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Power is pulled down?

Hardware design
September 21, 2020 by Mohammed 1479

I bought a voice module. I found that the speaker had noise during debugging. When I connected the oscilloscope to watch the speaker, there was noise on the 5V power supply. It should be a power supply problem, but a DC power supply. How can I filter out such a situation where the voltage is pulled down?

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Skylar Veröffentlicht am September 21, 2020

Change the high frequency filter capacitor of the power supply part slightly, and try.

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Kennedy Veröffentlicht am September 21, 2020

Strengthen the power filter, especially the high-frequency capacitor value. The speaker will consume power, and the voltage provided by the power module cannot be pulled down. Under normal circumstances, there should be no voltage drop.

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Alice Veröffentlicht am September 21, 2020

The fluctuation of the DC power supply used for power supply is a bit big.

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