series wiring for DC plugs...

[jkokura]

I'm trying to create custom power cords to run from my PP2 to my pedals. I'm tired of being able to only power 8 pedals and I want to run several pedals off of one output from the supply (ala 1 spot, or the Boss TU2 function). I've gotten as far as knowing I need to hook up the plugs in series, not in parallel, but I'm having trouble trying to understand the wiring at the jacks.

I know that the centre of the cable goes to Tip and the sheild goes to sleeve at the supply end, and if you were to make the cable supply only one pedal you would replicate this at the other end, but how do I solder in the second cable at the pedal end to extend it to another pedal (and a third, and a fourth maybe)? Does the + supply go to tip and the - go to sleeve, then the extension ties in directly to the same lugs (+ to tip and - to sleeve)? or does it connect some other way?

Help me if you can please, much appreciated.

Jacob

[Processaurus]

No, you want the new plugs all hooked in parallel.  Tip to tip, barrel to barrel.

Note each output is rated for only 100mA, except for the "L6" outputs, 200mA.  I'd run the daisy chain off of one of those, if possible.

[darron]

I agree with Processaurus. You do want to run them in parallel rather than series. This is what the daisy chain cables do that people use with 1spots, boss etc. I suppose the daisy chain does look a lot like it is a bunch of series connections like Christmas tree lights. the idea behind it is that if you run effects (or anything) in series then they will all share the same voltage and divide it between them. for example if 3 pedals all drew the same amount of current and you fead them 9v in series they would all get 3v each. if you run the effects all ini parallel as though they were all connected directly to the power supply, then they will all see the same 9v as long as the power supply can handle the current draw.



100mV is a bit of available current to play with, but far from enough to run a whole board. lots of pedals consume very little, around 10mV. the high consumption boutique builds with bright leds can go up to around 50mV.

in my opinion, you can often have one power supply for a whole pedal board with no noise problems, assuming the power supply can provide enough current, like the 1000mV+ ones. this won't always be the case though. for example, some digital pedals put noise on the line. some pedals put noise on the power line when they are in bypass and you wouldn't normally hear it. some pedals oscillate with bad combinations. lots of pedals don't have any/sufficient power filtering and assume a perfect or battery power source. spread your pedals around and look for good combinations if you have problems.



sorry for typing too much. darron sleepy.

[JKowalski]

100mA is a bit of available current to play with, but far from enough to run a whole board. lots of pedals consume very little, around 10mA. the high consumption boutique builds with bright leds can go up to around 50mA.

in my opinion, you can often have one power supply for a whole pedal board with no noise problems, assuming the power supply can provide enough current, like the 1000mA+ ones. this won't always be the case though. for example, some digital pedals put noise on the line. some pedals put noise on the power line when they are in bypass and you wouldn't normally hear it. some pedals oscillate with bad combinations. lots of pedals don't have any/sufficient power filtering and assume a perfect or battery power source. spread your pedals around and look for good combinations if you have problems.

I can tell you are sleepy!

[jkokura]

Alrighty then, I was misinformed. I do plan on running a couple chains of the of the 250mA outputs on the PP2, and from what you guys are saying is that I need to run them in parralel.

So how would I wire that? Assume tip is positive and sleeve is -, and the wire I have has a centre lead and a sheild.

Jacob

[R.G.]

So how would I wire that? Assume tip is positive and sleeve is -, and the wire I have has a centre lead and a sheild.

No, the standard for the "industry" was set by Boss insisting on center negative. The barrel is positive.

By the way, there are a number of companies that make pre-made, ready to go, polarity-correct daisy chain cables. They aren't that expensive (probably comparable to buying parts).

[jkokura]

So how would I wire that? Assume tip is positive and sleeve is -, and the wire I have has a centre lead and a sheild.

No, the standard for the "industry" was set by Boss insisting on center negative. The barrel is positive.

By the way, there are a number of companies that make pre-made, ready to go, polarity-correct daisy chain cables. They aren't that expensive (probably comparable to buying parts).

I already have the parts RG... otherwise you're right. I know you can help my dense head get this - any hope for a diagram? I'm trying to wrap my head around this - so the shield goes to the tip, the lead goes to the barrel for the first one, then how do I connect in the next plug to the first - shield goes to the same tip, and lead goes to the same barrel? Is it that simple?

Jacob

[aron]

The positive goes to barrel as R.G. said. Negative is the tip.

Wire the rest like previously mentioned:

you want the new plugs all hooked in parallel.  Tip to tip, barrel to barrel.

Or spend a small sum and use the One Spot daisy chain wire pack - sold for way cheaper than buying plugs and wiring them. (About $10)

http://www.sweetwater.com/store/detail/1SpotMC5

[jkokura]

I wish I had seen that before I got the parts. But I'm also in Canada, and stuff is harder to find for that kind of price. One benefit to doing it this way is to have custom length cables, which is great for my pedal board which seems to have a rats nest of coiled power cables underneath.

Tip to Tip, Barrel to barrel.

Thanks for the help.

Jacob