HiLetgo 5pcs Nano I/O Expansion Sensor Shield for Arduino UNO R1 Nano 3.0 Duemilanove 2009

I have purchased a number of electronic components from Hiletgo. they are always well made and securely packaged. These are no different. Very pleased.The only drawback is lack of documentation but the PCB is clearly labeled and not difficult to figure out.

This board works well-- BUT there is a caveat you must know. In the description it says, "1 Servo power input." Perfect, because I intend to drive twelve hobby servos from my PC via USB using my NANO, which is certainly possible, and, thanks to the many servo-configured pinouts of this board, extremely convenient. I proved the board's value by running a tiny 9g servo using (barely sufficient) USB power. Now to supply sufficient current for many servos and I'm there! The 'servo power input' is an onboard jack like one on an Arduino UNO, and I see what looks like a voltage regulator circuit under the NANO socket, so I hooked up one full-sized servo to test and plugged in an Arduino-compatible 9VDC power supply to power both the NANO and the servo. I immediately lost the ability to communicate with the NANO by USB from my PC. The NANO and board were functioning, because my LCD on the board's I2C breakout pins A4 and A5 still worked. After much head-scratching, I did what I should have done from the start, and through which most of my inventions have come into being-- I entered a brief season of prayer and it immediately came to me that, because servos use 4 to 6VDC, the copywriter chose the words, "Servo power input." Sure enough, when I unplugged the 9VDC power and plugged in a 5VDC power supply, the test servo worked as expected! I really like Hiletgo's products. I don't think they manufacture this board, but only distribute it, because other companies also sell it with different 'ABOUT THIS ITEM' copy. But I think Hiletgo would do well to discover and give us some specific electronics information about the board for others like me who may not at first perceive that 'Servo power input' means <= 6VDC, or whatever it actually is around 5VDC. Love this board!

Love the way the board looks and the layout of the pins with VCC and Ground next to each signal makes this board extremely nice for quickly prototyping with the Nano. The board also shares the mounting hole layout with the UNO so I found it easily fits many mount points designed for the UNO (although keep in mind this board is about 10mm shorter so the power plug will not line up with a project box designed to have the power connector flush with the outside)Although the packaging does not match what is pictured, the boards arrive well enough protected, each individual sealed in its own ESD bag. My only real complaint with the boards is that if you flip them over, they seem to suffer from mediocre soldering. I attached an image of one of the boards where you can see a gap in the solder on the 5V pin. That said, you can also see where there was some hand touchup done (flux and excess solder is a dead give-away) so coupled with the fact that every pin I've tried is electrically connected (for now) leads me to believe that the boards were in fact tested at the factory. If your up for a little touch up work with a pencil iron I highly recommend these little boards.

This doesn't eliminate the breadboard, but it does simplify and speed up the wiring. With so many GND and 5V pins, you usually don't have to use breadboard rails, reducing wiring clutter.

Used it today drive 3 steppers for a pen plotter. Works as expected and excellent build quality.

Defective. They destroyed my (2) NANO cards. I am sure it is quality issue since they are so cheap.Returned.

The PCB seems to be of decent quality. Silk screen markings are very legible. No issues with connectivity or Nano insertion. So far so good

Edges of the PCB are rough and have splinters on them. The male pin headers for what I assume are the UARTS soldered in going uphill. The back of the cards has solder flux on them and it looks like some rework has been done as well. These are probably rejected/failed cards that required a little rework to get them going. I have not tested them compatibility or operation, if they fail I will edit my post so assume they worked. This is just a poor quality product, I pass on a purchase.