Momentary Footswitch NO/NC simultaneously

Started by jw289, August 05, 2013, 03:17:00 PM

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jw289

So I'm pretty new to electronics and diy-ing in general. I've built several pedals from kits and just recently modified my TC Nova Repeater with an external foot switch jack. So now I have a problem I didn't realize I was going to have:

My TC Repeater is a NO circuit, and my Boss DD7 is a NC circuit (excuse me if my terminology isn't correct)

So, if I understand correctly, a DPDT momentary foot switch has terminals for both NO and NC, yes? What I want to do is build a small foot switch with two outputs, one for the NO pedal, and one for the NC pedal, so that they can both be tapped in time with the single switch. (I currently have a Boss FS-5U which has a polarity switch to change NO/NC, but because my stroke can't be instantaneous, the tempo on my pedals doesn't sync up in either config)

Is this possible? How would I go about wiring that up? Am I really this much of a noob?

Please help!

midwayfair

Quote from: jw289 on August 05, 2013, 03:17:00 PM
Is this possible? How would I go about wiring that up? Am I really this much of a noob?

lugs:
1  4
2  5
3  6

On for NO = 1 (tip) & 2 (sleeve)
On for NC = 6 (tip) & 5 (sleeve)

Use your multimeter to determine which lugs are connected when the switch is thrown (beep).
My band, Midway Fair: www.midwayfair.org. Myself's music and things I make: www.jonpattonmusic.com. DIY pedal demos: www.youtube.com/jonspatton. PCBs of my Bearhug Compressor and Cardinal Harmonic Tremolo are available from http://www.1776effects.com!

jw289

#2
Thank you! This is just the resource i needed. So this config will close the NO lug and open the NC lug at the same time? I'm assuming the "throw" is the engaging of the switch. Yeah, I know, I'm stupid.

And are lugs 3 and 4 for power and ground? (I know I don't need power, I'm just curious)

aion

Nope, you would leave 3 and 4 unconnected. The DPDT momentary (X-wing style) has two poles, one on each side of the switch, and each pole can be wired to be either normally closed or normally open. There are also situations where you might want to reroute the whole signal momentarily, so it's conceivable that you might use all of the lugs at once in some applications, but for tap tempo purposes you'll only ever use 2 of the 3 lugs on either side.