hi!
i'm a newbie and i'm having some trouble with my design...
there's too much buzz, absolutely not tolerable.
in the thumbnail is my setting
the raspberry and the mux share the same power supply.
if i feed the mux with a separate power supply (battery or phone charger) everything is ok, there's no noise anymore but it is alway on!!! (this was expected)
i tried with a second "bridge rectifier+ldo" on top of the mux, sharing the secondary output from the toroidal meant to work for the raspberry, but it's the same buzz
i think only a relay can save me
do you want to help me?
thank you
i'm a newbie and i'm having some trouble with my design...
there's too much buzz, absolutely not tolerable.
in the thumbnail is my setting
the raspberry and the mux share the same power supply.
if i feed the mux with a separate power supply (battery or phone charger) everything is ok, there's no noise anymore but it is alway on!!! (this was expected)
i tried with a second "bridge rectifier+ldo" on top of the mux, sharing the secondary output from the toroidal meant to work for the raspberry, but it's the same buzz
i think only a relay can save me
do you want to help me?
thank you
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Do you have any smoothing on the power supplies?
Any large value electrolytic capacitors?
Your block diagram gives no detail.
Any large value electrolytic capacitors?
Your block diagram gives no detail.