You often need an RS-232-to-TTL adapter for debugging or testing UARTs using a computer. But most of these adapters require an external power-supply adapter to power up the RS-232 transceiver. This ...
[Felipe Navarro] wanted to add a few serial ports to his computer, but couldn’t find an adapter that suited his needs. So, he built his own. His Quad Serial device is a nicely designed converter that ...
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