momentary switch question. is a 4pdt necesary?

[dstahl]

I built a tremulus lune via a tonepad pcb http://www.tonepad.com/getFileInfo.asp?id=84 and I would like to add a momentary switch ala this http://www.voxblues.com/projects/tremulus/album/index.html. I know he used a 4pdt toggle switch to go between the momentary and his 3pdt main switch.
  I am curious if I will need to do the same or if there are other options to wire in a momentary engage switch. The 4pdt toggle switches are hard to find locally. and I would hate to have to order just one from mouser and pay just as much as the switch for shipping. If needed I will bite the bullet. 
also I should add that in the pcb I can run the LED leads directly off the board (it blinks in time with the LDR) so I wouldn't need to use the extra lugs on my main 3pdt switch. right? (again noob here so I question almost everything I think I know)
  thanks
-D

[spudulike]

Left switch is Bypass, right switch is momentary, engages trem when effect is in bypass.
Full article is http://www.pisotones.com/EA-Tremolo/EA-Tremolo.htm

[dstahl]

Thanks Spudulike!!!
  ok. my spanish isn't good enough to follow that site. But I think I can follow the schematic ok. A couple of questions though.
This would still be true-bypass? Is there no need for ground lugs on the switches? (this could just be because I am used to doing 3pdt switches w/ led, and the ground is needed for that)
  and I am assuming "MILL-2" is for millenium bypass, which I don't think I will need. right?
I tried searching for other momentary bypass schematics that would help explain it but have been coming up short. I can sort of follow the flow of what is going on in that schematic, and I have half a mind just to wire it up like this and see if it works without understanding it. I just wanted to double check these few things.

-D

[mattpocket]

Looks good to me mate... it will take about 5 minutes to wire that up, you might as well give it a whirl and see what happens... All our american friends will be around soon, so they will be able to help more...

[dstahl]

I feel stupid for asking this... but any idea how I would do this with a 3pdt switch and a dpdt momentary switch?
using the negative ground wiring
does anyone already have a wiring schematic for this type of config?

[slacker]

This should work



Wire the momentary switch so the bottom and centre lugs are normally connected. Wire the led like shown on the photo you posted.

[dstahl]

Thanks Slacker! I will give that a try tomorrow.