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*shielding audio from PWM.
hello : )
i have a pwm signal that runs quite near an audio circuit board. the emi noise from the pwm jumps across to the audio circuit, which isn't great at times.
i am routing the pwm cable as far away as possible, but I need more shielding. Would it be worth purchasing a roll of copper tape to wrap up the pwm cable and then heat shrink over that again? Or would it be best to use a twisted pair and perhaps wrap copper tape over that too? The pwm signal is from a h bridge , so the polarity flips back and forth. I wonder, would i need to attach ground/earth to the copper tape/foil that surrounds the pwm wires ,to help with the shielding? or does it not really matter as long as there is metal between the wires and circuits?
thanks for any suggestions. : )
*shielding audio from PWM.
hello : )
i have a pwm signal that runs quite near an audio circuit board. the emi noise from the pwm jumps across to the audio circuit, which isn't great at times.
i am routing the pwm cable as far away as possible, but I need more shielding. Would it be worth purchasing a roll of copper tape to wrap up the pwm cable and then heat shrink over that again? Or would it be best to use a twisted pair and perhaps wrap copper tape over that too? The pwm signal is from a h bridge , so the polarity flips back and forth. I wonder, would i need to attach ground/earth to the copper tape/foil that surrounds the pwm wires ,to help with the shielding? or does it not really matter as long as there is metal between the wires and circuits?
thanks for any suggestions. : )
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