






⚡ Power your projects with speed and precision — don’t get left behind!
The DSD TECH SH-U09C USB to TTL Serial Adapter features the high-stability FTDI FT232RL chip, enabling up to 3Mbps data transfer speeds. It supports both 3.3V and 5V output voltages, indicated by LED status lights for TX, RX, and power. Compatible with major Windows and Mac OS versions, it’s a reliable tool for debugging and programming microcontrollers, backed by responsive customer support and a 1-year replacement warranty.






| ASIN | B07BBPX8B8 |
| Best Sellers Rank | #67 in Serial Adapters #4,948 in Cables & Accessories |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,092) |
| Date First Available | March 9, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.13 ounces |
| Item model number | SH-U09C |
| Manufacturer | DSD TECH |
| Product Dimensions | 2.2 x 0.8 x 0.1 inches |
M**A
Good product
Worked perfectly with no driver issues
A**R
Great for USB to TTL interfacing.
I needed this to program a Nextron LCD display via a USB port. At first, my Nextron screen showed only lines and static. Then I realized the power jumper was set to 3 volts, and the Nextron required 5 volts. After that, no problems. It just works.
L**I
Simple design that works,
Bought it to flash some receivers for my hobby. Worked like a charm, so far no issues, easily readable by computer and cost isn't that bad. Simple design that works,
S**.
FTDI chip is superior to CP2102, pay the extra few dollars
The FTDI drivers are flawless unlike the CP2102 drivers which are old and outdated. Save yourself the headache and trouble and pay 5 more dollars for the FTDI chips, you will thank yourself in the future. The variable voltage selection jumper on this converter is very useful for handling hardware that runs on 3.3V instead of 5V, saving yourself the hassle of buying, owning, and subsequently finding the right voltage TTL reader. The jumpers included on this were also nice. Great value, would buy again, would recommend to anyone looking for a TTL reader. Use case: Reading serial terminal data off an SBC due to bugged OS compilation software (a lot of bootleg, or alternative rpi clones do not have reliable wifi config options when compiling and writing the software to the boot media. Often, these have no video output, so doing any computing becomes impossible. You need one of these to change the settings on the OS after initial boot to connect to your network to SSH into them).
R**.
Real FTDI chip. Works great.
I bought this adapter to interface a uBlox Neo-8M GPS module to use as a time reference with PPS to create a stratum 1 NTP server on Windows 10. It powers the GPS with no problem. I soldered a lead to the CD (carrier detect) hole on the PCB and connected it to the PPS output of the GPS module. It works, but be careful. It appears that the RS-232 control signals (CD, CTS, RTS, DTR, DSR, etc) are inverted. So my PPS driver was triggering on the falling edge of the CD signal instead of the leading edge. I was able to compensate for this by using an offset.
D**X
Worked well for modding T962A reflow oven
Plug and play on Windows 11, no additional drivers required. Used flashmagic tool and instructions I found online to put the T962A into bootloader mode then flashed like a champ. Likely won’t have to ever use it again but good quality for peace of mind.
M**Y
Not good enough
This is not strong enough to put my ESP 32 into boot mode by itself. Returning
J**B
Works fine with Windows, Linux, or Raspberry Pi, but not Reyax RYLR998 LoRa
Update: The boards work perfectly in every way, except with the Reyax RLYR998 LoRa boards. On Windows, Linux, Raspberry Pi, or Android, they just will not work with the LoRa board. I have returned the boards and changed my rating from 5 to 4. I had no installation problems at all. The boards are seen as "com12" on Windows and "/dev/ttyUSB0" on Linux and Raspberry Pi. I found that the "cutecom" program is available on all three platforms, which gives me a good way to use them for initial testing or to interface to Reyax LoRa radios. Using various online examples, I was able to make a little Raspberry Pi Python program use the boards. Other terminal programs that worked for me are: "Serial USB Terminal" on an Android phone, PuTTY,HTerm, gtkterm, screen, cu and Picocom on Linux, PuTTY and Terminal.exe on Windows. However, I came to learn that that the Raspberry Pi has its own "UART" built into the GPIO pins. If you want to control a Reyax LoRa Radio from the Pi, you don't need these DSD Tech boards at all. Just hook up to the proper GPIO pins, enable serial I/O in raspi-config, and specify /dev/ttyAMA0 instead of /dev/ttyAMA0. From a Python program, the GPIO pins and the DSD Tech board are used in exactly the same way.
C**E
Propre parce que le boitier protège bien la clé et permet de la manipuler sans problème. Fiable parce qu'elle a fonctionné tout de suite sans avoir besoin de drivers (sous MacOS/Unix en mode terminal). Enfin, au niveau des plus : - Elle est livrée avec un câble de raccordement des pins (femelle-femelle), Que je n'ai pas utilisé car j'avais besoin de mâle-femelle, mais j'étais déjà équipé. - La puissance de sortie est suffisante pour alimenter/flasher un module ESP8266 (Shelly à rendre compatible Homekit). Pour le moment, j'en suis très content.
J**R
Funciona correctamente, y está muy bien al estar encerrado en caja metraquilato (o similar). Tiene jumper para selecciona salida de voltaje a 3,3v o 5 v dependiendo de lo que se vaya a conectar. Ha llegado perfecto y en el plazo indicado al realizar la compra.
L**.
l'Adattatore seriale da USB a TTL DSD TECH con chip FTDI FT232RL è un acquisto fortemente consigliato per hobbisti, ingegneri e sviluppatori. Offre una combinazione vincente di affidabilità, compatibilità universale e funzionalità pratiche che semplificano il debugging e la programmazione di sistemi embedded. È un piccolo strumento che fa esattamente ciò che promette, senza compromessi. Chip FTDI Originale e StabileVersatilità dei Livelli Logici La possibilità di passare facilmente tra livelli logici TTL da 5V, 3.3V e 1.8V Facilità d'Uso Plug and Play Indicatori LED Utili: La presenza di indicatori LED per TX (trasmissione), RX (ricezione) e alimentazione
S**.
Good Solution for Serial port converter, used to reset the Electronic devices. Thank you.
Y**N
Honestly I havent used for some reason not related with product.