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Hello Fedi, perhaps you can help me with a #USB #TTL #FTDI question:
I have two of these devices: https://www.aliexpress.com/item/1005006150051861.html#nav-specification: The red USB-C version, and the blue mini-USB version. The red version has a pair of jumpers to control whether it outputs 3.3v or 5v, and this seems to work fine.
The blue version has a switch for the same purpose, but doesn't change the output voltage (whose pin is clearly labelled 5V rather than VCC). Is there another pin I'm missing that should be outputting 3.3vV