DSD TECHSH-U09C2 USB to TTL Adapter Built-in FTDI FT232RL IC for Debugging and Programming

I use mine to program breadboarded ATmega1284 microcontrollers. It works perfectly. There is a good tutorial online if you search for it. This product it very well made.

Works great - use to reprogram bk* chip

Over the past few years I have purchased seven of this adapters. I find them very useful, built with quality and well supported. Why buy 7? Each has been used on a different project (projects with FPGAs, Raspberry Pis and generic Arduino boards). I find the USB side works well with Windows and Linux --and-- the digital side works well with 5v and 3.3v. When I have asked questions back to DSD, I have gotten prompt, useful answers. Call me a happy customer.

Great product for USB to UART

I have a pile of assorted serial adapters sitting all over the place on my workbench, and I almost never use them. Either they're loose wires with unlabeled cables, or they're 5v when I need 3v3, or the power is unlabeled as well! Or my workspace is so chaotic that yet another bare board is just a recipe for shorting out my computer's USB port.This, however, is really the only device that I should have. It appears to be a genuine FTDI chip (0403:6001), with selectable power and logic levels. The pins are clearly labeled, and it comes with a set of Dupont wires. The whole thing is wrapped up in a plastic case that keeps it and your computer safe from the other stuff on the workbench. Lastly, LED indicators for power, RX, and TX help you to identify connection problems.I would appreciate maybe a little more shrouding around the pins and jumpers, but what I'd *really* like is if all my other serial adapters turned into these.

I like that it has straps for various voltage levels. It has a clear case with clearly indicated signal lines - very nice. That will come in useful.If you just plug this thing in, it will not do anything.I use other FTDI devices (including some in our designs) and they just work by plugging them in. This one requires their driver, which is fine.After installing the driver, it wants a reset - unusual but ok.I wasn't ready to reset because I was in the middle of an edit and build so wanted to wait until later. The installation then proceeded the system to crash hard, with a blue screen and all the scary trimmings.It basically reset itself in a very rude way. That really irked me. I wasn't ready to reset and to see a blue screen seconds after installation is very disconcerting.After the PC came back up, the device worked. A bit clunky but does work.Save your work and install this thing when you're ready to reset.The price is right.

It's FTDI, works great at a good price. Buy it.

I bought this after my prior (allegedgely 3.3V) serial cable stopped working after being connected to a 3.3V system. This is very nicely made -- it's enclosed in a clear enclosure (no worries about stray wires shorting out while tinkering) and lets you select 1.8, 3.3, or 5V out (no 2.5, though DSD has another unit that adds 2.5V as well.) A cable is inclued that connects to the I/O header on the end of the USB adapter that is terminated in 1x1 female header pins -- it's about a foot long. While I'm not a fan of blinky lights, at least you'll know this adapter is working. I've had no issues working with a Raspberry Pi as a console cable and also programmed a 2.5V arduino-type microcontroller successfully. I use Linux and no drivers were required out of the box, just plug an play.