New product: TTL232 - an RS-232 driver for those really old-school devices
Yes, they still exist...
Every once in a while I come across some device that actually talks real RS-232. This is a pain because it means I have to pull out an old USB to RS-232 cable.
Most electronics today expose UARTs (serial ports) at TTL levels of 3.3V or 5.0V. This is why the Nautilus USB UART features a switch allowing you to select between these two most common voltages.
Simple and versatile
I wanted something more versatile than a single-unit USB to RS-232 cable, so I went ahead and designed just the RS-232 to TTL part.
The male pins accept TX & RX from 3.3V up to 5.0V. Power is provided via the VIN pin. The NC pin (Not Connected) is there to match the interface from the Nautilus USB UART.
On the other side, a standard DB-9 male connector is provided for hooking up to a common serial cable.
By matching the interface to the Nautilus, this makes it easy to use in many scenarios.
Also, by breaking out the RS-232 I/O along with VIN and GND, simple wires can be used to hook up basically any device.
Need to go old-school? Get your TTL232 today!