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how to avoid ground loop when use one powersupply for multi guitar pedal? Answered

Hello .
I going to buid a guitar pedal witch have 2 boards in a box and use a power supply to power both of them.But i dont know how to wire them to avoid groound loop problem.Normal i will do like the picture below .Do i need to cut any wire to avoid the noise ??
Thanks for advance!

sorry for may bad English!

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steveastrouk
steveastrouk

Best Answer 9 years ago

How far apart are the units ?

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login721
login721

Answer 9 years ago

very close , around 2cm

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steveastrouk
steveastrouk

Answer 9 years ago

Bring all the 0V lines to one point on the case then ground that point. Note the difference between "ground" and 0V

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login721
login721

Answer 9 years ago

Thanks, i will try it .

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mpilchfamily
mpilchfamily

9 years ago

To help pad the 2 boards so a ground loop won't be created you could use a 600:600 ohm transformer. This allows the signal to pass from one board to the other without the grounds physically touching and creating the ground loop.