Effects powering problem

[konradf13]

Hello,

I have some problems with powering my effects. Im using 9v power adapter with 4x9v outputs ( can power 4 effects at once). When i connect it to one DIY stombox and 1 or more original effects it works correctry. Also when i connect one DIY stompbox it works,  but when i try to connect multuple DIY effects everything don't work.

Please help me

[theehman]

Are any of your effects positive ground?  If you try to connect positive ground and negative ground effects on the same supply you won't get anywhere.

[konradf13]

all effects are negative ground

[petemoore]

 I have some problems with powering my effects. Im using 9v power adapter with 4x9v outputs ( can power 4 effects at once). When i connect it to one DIY stombox and 1 or more original effects it works correctry. Also when i connect one DIY stompbox it works,  but when i try to connect multuple DIY effects everything don't work.
  '4 x 9' means independant floating outputs or daisy chain?
  The first thing I'd think is possible and worry about is a direct short, and disconnecting at the PS end, plugging everything in as it would be used, then testing for short [also what DC resistance just for kicks].
  If it's not a short then...hard to say for sure...
  and maybe the current draw [digital effects can chow current ~pretty good] is exceeding what the PS can provide.
  That is all general, and I don't know what your power supply and effect PS wiring is like.
  The DMM in beep mode to check for shorts and also to check for continuities where applicable...
  Then used to see what kind of voltage drop there is when...
  and hesitate to recommend short term PS operating while testing for voltages and what makes the voltage drop [lift 'this' // test // lift "that" // test // etc.].