JY-MCU USB Serial Port Adapter Download Line for Arduino

Pros: Works plug-and-play in windows 7. windows automatically installs ft-232 chip driver. must work on other os as well, with generig ft-232 drivers.
pins clearly labeled
led-s show rx, tx, and power status

Cons: have not tested DTR pin that resets the arduino yet
have not tested 3.3 V pin voltage yet

Other: it works well for RX/TX.
DTR and 3.3V line need to be tested

Pros: Easy to use. No trouble getting drivers installed (Windows XP).
Works as good as the on board USB to FDTI adapters on other Arduino boards.
Cable included.

Cons: There aren't any cons, the product has every thing I expect it to do.

Other: works great! ships for free! lots of information is available on the internet it you need help troubleshooting anything.
works great! ships for free! lots of information is available on the internet it you need help troubleshooting anything.

Pros: - good build quality - can easily be connected to your projects because of included wires - works very well (tested it on WinXP PC)

Cons: - DTR pin for resetting does not seem to work. I just did not connect it and press my Arduino compatible project's reset button manually when Arduino IDE starts to upload the Sketch

Other: Very useful though the reset button has to be pressed manually when programming an arduino with it.

Pros: This is a great little USB to Serial adapter, ideal to use with Arduino, even in breadboard assemblies. The 3.3V and 5.0V pins work very well and are within 2% of the spec voltage, which is great. There are LEDs for TX and RX. Other users have reported problem with the DTR pin, but mine worked flawlessly: all that it needs is a 10uF ceramic capacitor between the DTR pin and the Arduino RST pin (pin 1 in the Atmega328). Also, the RST pin needs to be kept high using a 4K7 (anything between 4K7 and 10K will work) resistor between +5V and the RST pin. For breadboard arduino, the breadboard's power supply can be taken from the USB adapter. However, it cannot supply more than 500mA, but the ideal is to keep the current at 350mA max.

Cons: Absolutely none. Everything in this device works as expected.

Other: If you need a small, compact, no-hassle, easy to use programmer, get this.

Pros: Slim build. No need to attach an USB cable. It's nice that it has both 5 (depends on your USB port) and 3.3V out.

Cons: Seems a bit cheap with the shrinking tube, but it gives it a nice 'no wasted money'-look. The power LED is a bit to bright. I would like to have access to other lines (such as RTS) on the board for some projects.

Other: This was one of the cheaper usb->serial-adapters I found here, and it does what it's supposed to. I suppose they could have shaved a dollar or so on the price. Also: it works (of course) in linux.

Pros: - good quality - wires included - easy to use - has power supply lines for your cheme - pins clearly labeled - led-s show rx, tx, and power status

Cons: i find no cons Everything works as expected.

Other: if you need COM-port with TTL levels - by this

Pros: This is an awesome piece of hardware. No, really. It's useful for Arduinos, PICs, Raspberry Pis. Have used with all of them and it works perfectly. Build quality is nice. Great plastic protection. Well soldered. Wait, is it cheaper than when I bought? Oh yeah, it's cheaper. This thing is cheap.

Cons: Guess it could have a cable instead of pin header. They give a cable to connect to the header, though.

Other: Why didn't you buy one yet?

Pros: Cheap, works just as it should. What else would you want ? As you can see comes with a cable that can be connected as you need so if you have a different setup but the same pins, no problem.

Cons: Ehhm.

Other: Perfect , exactly what i was looking for. Haven't tried it yet (as i thought of it writing this), but i bet you can put it in a breadboard, the Arduino next to it and start your upload. Will try that soon.

Pros: Small and cheap, and works. If you need an adapter for your Arduino or some other projekts as the Raspberry Pi, just use this adapter.

Cons: Need to download ft-232 driver for Win XP SP2 from the FTDI Homepage

Other: Buy it if you need a cheap RS232 to USB adapter

Pros: These are excellent little USB to TTL-serial dongles. They use an FT232RL, which is a great chip and works everywhere. The board has dedicated status/data LEDs and you can switch between 3.3V and 5V operation via a solder jumper (the default is 5V via a cuttable trace between those pads). The bundled flying lead cable is great since it means you can connect to any odd .1" header you might encounter without any soldering. DTR is broken out to an extra pin, which you can use as a reset line. Dedicated VBUS (5V) and 3.3V outputs are present. These have been rock solid for me so far, even when used in weird situations.

Cons: No real cons, but a few wishlist items: - It's wired by default for 5V. 3.3V is actually more useful these days, and IIRC the FT232R will still tolerate 5V input so it would still work with most 5V devices just fine (as long as 3.3V is above their Vih). - It'd be nice to have the other flow control pins broken out to pads on the sides, just for that odd case when you need them or want to use them as GPIOs

Other: Buy it. Buy 4 or 5.