05:25:16 AM
Here is one I've drawn up in DIYLC.
I hope it's useful for someone :icon_smile:
just wired up a AB/Y box using this diagram and I'm getting bleed through on whatever output is not active? I have double checked my wiring and its all exactly like the diagram. The signal coming through the non active channel is not full signal though it's like half if I had to give an example. Can anyone offer some insight for me? Thanks!
Sorry to bump such an old topic, but I'm also getting bleed through between outputs. Does anyone know why?
Anyone build this one linked below? I got the transformers for it a few years ago but ended up selling the amps that required the pedal but now I want to get back to it.
http://www.geofex.com/FX_images/spltr2.gif
I haven't yet, but I also bought the transformers to build this as well and you're reminding me to finish it. My plan was to build a multi-channel splitter for studio use where I can feed five sources: amps, DIs, mic preamps, etc with switching and phase invert for each output. I'll post about it when I finally get to that part of my "to-do" list. :icon_biggrin:
Roger
Quote from: beedoola on August 16, 2023, 06:58:08 PM
Anyone build this one linked below?
http://www.geofex.com/FX_images/spltr2.gif
Yes, built it. Works brilliantly as an ABY. Has other uses. Recently used one to eliminate cross talk between 2 pedals when nothing else would work.
How did you build it? I think there's a veroboard layout around, but I'm not sure is 100% verified.
Rolled my own pcb from a layout posted back then. Like so many images, I think it's fallen foul of the 'not free any more' hosting policies.
Away but will check my archives on my return. I want another ..
Edit: this is the layout I used, along with an error fix
https://www.diystompboxes.com/smfforum/index.php?topic=105765.msg953800#msg953800 (https://www.diystompboxes.com/smfforum/index.php?topic=105765.msg953800#msg953800)
Edit 2: A phase reversal switch on one output is a really worthwhile addition accomplished with a 2PDT switch
And an alternative layout from generalguitargadgets
https://generalguitargadgets.com/effects-projects/boosters/amp-aby-switcher-box/ (https://generalguitargadgets.com/effects-projects/boosters/amp-aby-switcher-box/)
Thank you. I remember your thread. I just had to figure out how I can include the phase inverter on that layout. Maybe I can copy the ROG Splitter Blend U2A stage.
(http://runoffgroove.com/splitter-blend2.png)
Think of the ground and signal wires at the output as being connected to nothing but the either. Just use a simple switch to swap the leads.