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high voltages on usb to TTY UART? (lemmy.one)

submitted 1 month ago* (last edited 1 month ago) by [email protected] to c/[email protected]

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Hi, Any1 have experience with this usb to TTL 6 pin converters? I just want to know if I have a dodgy one that I bought from Ali or normal behaviour.

Doesnt seem right. I have it plugged to a powerbank, following voltages read from pinout, without any jumper link.

5v = 5.3 Vcc = 3.9v 3.3 = 3.2v Tx RX = 3.9v

If I use jumper link from 5v to VCC, then tx RX = 5.3v, if I jumper link VCC and 3.3, RX and tx = 3.9v.

Thanks for reading

Photo of product http://0x0.st/81fc.jpg

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[–] [email protected] 1 points 1 month ago

"On certain 3.3 V devices, any voltages above 3.6 V will cause permanent damage to the chip. " Well thats not good. I guess I have my answer 3.9v is high 🤷