![]() Two 256 Gb SD cards in the USB slots are used to store the music files (but you could use one 512 Gb SD card as well).Īlso it is possible to use one big internal SD card.Īlthough it didn't happen to me, SD cards can get corrupt when the power is disconnected. In this way it is easy to make a backup of the OS partition.Ĭurrently, I use a small (16Gb) high quality SD card for the OS and applications only. Probably it is wise to make two partitions. SSD drives are much faster, more reliable when powering off and have a longer lifetime.īooting from SSD is supported by Raspberry Pi models 3B and 4. Probably the best and cheapest way is to use an USB SSD drive. The capacitor might become too hot and start leaking and thus damaging the print. The two capacitors of 4700 uF are placed in parallel after the resistor and connected to ground.Ĭheck that the electrotrolytic capacitors are mounted with the right polarity!ĭo not place the capacitor at the right hand side above de DAC chip! The ceramic capacitor is connected between the connection of inductor and resistor and ground. The inductor and resistor are placed in series and replace R14. ![]() The filter consists of an inductor two ceramic capacitors, a resistor of 22 Ohm and two capacitors of 4700 uF/10V (Conrad art.number 422027). So adding a passive filter before the voltage regulator assures that the noise from the Raspberry doesn't reach the DAC.Īdding this filter improved the audio quality a lot! I cannot tell the difference with the high-end DAC anymore!įirst you have to remove R14 (0 Ohm) SMD resistor. I think the reason for this is the noisy power supply of the Raspberry Pi.Īlthough the board has a buit-in voltage regulator, this does not work well for high frequency noise that comes from the power supply. Unfortunately, the difference was rather big: the stereo image was not very detailed and it sounded a bit dull. ![]()
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