9-pin serial port - Electronic Circuits Projects Diagrams Free

CloudedVision · 15th November 2008, 11:04 PM

I am making a project with a microcontroller that interfaces to the computer via a 9-pin serial cable. Can I get a 9-pin serial port that attaches to a solderless breadboard anywhere?

gramo · 15th November 2008, 11:09 PM

Surely can,

You dont need the majority of the pins if your only using the connector for UART

Pin 2 - RX data for PC
Pin 3 - TX data from PC
Pin 5 - Common Earth

gramo · 15th November 2008, 11:12 PM

Forgot to mention that you can get them from Futurlec

D-Subminiature Connectors

~$0.52

CloudedVision · 15th November 2008, 11:44 PM

Thanks gramo. That's exactly what I needed.

CloudedVision · 15th November 2008, 11:53 PM

Wait, another question. You were right, I only needed pins 1-5, but the manual of my microcontroller says I need to directly connect pin 6 (DSR) to pin 7 (RTS) Do I need to do this? If I do, the parts from futurlec look like it only includes pins 1-5, so that won't work.

gramo · 16th November 2008, 12:02 AM

Quote:

Originally Posted by CloudedVision

the parts from futurlec look like it only includes pins 1-5, so that won't work.

The PCB adapters from Futurlec do include all 9 pins, the angle of the photo is bad.

Quote:

Originally Posted by CloudedVision

the manual of my microcontroller says I need to directly connect pin 6 (DSR) to pin 7 (RTS) Do I need to do this?

Depending on the application (and the programming involved), generally you don't require the other pins.. Consider this project I did a while ago: Spency's digital-diy 16F PIC micro Tutorial - DS275

CloudedVision · 16th November 2008, 12:14 AM

thanks for clearing that up gramo

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15th November 2008, 11:04 PM	#1 (permalink)
CloudedVision	9-pin serial port I am making a project with a microcontroller that interfaces to the computer via a 9-pin serial cable. Can I get a 9-pin serial port that attaches to a solderless breadboard anywhere?

15th November 2008, 11:09 PM	#2 (permalink)
gramo	Surely can, You dont need the majority of the pins if your only using the connector for UART Pin 2 - RX data for PC Pin 3 - TX data from PC Pin 5 - Common Earth __________________ digital-diy.com - Hobby microcontroller projects and tutorials. Assembly, PICBasic and C examples. Last edited by gramo; 15th November 2008 at 11:10 PM.

15th November 2008, 11:12 PM	#3 (permalink)
gramo	Forgot to mention that you can get them from Futurlec D-Subminiature Connectors ~$0.52 __________________ digital-diy.com - Hobby microcontroller projects and tutorials. Assembly, PICBasic and C examples.

15th November 2008, 11:44 PM	#4 (permalink)
CloudedVision	Thanks gramo. That's exactly what I needed.

15th November 2008, 11:53 PM	#5 (permalink)
CloudedVision	Wait, another question. You were right, I only needed pins 1-5, but the manual of my microcontroller says I need to directly connect pin 6 (DSR) to pin 7 (RTS) Do I need to do this? If I do, the parts from futurlec look like it only includes pins 1-5, so that won't work.

16th November 2008, 12:14 AM	#7 (permalink)
CloudedVision	thanks for clearing that up gramo