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I've purchased a Pigear Nano, and when it is being powered from the universal 2-pin power connector, there is an audible high pitch noise coming from the device. It is very distracting and you can hear it from several meters away. I bought it for a commercial project, and I am worried about the reliability, and the noise is annoying. It doesn't seem to emit the noise from the USB-C power input.
Does anyone else have this issue?
Posted : 11/08/2023 7:53 pm
Such kind of noise are usurally from the inductor in the DC/DC converter, which converts higher voltage (from the universal power connector) to 5V.
DC/DC converter usually works at a frequency that is higher than the range human can hear, but some DC/DC converter may lower the frequency when the load is rather light, to increase efficiency and reduce energy consumption, and as a result its working frequency may drop into the range that human can hear. The DC/DC converter (SY8204) on PiGear Nano belongs to this category, and you may hear it when the system load is rather light.
This kind of noise is quite common in circuit boards that has build-in DC/DC converter, and it has nothing to do with the system reliablility.
Putting the device into a case may reduce this kind of noise.
Posted : 14/08/2023 4:48 pm