Bidirectional Current Port (Device powers accessory or Accessory charges device)

Other Hardware General Electronics
1

Hi!
I'm doing a project and I would want to have an accessory port, so I can both give current from the device's battery to the accesory (like a sensor) or charge the device's battery if connected to a charge base.

Never both at once, and I could do two ports, but I'd like to have only one port for charging or expansion.

2

That sounds like an interesting project that could be a lot of fun! However, please keep in mind that we are not a free design or code-writing service. We’re more than happy to help with your design or code, but we need you to make an initial attempt. Please design and write your code, then post it along with an explanation of what’s not working properly.

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3
  • Suggest you buy a ready made power bank, lots and lots to choose from on the internet.

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4

I'm designing the device to be small, self-powered and portable, and I didn't know if such a power system could be possible with simple electronics.

I'd be using a development kit by lilygo that manages battery charging and status, but would like to use a port like the described on my op instead of a qwiic connector to use accesories and the usb C to charge; but I'm only asking if, with simple electronics I can do the "I power you or you power me" system.

5

I'm trying to make a small, self-powered and portable device, therefore my curiosity if I could have only that one port to do both functions, with some electronics

6

You might want to study this first.
https://youtu.be/T70mBHeIOZA?si=XdswIxodQUt-axEV

7

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