Can a single SPDT momentary switch on 4 effects?

[sjaltenb]

hey ya'll i have 4 Dano effects that are going in my cornish board and after several unsuccessful attemps at making them "always on"... i have decided i'll just have a switch that will turn them on. My question is, if they all use the same type SPDT momentary switch, can i just wire them all together and have a single switch turn their power on? I dont see why not i just want to make sure before I place my order with SmallBear

Thanks

[QSQCaito]

One switch for all??

First of all, depends on what you want. If it's a chain of effects, certainly not. At least not by connecting all inputs to and outputs to the SPDT, that would split the signal in for, and then get all mixed again if I'm not wrong. SPDT are not good to by pass neither, you'll probably get a loss of tone, that's why most people use DPDT. It avoids tone suck.

You could certainly do it with one SPDT, but it will take more effort. Taking of true bypass always, you could take a look at the article about bypassing with relays at GEOFEX(.com). That way you could have the switch as far from the stompboxes as you want, an would send +12v to a point in the bypassing circuit, or a connection to ground. You can do it with for at a time.

Hope it helps.. gotta think something better and i'll be back(terminator)

DAC



EDIT:

Lets explain a bit why it won't certainly work as I believe you wished to do it.


First of all, I believe you have a chain, your effects are in order. With a SPDT all effects will be connected together like in a mixer, probably resulting in a sound you don't like much. Then, as your signal is splitted into 4 effects, each effect will receive a weak signal(1/4 of it.. maybe one more than the other) so you will have to put a quite good input buffer. Also when bypassed (middle with right connection) you will lose lots of tone, your signal instead of going to amp, will go to the effects output.. and there are 4 effects willing to eat your signal, boahaha. Better to forget it, and look ways(if you want to do it with one stomp) as relays.

[sjaltenb]

ahhh I am sorry I should have explain what I am doing.

I am building a very large Pete Cornish style board that basically has a huge true bypass strip on the front edge with ~14 3PDT true bypass switches that will control the actual signal flow.

Since all the circuit boards are going into the box I am having to figure out ways to keep the circuits on all the time, which is easy for say a BYOC effect which is always on and by nature already true bypass.

What I am doing is just wanting to know if my 3 Dano EQ units, one of which will be in a loop with a Big Muff, and the other 2 in their own loop at the end of the chain, can be Powered on by using a single momentary switch, instead of the individual ones that are on their circuit boards. I tried several suggetions about rigging these effects to stay on indefinitely but they did not work out, so Plan B

Hope this helps explain my question.

Heres a pic so far, just for fun! I got a long ways to go, but its made a lot of progress since that last pic.

[QSQCaito]

Ok, power up three effects. With true by-pass.

TO ME the easiest way would be relays. You want, with one stomp to tun on 3 EQ, which don't relate one another.

Lets take a look at this:
http://www.geofex.com/Article_Folders/rmtswtch/rmtsw.htm

I would suggest taking a deep read to the article, it's very good in my opinion.

You'd probably end up doing this circuit:


To the +On/-Off you have to send +12V, or ground. You put in one SPDT, in the middle the +On/-Off of 3 of this circuits, and on left(or right) negative, and on right(or left) positive.

Voila, hope it helped.

Bye bye

DAC

[petemoore]

  I'd have to figure out...but I don't think any side of those switches go to ground.
  If they all went to ground on one side, that'd be cool, you could probably switch them all on at the same time..which'd be quite useful!
  Because you could have one side of a main switch to ground, then however many taps you use going to the effects through their own switches, you could set up different combinations of effects to be BP'd or used at the tap of one switch.
  If there's no ground on one side, then perhaps one side [of a 'main sw.]could be made to operate several Jfet switches at once...but I kind of doubt it or we'd be seeing that.
  Maybe not so doubtful, as typing brings thoughts..those effects have 2 jfet switches each, coming from 1 switch that goes...wherever the other side momentarily contacts.
  I would try to type better about this but I'm can't sort the jfet bypasses out of typical boss or dano schematics very well.
  If so, you could just run a 1 connector wire from each pedal to the switch, + one wire from where the momentary contact contacts, easily un-doable and unintrusively, each existing momentary sw could be left in place and would still function, handy also.
   Someone else may chime in here, sounds too good to not already be true, -non true bypass bliss.

[ambulancevoice]

wait, do you want to switch each pedals power on at once, or do you want to turn each pedals actual effect on?