USB to Quad Serial Port Adapter Offers TTL, Isolated Ports
[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 offers four serial ports, two of which are isolated to avoid blowing up too much stuff if things go wrong. The other two are TTL ports, but with an interesting twist: feed them any voltage between 1.8 V and 5 V, and they will happily work with it, which is a lot easier than messing about with TTL to RS-232 converters.
It’s all built …read more
Continue reading USB to Quad Serial Port Adapter Offers TTL, Isolated Ports