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dhhagan / py-opc

Python wrapper for the Alphasense OPC-N2 built around py-spidev
MIT License
30 stars 26 forks source link

Clarifying power needs from RPi #87

Open dhhagan opened 11 months ago

dhhagan commented 11 months ago

Hi @dhhagan,

Thanks for developing this wonderful library. I need to clarify something from the documentation. It will be of a great help if you could help me with this.

I was reading documentation on "https://py-opc.readthedocs.io/en/latest/". The section "Connecting via GPIO" mentions "The OPC requires at least 250 mA, so powering directly through the RPi is not an option". Please explain me this as I do not have much knowledge of electronics.

Can't RPi provide this current? If not, please give me an idea of how to connect both RPi and OPC-N3 with the same power supply. Can both the device be powered using mobile charging adapter?

Thanks for your time! Waiting for your response...

Originally posted by @yash-dahima in https://github.com/dhhagan/py-opc/issues/75#issuecomment-1727090674

dhhagan commented 11 months ago

Hi @yash-dahima

Opened a new ticket for this since it's a separate question. The Raspberry Pi cannot provide that much current from GPIO pin, so you will need to use a different power supply that can provide that much current. You can use a single power supply and split the power between the RPi and OPC. It's a bit hard without knowing more about your current setup.