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need help with using one power supply to power multi guitar pedal? Answered

Hello .
i have two DIY guitar pedal , they work normal in a chain and each of them use they own power supply( 9v AC-DC adapter).Now i want to use one power supply to power both of them.So , i wire them like the picture bellow, and i get the 60hz noise.
Can you please tell me how to get rid of that noise.
Thanks in advance !
sorry for my bad English.

http://i247.photobucket.com/albums/gg132/chipmapple/noisepw.png

2 Replies

user
steveastroukBest Answer (author)2012-03-30

Try disconnecting the ground line between the two boards.

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user
iceng (author)2012-03-30

Or the two PCBs together overload the small adapter causing supply ripple.

A

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