Wolfshirt momentary octave footswitch

[Mojo Fandangle]

I'm building a Wolfshirt with a momentary footswitch for activating the octave.

Can anybody suggest how I might wire the finger switch to the momentary footswitch so that it turns the octave on and off?

Thanks in advance for any advice people might have






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[TGP39]

Hey Mark.  If you look at the octave switch on the PCB of the Wolfshirt, you will see three holes.  The square hole connects to one end of your footswitch and the middle hole connects to the other end of your footswitch. Make sure your footswitch is not a momentary footswitch. It needs to be a latching Footswitch for your desired purpose.

Steve.

[micromegas]

As I understand, Mark wants to have the spdt to use either octave mode or no-octave mode and still use a momentary footswitch to engage the octave when you are in octave mode.

I think it can be done by wiring a normally-open spst between lug 1 of the SPDT and the connection in the pcb (the square pad), but I'm not sure.

[TGP39]

As I understand, Mark wants to have the spdt to use either octave mode or no-octave mode and still use a momentary footswitch to engage the octave when you are in octave mode.

I think it can be done by wiring a normally-open spst between lug 1 of the SPDT and the connection in the pcb (the square pad), but I'm not sure.

Hmmm... I didn't read it that way, but maybe you're right Adán?

Steve.

[micromegas]

As I understand, Mark wants to have the spdt to use either octave mode or no-octave mode and still use a momentary footswitch to engage the octave when you are in octave mode.

I think it can be done by wiring a normally-open spst between lug 1 of the SPDT and the connection in the pcb (the square pad), but I'm not sure.

Hmmm... I didn't read it that way, but maybe you're right Adán?

Steve.

I reached that conclusion by looking at the photos, as he has drilled holes for both the spdt and the spst. He also asks how to wire the finger-switch to the momentary footswitch.

I don't know. Maybe Mark can explain what he wants to do exactly.

[Mojo Fandangle]

As I understand, Mark wants to have the spdt to use either octave mode or no-octave mode and still use a momentary footswitch to engage the octave when you are in octave mode.

I think it can be done by wiring a normally-open spst between lug 1 of the SPDT and the connection in the pcb (the square pad), but I'm not sure.

Hmmm... I didn't read it that way, but maybe you're right Adán?

Steve.

I reached that conclusion by looking at the photos, as he has drilled holes for both the spdt and the spst. He also asks how to wire the finger-switch to the momentary footswitch.

I don't know. Maybe Mark can explain what he wants to do exactly.

You're exactly right Adan. I should have been more specific.
I want the regular spdt switch to turn the octave on and off as normal. I'm hoping I can wire the momentary footswitch to it so that when the regular switch is in off position, the momentary footswitch can activate the octave when pushed down and turn it back off when released.

Steve, thanks for your suggestion. Am I right in thinking that if I wire it similarly to how you've suggested but wire holes 1 & 2 to the finger switch's 1 & 2, then run from that 1 & 2 to the momentary footswitch??

[TGP39]

Hi DM. I don't think that would work. If you're using a momentary switch and you want to use the octave function when the finger switch is off, I don't think running the wires to the footswitch will change the fact that you still have an open circuit back at the finger switch. I'm hoping someone who knows more about circuit topology will jump in here.

Steve.

[Mojo Fandangle]

Thanks Steve and Adan.

I'm not sure if my logic makes sense but would the wiring shown in this photo cause both the footswitch and the finger switch to turn the octave on and off

[alanp]

Parallel the switches is what I thought.

[TGP39]

I was thinking that as well Alan.

Ok, looking at the 2015 Wolfshirt schematic, it looks like the octave is on when lug 1 and 2 are connected. Lug 1 is the square hole. If the finger switch is in the octave off position then lugs 2 and 3 are connected.  If you hook up your footswitch to lugs 1 and 2, that should reestablish the connection between lug 1 and 2 I THINK and therefore, give you momentary octave effects when the NO SPDT footswitch is pressed.
Take a look at the schematic and try to see where the octave switch is. Imagine a swinging door and lug 2 is the hinge part of that door. Now when that door swings to lug 3, the octave is turned off because it created an open circuit between lug 2 and lug 1 ( remember lug 1 is the square hole), BUT BY REESTABLISHING LUG 2 to lug 1, you reestablish the octave connection when the footswitch is wired to lug 1 and lug 2 AND the footswitch is pressed down. I think this will work.

Steve.

[Mojo Fandangle]

I was thinking that as well Alan.

Ok, looking at the 2015 Wolfshirt schematic, it looks like the octave is on when lug 1 and 2 are connected. Lug 1 is the square hole. If the finger switch is in the octave off position then lugs 2 and 3 are connected.  If you hook up your footswitch to lugs 1 and 2, that should reestablish the connection between lug 1 and 2 I THINK and therefore, give you momentary octave effects when the NO SPDT footswitch is pressed.
Take a look at the schematic and try to see where the octave switch is. Imagine a swinging door and lug 2 is the hinge part of that door. Now when that door swings to lug 3, the octave is turned off because it created an open circuit between lug 2 and lug 1 ( remember lug 1 is the square hole), BUT BY REESTABLISHING LUG 2 to lug 1, you reestablish the octave connection when the footswitch is wired to lug 1 and lug 2 AND the footswitch is pressed down. I think this will work.

Steve.

Thanks Steve, much appreciated. That sounds like the answer. I'll hook it up with alligator clip cables first to test it.
From what you've explained, I think I might even be able to wire it so that the momentary switch can be use in 2 ways.
1) So that it turns the octave on and off as I originally planned
2) So that when the finger switch has the octave turned on, the footswitch will turn it off when pressed down.

Anyways. Thanks to everyone for your help.
If I get it working I'll post a wiring diagram and a quick video of it for anyone who wants to do the same mod.

[TGP39]

Unfortunately, number 2 won't work with this setup, but it's definitely worth a try. Best of luck.

Steve.

[kgull]

Just wire it like a 3 way lighting switch:


Call pin 1 hot and pin 2 is the switch that attachs to the light. This way you can toggle the octave with the momentary switch.

You'll need a switch like this to pull it off though http://www.taydaelectronics.com/1pdt-stomp-foot-pedal-switch-solder-lugs-2.html

[TGP39]

That would work well Kgull, but can you think of a way utilizing the SPST momentary he already has?

Steve.

[kgull]

Short of using a relay or some kind of CMOS device to emulate a spdt, momentary octave on is about as good as it gets.

This setup should work just fine:

Thanks Steve and Adan.

I'm not sure if my logic makes sense but would the wiring shown in this photo cause both the footswitch and the finger switch to turn the octave on and off