Footswitch Design

[mnkey]

Hi,

I want to develop a tap-tempo footswitch which houses one switch with both the functionality of a Digitech FS3X "Up" switch (TRS) and two standard NO outputs. Can anyone with experience of Digitech-style footswitches advise me as to whether it is possible to have these two types of output on a single switch? Does one of the TRS lines carry a current which may cause problems with the pedals at the NO outputs?

Here is the schematic for the Digitech FS3X.
http://branchonmaybe.files.wordpress.com/2012/02/fs3x-wiring.jpg

I only desire to use the "Up" switch. Would I simply wire the Up switch with the two diodes as instructed and ignore the remaining switches, then wire additional NO outputs in parallel?

[Pushtone]

Hi mnkey, welcome to the forum.

But what's the FS3x controlling? A Jamman? If so...

I guess I would start by metering the tip and ring for voltage from the Jamman.
Then I would try triggering the UP by shorting the tip to ground (sleeve) with a paperclip. Might work, try it.

In theory yes I think you could parallel more normally open outputs using a tip/sleeve 1/4" jack.
If there is some source voltage from the Jamman a 0.47uf film blocking capacitor could filter DC before the NO output. Solder it right to the output jack.

But wouldn't such an arrangement, one switch for two functions, be a little funky to use?
Every time you set your tap tempo you will advance the loop three times, no?

Good luck!