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.
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
Can a DB9 connector be used as a usb connector
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. More on reddit.com
Can you recommend a 9 pin to USB controller adapter
https://www.raphnet-tech.com/products.php?category=genesis https://www.retrousb.com/index.php?cPath=21 More on reddit.com
ISO a high-quality USB-C female to Micro-USB male adapter
Just buy a cheap one. They are just two resistors and 4 wires. Not a lot to fail More on reddit.com
USB to 9-Pin Serial Port
That won’t work. USB-to-serial exists because USB devices can be just about anything, and drivers are built into the OS for common devices like serial adapters, floppy drives, etc. Serial-to-USB would require active conversion, with the knowledge of what you are plugging in. You’d need drivers that know how to talk to a floppy drive plugged in that way. More on reddit.com
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
MODDIY
moddiy.com › products › 2506 › USB-A-to-9-Pin-USB-Motherboard-Header-Adapter-Converter-Cable.html
USB A to 9 Pin USB Motherboard Header Adapter Converter Cable - MODDIY
USB A to 9 Pin USB Motherboard Header Adapter Converter Cable
Buy USB A to 9 Pin USB Motherboard Header Adapter Converter Cable for $9.99 with Free Shipping Worldwide (In Stock)
Price $9.99
eBay
ebay.com › electronics › computers/tablets & networking › computer cables & connectors › usb cables, hubs & adapters
USB-3.1 Type-C Male to USB-3.0 Standard-A 9-Pin Female Adapter , USBC-C3A2 | eBay
USB-3.1 Type-C Male to USB-3.0 Standard-A 9-Pin Female Adapter , USBC-C3A2
This USB Adapter features a new Type-C USB-3.1 Male Connector on one side and a Standard USB-3.0 Type-A 9-Pin Female Connector on the other side. The Type-C connector is reversible can be plug either way no orientation of the connector is required.
Price $8.98
Amazon
amazon.com › DTECH-Serial-Adapter-Supports-Windows › dp › B079LZSF32
Amazon.com: DTECH Serial Cable to USB Adapter DB9 Male RS232 Port Supports Windows 11 10 8 7 Mac (6 Feet, PL2303) : Electronics
9 pin serial to USB cable male to male port allows PC to connect serial RS-232 devices and programs that communicate through COM port (NOT VGA-Monitor-Video-Cord ) RS232C DB9 to USB adapter with gold plated connector ensures reliable data ...
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.
eBay
ebay.com › electronics › computers/tablets & networking › computer cables & connectors › parallel, serial & ps/2
USB 2.0 to SERIAL DB9 Male 9 PIN RS232 1FT Cable Adapter US Seller Fast Shipping | eBay
USB 2.0 to SERIAL DB9 Male 9 PIN RS232 1FT Cable Adapter US Seller Fast Shipping
USB 2.0 to Serial RS232 DB9 9-Pin Adapter Cable GP · Connector B · Serial (RS-232) Male · UPC · Does Not Apply · Connector A · USB 2.0 · Compatible Model · RS232 · MPN · Does Not Apply · Cable Length · 1 ft · Category · Joined ...
Price $29.87
AliExpress
aliexpress.com › w › wholesale-9-pin-male-serial-to-usb-adapter.html
9 pin male serial to usb adapter-AliExpress
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eBay
ebay.com › 9 pin male to usb
9 pin male to usb products for sale | eBay
Get the best deals on 9 pin male to usb when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands | affordable prices.
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
Reddit
reddit.com › r/retrogaming › can you recommend a 9 pin to usb controller adapter
r/retrogaming on Reddit: Can you recommend a 9 pin to USB controller adapter
June 2, 2023 -
Do you know of a good adapter that would allow me to connect a Atari/genesis controller to my pc USB port to use with emulation?
FTDI
ftdichip.com › home › drivers
Drivers - FTDI
March 17, 2026 - D3XX drivers are only suitable for FTDI’s Superspeed USB bridge services (e.g.
The Home Depot
homedepot.com › p › Micro-Connectors-Inc-USB-to-Serial-DB9-Adapter-for-Windows-10-Win-8-7-XP-Vista-E07-160 › 310860172
Micro Connectors, Inc USB to Serial DB9 Adapter for Windows 10/Win 8/ 7/ XP/Vista E07-160 - The Home Depot
Micro Connectors, Inc USB to Serial DB9 Adapter for Windows 10/Win 8/ 7/ XP/Vista E07-160
Enables a serial device to be connected to a computer through the USB port. Great for PDAs, cell phone, digital cameras, and modems over 500 Kbps data transfer rate. True Plug and Play, No additional power needed, light weight, No Interrupt setting, Easy COM port and speed setting. Easy to install for Windows 8, Windows 7, Vista, and other Windows Plus Mac system. This product uses the popular Prolific 2303 chipset.
Price $11.82