How is this powered?
1248343
This is a servo motor. It's not powered like a standard DC motor. You can't simply supply power to it directly from a battery or other power source. It needs to be controlled with a very specific signal. Servos typically require a 50Hz signal with a pulse width ranging from 1ms to 2ms and a voltage of 4.8-6VDC. The width of the pulse determines how far the servo rotates. For example, this servo rotates to it's neutral position (90) when supplied a 1.5ms pulse width. A 1ms pw will rotate it to it's minimum position (0) and a 2ms pw will rotate it to it's maximum (180). Unlike a standard motor, a servo requires constant power to maintain it's position. If you disrupt the power to the servo, whatever it's holding may cause the servo to rotate out of position. You can build your own circuit to drive a servo, or you can use one of hundreds of servo controllers available from Amazon and other suppliers.
1248344
they will get the power from whatever controller board you use, 9 volt battery can easily run 4 or 5 depending on how they are used and board they are connected to. They are not constantly on, only draw power when they are used.
1667705
I run this from the outlet, and it's been exceptionally reliant. There's a back-up battery for emergency power outage.
2218931
No, it is powered by a cable which is included. It plugs into a standard outlet.
1817195
It is powered via the USB connection from your computer(s). It has worked great for my husband and I sharing two printers between our two computers.
533765
It can be powered either way. A power adapter is included in the box as well.
2256934
It is only powered via the USB under its dust cap. It must be plugged into a usb port for power.
976953
The power comes from an electrical outlet. It is relatively quiet. Ambient noise.
1179567
you plug it into a wall outlet and then into the computer with a usb cable. so the power does not come from the computer
1804267
Powered from the phone line. I would set it on a small shelf to mount it to the wall.
1253950
there is a voltage converter you simply plug in. That part of the is wired.
1854108
It's an elecrically powered brush (I believe), but since I don't have a physical separate plug-in (wired behind my wall) I can't be 100%. If I were a bettin' girl, I'd say it's elecrically powered.
1772032
It is powered by the USB port. In fact, actual USB 3 ports have stronger power than USB 2.
2228286
It is not powered, it is a passive antenna. Just plug it in and position it where you get the best reception for your application. Good luck
1460878
It is powered by an internal battery. It is charged by a charger that comes with it. The charger plugs into a wall outlet, it is not a usb charger.
1111716
It isn't powered. It's just the flat bottom piece, two vertical tubes, some carbon, and plastic heads for the tubes. You need a power head or some other air-blowing device to make it work.
60065
It is battery powered. (Sorry I had to delete previous answer accidentally posted using our office account.)
1511558
Yes. It is electrically powered through an extension cord. It is NOT battery operated.