I needed 32 hobby servo motors for a project, so I ordered 25 Tower Pro SG90, since I had a whole bunch of them from a previous project.
Now when I go through them and test them, I've found at least two, which are continuous motors (you know, those which always rise arguments about whether they are servos or not). As continuous motors they work well, running in both directions at different speeds depending on the "angle" in the servo command.
But the strange thing is that they are labeled exactly the same as the real servo motors. Tower Pro Micro Servo 9g SG90.
Wait. There should be the TM superscript after Tower Pro in the label, but on this one it says MT. My guess is these are so cheaply produced they simply mix the different products by accident. The casing is identical, the set of servo horns included are probably the same, even though the continuous motor could use something different, like cog wheels or belt wheels.
