Simultaneous relay switching ?

[10thTx]

Anyone have a schematic drawing of how to switch two DPDT relays with ONE footswitch (in contrast to one foot switch box with two footswitches in it).

In other words, one switch will operate two relay DPDT's simultaneously.

I have some ideas on this but thought maybe someone has done this before?

With respect, 10thtx

[Colossal]

Hey 10thTX,

Wouldn't you just be linking your path to ground on the relay boards such that both circuits trigger by the completion of the one common path to ground?

So for instance, on the relay boards Ampdoc and more recently I offer(ed), the DPDT relay is thrown by completing the path to ground via the on-board indicator LED. You could simply link those paths to ground so that 1 to n number of relays are firing when you click the footswitch.

Am I overlooking something in your question?

Check out the document I wrote, specifically pages 6 and 7.
https://dl.dropbox.com/u/7561678/Boards ... ctions.pdf

You can see how the relay is triggered by either one SPST panel mount on-off switch or by a SPST footswitch. I think all you have to do is daisy chain the grounds together with the one footswitch closing the loop.

Regards,
Dave

[10thTx]

Colossal,

Hey thanks for the information! It is appreciated.

With respect, 10thtx

[ER]

Depending on what you're switching you may just want to put the foot switches next to each other on the pedal so you can "stomp" one switch or two at a time. Otherwise I'd just use a DPDT foot switch to put each relay to ground.

F'rinstance, I put my PAB and HRM-PAB on either side of the OD switch and spaced them so I can engage one or two switches at a time. This way I can go from;

Clean to OD+HRM stack (don't use this very often)
Clean to OD-HRM stack
Clean+PAB to OD+HRM stack
Clean+PAB to OD-HRM stack

..all depending on how I step on the switches, the HRM can be lifted while on the clean channel before switching to overdrive.

[mlp-mx6]

Colossal is exactly correct. All you have to do is tie the grounds together for however many relays you want to switch together. For instance, I have the bright switch tied into a relay that switches with the OD relay. The bright can either be ON, OFF, or ON for clean/off for OD. All I did was tie the ground connections together.