Nano V3.0 Board for Arduino, Keywish Mini V3.0 USB Nano ATmega328P 5V 16M Micro Controller Board Welded Module (5PCS + 1Cable)

I have read through the reviews and I understand some of the complaints and can see why they did not rate this as high. I purchased these with the headers already attached and a different companies with the headers that would need to be soldered in by me. Since I did not purchase from either of these companies before I was not sure which way to go. I was not sure how the quality would be for pre installed headers and the soldering quality, The cost happened to be less for this one with the headers all ready installed. Both versions worked fine. Sometimes you may need to make sure the board and Ports selected in the IDE before trying to load a sketch. I sometime needed to load the program a couple of times but just check to make sure everything is selected manually first. Since both of the companies I selected both use the CH340G IC, IDE will not detect the board type the indicate which port it assigned it to. So you manually need to select the board and check the ports and if it displays more than one port pick the last one in that list. Then try to down load the program once or twice. Once I did that in never had the problem to load a program again. So sometimes when testing boards and you feel you only go two or three board out of 5 to work , it may be the IDE may have dropped the Board and Port information and needs to be manually reset. The complaint of using the white non antistatic foam could be a concern and they should look into it to make sure this product will not be damaged using this to protect the pins and not sure how these boards are fixture before soldering the headers in to make sure they get soldered in straight so they will always line up with a solderless breadboard. Otherwise the rating will be lower. Since the cost was less I gave them 5 stars as I did not see any direct issues with my boards . But the quality need to be a top concern. If the White Foam for protecting the pins is not antistatic with low humidity could be a concern of damage to the boards.

This is the second batch of Arduino Nanos I have purchased. The first batch I bought was 3 for $12. These were 5 for $15. So as long as they all worked they were a better value. This batch came in ESD bags wrapped in bubble wrap shipped in a padded envelope. I was worried some may be bent or damaged but everything was straight and intact and all units powered up just fine. The previous batch I bought came with headers but they were detached. I appreciated the fact that all the headers on these Nanos came pre-soldered. Considering these were pre soldered, they are at a cheaper price point per unit, and all of them worked, this set of Arduino Nanos were a good deal.

As others have said, this is an Arduino nano clone, not genuine but that's just fine. They have swapped the RS232-USB chip for a different part. On the Nano, the USB chip generates the 3.3V output, but these boards seems to be running a bit high at 3.6V so something must be wrong with the design where these 2 chips aren't actually compatible.Besides the high 3.3V rail these seem to work just fine. The power LED is way too bright for my opinion which wastes power and makes placing the ICSP connector difficult because you're blinded by the LED and can't really see the ICSP pins very well.

I had an idea for one of those stupid projects that take a lot of time and parts to do something that a sticky note or Alexa request could solve easier. I wasn't sure that this little board would be able to handle everything, especially when I added the micro SD. So far we have the micro SD, a 16 key keypad, a real time clock and a cute little display. All this with a few pins left over. The keypad uses most of the pins as the RTC and display share a 2 wire bus and the SD drive only uses a few more pins. If I sound like a caveman that just discovered fire it's almost like that. It's been almost 30 years since my last project. You kids these days don't know how easy you got it. Back in the day we had to dig our own quartz to make our transistors :DUpdate - Had to remove the SD reader. Not the Nano's fault, there is apparently a known issue with the SD reader not playing well with SPI displays which makes no sense to me as they use different pins but after lots of testing and reading that's what I came up with.

Received 5 Arduino Nanos. Amusingly, each one was sealed in an ESD protective bag. Inside the bag, the Nano was stuck in non-conductive white foam to protect the pins. The amusing part is that if the Nano was truly ESD sensitive, placing it in non-conductive foam is a good way to destroy it. Fortunately, these devices can be handled with no more than moderate care. All five devices powered up and ran the pre-installed Blink routine. I installed each Nano in a circuit that exercised SPI and PWM capabilities and successfully downloaded and ran the corresponding sketch.The single complaint I have about these is the pre-soldered headers. Of the five devices, two had one of the long rows of header pins installed at a noticeable, albeit slight, angle (not perpendicular to the board). As a result, they could not be easily installed in either a breadboard or protoboard. I carefully bent the pins out slightly, after which I was able to work them into a breadboard for testing. I bought these with pre-soldered pins because I was feeling lazy. Given how easy it is to solder in the headers (and keep them perpendicular), I'm not sure I came out ahead. The solder on the headers is at least neat and it appears likely that all the pins are connected (my circuit only exercised a little over half the pins).Update 28 June 2018: These devices use the CH341, which is a different UART than the original nano. Under Windows, if the system doesn't automatically install a driver, you may need to download and install one yourself. Also, there is a new bootloader for the nano as of early 2018; these use the old bootloader, so you need to select "Board: Arduino Nano" and "Processor: Atmega 328P (Old Bootloader)" before downloading code.