Hello
Some questions about your project:
1. How many signal lines in one port:
- All 9 lines (DTR, DSR, RxD, TxD, CTS, RTS, DCD, RI, GND)
- Only three lines (RxD, TxD and GND)
2. What is maximal baudrate?
3. Preferred supply voltage of device (24, 12 or 5 V)?
4. A method of commutation control: USB/COM-port, binary input (4 bit) or other?
5. The required size or form factor device/pcb?
6. Type of connectors?
7. What you want get as final deliverables for this project?
- Schematic diagram
- Bill of materials
- Traced PCB Gerber files
- Assembling and demonstration of working prototype
8. How urgently you need it?
Write me for discuss details, costs and deadlines if you are interested
With best regards,
Tim