using relays?

[axr]

i was thinking if i can use relays instead of 3pdt switches?
i can get a 12v 5a relay that works like a 4pdt in my local shop, what you think guys?
but my main ? is if i use that relay will i get the annoying popping sound that sometimes carry some dpdt's? (i will run the pedals at 11-12v)

thanks in advance

[Mike Burgundy]

if you're running on adapterpower, sure you can use relays. Actually, on batteries as well, but the relays'll eat them like cookies.
Just make sure you parallel the coil with a reversed diode. I think GEO has some nice simple but trouble-free switching logic up somewhere.
The pops in switches are almost always caused by one of two things: DC offset or dirty/bad contacts.
The first can be prevented by using coupling caps and high-value resistors to ground to ensure the switched path resides at 0V.
The latter is cured by replacing the switch or cleaning the contacts. Most footswitches are made for high-voltage applications - the contacts don't need to be all that great: the higher voltage will burn across any small imerfection. Guitar-level signal however doesn't pack that punch and suffers from contacts that aren't perfect.
Relays can be found with gold or silver-plated contacts - these are perfect. Your find probably works perfectly as well.
One thing: if the contaqcts "bounce" (meaning ON/OFF/ON/OFF really quick) that'll sound like some sort of pop as well. A bit of switching logic cures this, but it may very well work okay without.
A cheaper way might be switching with FETs or MOSFETS. Just an idea

[Aharon]

I found a simple schem for relay switching,built it and works fine.I must say I left the project to do other  stuff and I haven't connected a signal to it yet but the relay switches remotely.I need a  LED to show status and I haven't been lucky yet .
The designer swears it's silent

Look here first on the schem list




http://www.vanhelden.demon.nl/gear/schema.htm#custom


if anybody has an idea on how to implement a LED here I'll appreciate it.
Hope it helps
Aharon

[R.G.]

There are several variations on how to build cheap, low power, silent, reliable footswitching, both local and remote, at GEO - http://www.geofex.com.