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Infrared Mice. Wait, What? | Ultraphyte
So the researchers injected upconversion nanoparticles into the retinas of mices. The nanoparticles coated the mouse photoreceptor cells, where they could absorb infrared and emit light in the visible range (green). When the mice were given green light (535 nanometers wavelength) they produced electrical signals. And when the nanoparticle-injected mice were exposed to near-infrared light (980 nm) them also produced electrical signals–in response to the green light emitted by upconversion of the nanoparticles.
mice  science  nanotech  vision 
9 days ago by yorksranter
USB 3.0 has been found to cause interference that may hinder performance of nearby wireless devices in the 2.4GHz band, including Wi-Fi and Bluetooth. : technology
(On reducing wireless-mouse interference from USB 3.0 devices—)
“Rough TL;DR for those looking for the hard data (note that the paper only discusses how interference affects wireless mice):

“• Both ends of a USB 3.0 Cable, and to some extent the cable itself, generate interference, especially in the 2.4GHz range.
“• When a wireless (i.e. 2.4GHz band) mouse was tested (with its receiver connected to a USB 2.0 port adjacent to a 3.0 port with a 3.0 device), mouse response dropped off when the mouse was about 3 feet away.
“• With the mouse’s receiver using a stacked USB port on top of an active USB 3.0 port, the mouse was essentially unresponsive.
“• With the mouse’s receiver moved to the other side of the laptop (away from the active USB 3.0 port), mouse responsiveness was fine up to the max distance tested of 5 feet.
“• The responsiveness of different mice at various distances varied, meaning there is potential to improve wireless performance through more intelligent antenna placement in the mouse by the manufacturer.
“• Interference was able to be reduced (but not eliminated) by adding shielding to either end of the USB 3.0 cable.

“TL;DR^2 : So its sounds like if you use a laptop and wireless mouse, as long as you don’t put your wireless mouse receiver in a stacked USB port on top of a USB 3.0 device, you’ll be fine. If you use a wireless mouse on a desktop computer, the receiver is probably a bit farther away than it would be for a laptop, so try to put the receiver as far away from used 3.0 inputs as possible.”
usb  usb3.0  wireless  mice  reddit  2012 
7 weeks ago by handcoding
The Best USB 3.0 Hubs: Reviews by Wirecutter | A New York Times Company
(On wireless devices and USB 3.0 ports/hubs—)
“USB 3.0 ports and devices have been shown to emit radio-frequency (RF) noise that can interfere with devices using the 2.4 GHz wireless band; such devices include wireless mice and keyboards that use an RF dongle for wireless communication.

“The RF noise can come from anywhere along the USB 3.0 connection. For example, if you have a USB 3.0 hard drive plugged into a USB 3.0 port, the interference can come from the port on your hub, the USB cord, or even the drive’s USB port. This noise isn’t always an issue, but if your wireless mouse or keyboard constantly drops its connection, or if you lose clicks or keystrokes, you should try connecting the mouse or keyboard to a USB 2.0 port and keeping RF dongles and devices away from active USB 3.0 connections. If your computer doesn’t have any USB 2.0 ports, you can use a USB 2.0 extension cable to move the RF dongle farther from the source of the interference.”
usb  wireless  mice  wirecutter  2019 
8 weeks ago by handcoding

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