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Reviews (3)
Feb 23, 2016
Missing LED and bad motor
2 of 2 found this helpful One of the two driver boards was missing an indicator LED, which should have been spotted in even a cursory inspection of the board by QA.
One of the two motors is malfunctioning after only a few hours of use; it gets about 20 degrees F hotter than the other under the same load, makes a clicking noise, and if you put your ear next to it, you can hear electricity arcing inside the motor as it runs. It also has trouble with some of the movements my CNC plotter requires of it, causing it to lose steps and ruin the entire print.
On the other hand, these motors are very cheap. They can easily be converted from unipolar to bipolar, which doubles their torque and lets you use them with some of the common driver modules available today, such as the Arduino motor driver shield.
Long story short, when you buy some of these motors, make sure you get spares from the very beginning, because you'll probably have one that's defective in a batch, and you don't want to have to wait for shipping twice.
Jul 14, 2011
You get what you pay for.
I bought this hard drive to back up my laptop before re-installing Windows & on it. The hard drive was inexpensive and has more storage capacity than my laptop does. On the other hand, I noticed that even empty this 1 TB hard drive actually only holds 931 GB, roughly a 10% difference (1 TB = 1024 GB). I know that partition formatting takes up some of the space, but an empty drive should not already be 9.1% full. This device is clearly on the lower end of the quality scale for storage devices of its size. But at the end of the day it still does what I bought it for!
Dec 12, 2017
Unbranded, no headers included.
5 of 5 found this helpful It is an unbranded copy of the WeMos D1 mini. Neither the ESP8266 board nor the larger board have "WeMos" on them, and it says "m1n1". It does not match the picture.
It's a cheap Chinese clone, so you're taking a risk on the quality.