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Questions relating to the Raspberry Pi USB ports and specific Raspberry Pi USB devices and device interaction.
6
votes
What Analog to Digital Converters Are Available For RPI?
The MCP3008 seems to be one of the more popular ADC's for the RasPi and it uses the SPI interface for communications
If you want to attach an Arduino via USB and read out its ADC's check this posting: …
7
votes
Accepted
Raspberry Pi 4 - Booting with 3 USB attached Harddrives causes Crashing
I'm assuming these are USB drives, and are powered from the Pi USB port(s).
You're probably exceeding the power supply capacity of the Pi and/or the power supply. … The only way you're going to get this to work is to use a powered USB hub. …