How or where to add power supply for 2 effects or more -dragonfly pic

[jimbob]

How or where would you  add power supply for 2 effects or more based on this from Dragonfly
http://aronnelson.com/gallery/The-Mod-Zone-%21/WIRING_2_FX_IN_1_BOX

Btw- great mods Dragonfly! I really like the way you made it easy for anyone to understand it with the pics.

Anyways, Im thinking about  making a few projects in one case (rangemaster and a booster for example) and  I was wondering how to wire them so they both get power.

[calpolyengineer]

If you are using external power, you can use one power jack and wire both effects in parallel. You have to make sure that the power supply can handle the current draw of both effects, and both effects must be either pos or neg ground (careful with the rangemaster, there's different versions: PNP is pos ground, NPN is neg; most other effects are neg).

If you are using batteries I would recommend that each effect have its own battery, in which case you would wire it just as you normally would.

-Joe

[jimbob]

That makes sense. I would do probably a Tube screamer and an amz booster. How do you know how much power it needs? Maybe 18v since they individually run on a 9v battery?

[calpolyengineer]

Whoa, no. There is a very important and distinct difference between power and voltage. Each of those pedals (if I'm not mistaken) are negative ground and 9V. They each need 9V so ALL you need is 9V. You put the positive lug of the power jack to the +9V on both effects, and the ground to the ground on both effects. It is the current that you have to add together. There is a thread or chart somewhere here that has a list of most effect's current draw. If you/I/anyone else can't find it, all you have to do is breadboard one of the circuits and power it up with a multimeter set to DC current in between the + on a 9V battery and the +9V on the effect. Make sure to play some guitar through the effect while testing and get a reading off of the mulitmeter. This is the current draw for one effect, now do it for the other and add those both together. When you look at the power supply it should tell you the voltage (9V) and the current (XXX mA). The current rating on the power supply just needs to be greater than the total current draw of your effects.

-Joe

[calpolyengineer]

OK, save yourself some hassle, here is the link http://www.cioks.com/assets/CURRENT%20CONSUMPTION%20TABLE.pdf

Thanks to puretube

-Joe

[jimbob]

Thanks. Ill give that a try when I finish.

[Dragonfly]

its really not too tough...

things like delays, flangers, etc draw more "milliamps" of power than someting like a booster or a distortion would....


so....

lets say you're packaging a amz mosfet boost and a fuzz face in the same box and would like to share a single power supply...something like a 9v 200milliamp supply would be fine (provided youre not doing a 18v mod to the mosfet boost) ....BUT...if you are looking to do a pt80 delay and a mxr flanger clone inthe same box, you'll need a bit heavier duty supply...something like a 9v 1000 milliamp (1amp) supply should work ok...

so...battery hooks up to the power jack like normal...then run parallel wires to each circuit board...also, if youre using 2 led's, you'll want to use seperate resistors for each...

hope this helps,
  AC

[jimbob]

makes sense enough. I cant wait to give it a try as Im running out of enclosures.