For LS/FS it does not matter, it will work. For HS, it depends on how you wire things up to the connectors. If you plan on also using standard cables, then it may be unstable. If the cable will be actual USB cable just terminated to a different connector, it will likely be fine. And absolutely no for anything USB3. Given that it is a keyboard, it will likely be FS. Answer from AlexTaradov on reddit.com
Amazon
amazon.com › 9-pin-usb-adapter › s
Amazon.com: 9 Pin To Usb Adapter
Explore a wide range of 9 pin to USB adapters. Find the right converter for your device compatibility requirements.
Specmeters
specmeters.com › USB-to-9-Pin-Serial-Adapter
USB to 9 Pin Serial Adapter
USB to 9 Pin Serial Adapter
The USB to 9 Pin Serial Adapter allows you to connect items with 9 pin serial connectors directly to your computer's USB port.
Price $73.50
Where do i find a 9 pin usb plug in my pc
Remember to check our discord where you can get faster responses! https://discord.gg/EBchq82 I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns. More on reddit.com
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August 20, 2024Laptop USB to 9-pin Serial Port Cable
Does anyone know what I need to make this cable work properly when trying to program radios? What I have is a brand new Dell computer, without serial ports of course, so I bought a USB to 9-pin cable adaptor (Dell sent me a Tripp Lite U209-000-R). I plug it into the cable (9-pin serial) and... More on forums.radioreference.com
5
September 27, 2005Any recommendations for a 9-pin joystick to USB adaptor?
I rewired the micro switches in an old 9-pin speedking through one of those zero-delay usb encoders. Zipsticks are small, so you would have to do it externally. Then again, you may not want to hack a perfectly good joystick up? More on reddit.com
17
5
April 10, 2020USB 2.0 case cable mismatch with motherboard
Sound like the cable from your H9 case is correct. The USB 2.0 header always has the bottom right most pin missing/blocked. Looking at the images for the your stealth x870, the headers on the back of the motherboard should have the bottom right pin missing. More on reddit.com
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April 13, 2026Videos
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Reddit
reddit.com › r/askelectronics › can a db9 connector be used as a usb connector
r/AskElectronics on Reddit: Can a DB9 connector be used as a usb connector
April 21, 2025 -
For a keyboard build iam looking at different connectors I like the look of an db9 connector. Can I use this instead of a usb connector. So the protocol will be usb, cable will also be usb. I'll snip the usb type a of and replace it with a db9 and do this on the keyboard side to. Will this matter For the signal?
Top answer 1 of 9
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Lmao why is everyone hating on this so hard. USB signals get sent over all sorts of non-standard connectors. As someone pointed out many industrial tooling use ruggedised locking connectors on the equipment that terminate with a USB A on the other. OP - yes this can “technically” work if you create a custom connector for your keyboard and recipient device. My only suggestion would be to fill all the unused pins with epoxy so the cable is somewhat keyed to your custom arrangement. Just reduces the chance it gets plugged into the wrong thing one day. But yes, this will work for a flippin keyboard. If it doesn’t - solder on a normal USB A. You had fun trying.
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For LS/FS it does not matter, it will work. For HS, it depends on how you wire things up to the connectors. If you plan on also using standard cables, then it may be unstable. If the cable will be actual USB cable just terminated to a different connector, it will likely be fine. And absolutely no for anything USB3. Given that it is a keyboard, it will likely be FS.
Lian Li
lian-li.com › 主頁 › product › 9-pin usb adapter
9-PIN USB adapter - LIAN LI is a Leading Provider of PC Cases | Computer Cases
Enables to connect additional 3 USB 2.0 devices to the motherboard via a Type A port.
Best Buy
bestbuy.com › site › searchpage.jsp
usb to serial 9 pin db9 cable adapter pc2fmac2fgps - Best Buy
Shop for usb to serial 9 pin db9 cable adapter pc2fmac2fgps at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up
Walmart
walmart.com › cell phones
9 Pin Serial Usb Cable
Shop for 9 Pin Serial Usb Cable at Walmart.com. Save money. Live better
Sabrent
sabrent.com › products › cb-9p6f
USB 2.0 To Serial DB9 Male (9 Pin) RS232 Cable Adapter – Sabrent
USB 2.0 To Serial DB9 Male (9 Pin) RS232 Cable Adapter
Provides the connection between USB and the traditional RS-232 serial port.
Supported OS: Windows 2000/ME/98SE, Windows XP (32/64-bit), Windows Vista (32/64-bit), Windows 7 (32/64-bit), Windows 8/8.1 (32/64-bit), Windows 10 and higher (32/64-bit), Mac OS X 10.6 and Above, Linux 2.4 or above.
Easy to setup: Plug & Play - Simply plug your device into the adapter and the adapter into your PC or Mac.
COM ports and Baud rates can be modified to desired set up.
This product comes with LIFETIME manufacturer warranty.
