I am currently working on a school project to make the wireless charging platform from scratch but with more surface for originality. My current design requires 42 transmitter coils and these coils will be transferring power via induction/ resonant coupling. Furthermore, these coils will be sending analog ping to detect receiver coils and will be receiving analog pings from receiver coils.

I am currently thinking of using raspberry pi 4B as I got one for free from my college. However, I've never used it before and reading the data sheet made me a bit confused on which pins to use and how many pins I could use.

For now, my plan to connect the 42 transmitter coils by using a matrix? This seemed to be the popular method of cramming a large number of IOs on the PI or other micro-processors/controllers for digital IOs but I am not sure if they work for analog IOs.

Furthermore, typical resonant coupling happens at 100khz. Can the PI output such frequency? I believe the power requirements for the transmitter coils are within the ranges of the PI.

If anyone worked with a large number of analog inputs for Raspberry PI please share some tips!


  • Why 42? This is the Meaning of Life the Universe and Everything.
    – Milliways
    Dec 7, 2023 at 21:42
  • what's 6 times 9 :p Dec 8, 2023 at 1:33


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