Tuner Pedals

I am not sure if its isolated, but for a lot of basic pedals like OD it works fine to daisy chain 1 off the polytune, I have done it with mine and had no ill effects.....

if you have run out of power supply outputs though I would posit that you use too many effects and need to play with less stuff for a little to see what you miss (if anything). Its easy to get carried away, but there's no rule that says you have to use every effect in your arsenal on your pedalboard, especially if you lack space or clean power for all that junk. If you drop some effects and find you cannot play without them then you need a 2nd pedal power and a larger board. You are The Edge, and rig design will be more critical to you than practice, so plan your board well and don't allow it to grow too organically lest you have power/layout issues again in future. If you don't miss them, then you are more like me and you can probably gauge down to a little gain/dirt boost and maybe some modulation or delay and be really happy getting most of your sounds with the guitar controls and amplifier(s).

EDIT:

I just looked at your equipboard and I am not sure how you ran out of power supply outputs, I see a tonebender (which should be run on a carbon zinc battery for ideal skronk, really, fuzz doesn't sound right run at its full 9 volts of designed power, we are used to hearing it run on 7 volts or less on 60s recordings because the carbon zinc batteries of the day were total junk that came from the store half dead already), a fet driver and a few other odds and sods like the Lehle for amp switching (good call, 2 amps is better than 1 and 3 is better still). You should be good. What are you using for DC and what's eating up all your power outlets? I would think a Voodoo Lab would do ya...

the battery you want is a 9 volt, but carbon zinc (which will never be a full 9 volts new, if its even 8 volts in the pack), check the dollar store.... back in the days of fuzz there was no such thing as alkaline batteries sporting close to their rated 9 volts new in the box, there was carbon zinc or carbon zinc. You'll find it takes a little harshness off your tonebender and gives it better compression at lower fuzz settings. Trust me, I ued to have a ridiculous vintage and boutique fuzz collection before their popularity exploded. Profits were too good not to sell and trade them off (got a whole 80s marshall tube amp for my FZ1 from Sam Ash a few years ago, lol)

that's a lot of effects to me.... I'm at 3 pedals, my poltune and a midi controller for them to change presets and control which amps get to which cabs and it seems needlessly complicated compared to my setup of the last decade which was guitar, polytune, ac30

you have too much stuff inline or you need a bigger pedalboard with 2 voodoo lab pedal powers.... and maybe a whole switching system like a GCX and ground control

this is a rather interesting little article on pedaloards from a David Gilmour idolizing pedal junkie....

http://www.gilmourish.com/?p=6704

I try to disseminate info on EB