Price $11.99
Amazon
amazon.com › RS-232-Female-Adapter-Windows-Standard › dp › B08JZ5XZX6
Amazon.com: USB to RS-232 9Pin DB9 Female 9 Pin 2-RXD Serial Adapter Cable for Windows Linux Mac OS (Standard) : Electronics
DTECH 3 Feet USB to Serial Female Adapter Cable DB9 RS232 to USB 2.0 Cord with Prolific PL2303 Chip Windows 11 10 8 7 Mac Linux (9 Pin 2 Row Connector RS232C Protocol)
Reddit
reddit.com › r/pchelp › where do i find a 9 pin usb plug in my pc
r/pchelp on Reddit: Where do i find a 9 pin usb plug in my pc
August 20, 2024 - You probably need an internal usb 2.0 y splitter cable thing to split off that 9 pin thats connected to that smaller fan/rgb controller board on the bottom right
Eaton
tripplite.eaton.com › products catalog › usb adapters › u209000r
USB-A to Serial Adapter Cable - RS232, DB9, 5-ft. | Eaton
Connect a Serial Device to Your PC or Laptop This USB-to-Serial cable (M/M) connects a 9-pin RS-232 (DB9) serial device to a USB-A port on your desktop computer or laptop. It connects modems, PDUs, network switches, console servers and other ...
Amazon
amazon.com › Converter-Adapter-Connector-Compatible-Windows › dp › B083QWL13V
Amazon.com: USB Type C to RS232 DB9 Serial(9-Pin) Converter Adapter Cable 5ft with a Male to Female Connector, Compatible with MAC OS, Windows, Android, Linux Type C Device (USB C) : Electronics
Veeloon USB 2.0 to Serial Adapter (FTDI Chipset), 4 FT USB A to RS232 Male DB9 Pin Converter Serial Cable with Cable Ties for Windows 11, 10, 8.1, 8, 7, Vista, XP, 2000, Linux and Mac OS X, macOS
MODDIY
moddiy.com › products › 5123 › USB-2.0-Female-9-Pin-to-USB-2.0-Male-9-Pin-and-USB-3.0-19-Pin-Cable.html
USB 2.0 Female 9 Pin to USB 2.0 Male 9 Pin and USB 3.0 19 Pin Cable - MODDIY
USB 2.0 Female 9 Pin to USB 2.0 Male 9 Pin and USB 3.0 19 Pin Cable
Buy USB 2.0 Female 9 Pin to USB 2.0 Male 9 Pin and USB 3.0 19 Pin Cable for $14.99 with Free Shipping Worldwide (In Stock)
Price $14.99
eBay
ebay.com › electronics › computers/tablets & networking › computer cables & connectors › parallel, serial & ps/2
6FT RS232 DB9 9Pin Female to USB 2.0 A Male Serial Cable Adapter Converter Cord | eBay
6FT RS232 DB9 9Pin Female to USB 2.0 A Male Serial Cable Adapter Converter Cord
Explore the RS232 to USB 2.0 A Male Serial Cable Adapter. Connect your 9-pin devices to modern USB-A ports. Ideal for tech lovers!
Price $5.99
Walmart
walmart.com › electronics › laptops
USB to Serial Adapter
Shop for USB to Serial Adapter at Walmart.com. Save money. Live better
RadioReference.com
forums.radioreference.com › scanners, receivers and related equipment forums › general scanning discussion
Laptop USB to 9-pin Serial Port Cable | RadioReference.com Forums
September 27, 2005 - If that doesn't work (many adapters don't work on scanners with the default Windows driver), go to Tripplite's software page, find the "U209-000-R - USB to Serial Adapter" drivers - down near the bottom of the page, in the "Cable & Connectivity ...
ELECABLE
elecable.us › pages › usb-c-to-rs232-db9-serial9-pin-adapter-cable-drivers
USB to RS232 DB9 Serial(9-Pin) Adapter/Cable Drivers – ELECABLE
Windows 11 Driver：PL23XX_Prolific_DriverInstaller_v300 Support: Windows 11 ( 64-bit ) Windows 7-10 Driver：PL23XX_Prolific_DriverInstaller_v205 Support: Windows 7-10 macOS Driver：PL2303HXD_G_Mac Driver_v2.2.0_20220630.pkg Support: Mac OS Monterey (version 12.4) Mac OS Big Sur (version 11) - see NOTE#1 below.
Amazon
amazon.com › Header-Motherboard-Extender-Adapter-Converter › dp › B0B656PF9B
Amazon.com: XMSJSIY USB A to 9 Pin USB Header, 9 Pin Motherboard Male IDC Dupont to USB 2.0 Type A Male Cable Cord Extender Adapter Converter Cable - 20cm : Electronics
9 Pin Motherboard Male to USB 2.0 Type A Male Cable Cord, allows You To Connect Many USB Devices Originally Intended for Motherboard Headers To A Standard USB Port,It is suitable for data transmission of various computer peripheral products ...
Staples
staples.com › computer-accessories-peripherals › cables-cable-accessories › adapters-splitters › sabrent 6' usb 2.0 to 9-pin db-9 rs-232 serial adapter cable, black
Sabrent 6' USB 2.0 to 9-pin DB-9 RS-232 Serial Adapter Cable, Black | Staples
Sabrent 6' USB 2.0 to 9-pin DB-9 RS-232 Serial Adapter Cable, Black
Get Sabrent 6' USB 2.0 to 9-pin DB-9 RS-232 Serial Adapter Cable, Black fast at Staples. Free next-day delivery when you spend $35+.
Price $15.50
USBGear
usbgear.com › home › usb to serial › 2x serial usb
Dual Port DB-9 USB Serial Ultra MINI Adapter with Cable RS-232 X 2
MINI Portable USB to Serial Converter with RX/TX LED's. Item Uses FTDI FT2232C Chip. Turn any USB port into a Dual 9-pin male RS-232 serial port capable of speeds up to 920Kbps.