I want to build a circuit that serves me as switch and must be powered from a phone via the USB port

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Juan Carlos De La Rosa

Joined Dec 5, 2015
1
I want to build a circuit that serves me as switch and must be powered from a phone via the USB port. I could use to accomplish this? it is economical, as it is for a project that I want to sell.
 

spinnaker

Joined Oct 29, 2009
7,835
Are you familiar with programming for the OS of your phone?

Are you familiar with programming MCUs?

That would be where you start.

IMHO. It might be easier and certainly more convenient if you used bluetooth. You can purchase plug in modules on eBay that interface to MCUs.
 
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