It’s another finger mouse
You know how it is, you wait a long time for one and then all of a sudden a whole load of them come along, this is the second finger operated mouse that we have featured, and this one is the best so far! Just check out the specs:
Features:
- Wireless, using radio frequency, absolute freedom!
- Compact: around 1/2 to 1/3 of conventional mouse.
- With 3 different ring sizes to fit for different people with different finger sizes
- High Resolution: 1000dpi
- Optical, making it working on all surfaces.
- USB Interface
- Powered by internal battery and rechargeable by USB (USB cable included)
- Plug-N-Play, no need for driver installation.
- Ergonomical design
- Long Working Distance: 15 meters
Specifications:
- Dimensions: 60×40x38 mm for Mouse
- Dimensions: 72×17x8mm for Receiver
- Net Weight: 25g for mouse & 10g for Receiver
- Build-in lithium-ion battery: 3.7V 230mA
- Charging time: 2 house
- Continue using time: 14 hours
- Stand by time: 170days
Recommends for:
- Presentation
- In some environment where a flat place for a conventional mouse is not available
- In-flight, train, car… where you hand cannot rest on
But there is only one thing that is outstanding, what if you are left handed?
Priced at $26.99
Source [USB Fever]
(No Ratings Yet)
Loading ...DIY HACK - How to make your own Metal Detector!
I’ve noticed many people using metal detectors on the beach lately to find treasures or junk but here’s a great way to make one of those yourself!
BFO ( beat frequency oscillator ) metal detectors use two oscillators, each of which produces a radio frequency. One of these oscillators uses a coil of wire that we call the search loop. The second oscillator uses a much smaller coil of wire, and is usually inside the control box and is called the reference oscillator. By adjusting the oscillators so their frequencies are very nearly the same, the difference between them is made audible as a beat note, this beat note changes slightly when the search loop is moved over or near to a piece of metal. It has been found in practice best to make the search oscillator fixed say at 100khz and to arrange for the reference oscillator to be adjustable 100khz plus or minus 250hz. This gives a beat note of 250hz to 0 to 250hz. The beat note disappears or nulls when the two oscillators are about equal. This type of detector is most sensitive when the beat note is close to zero, about 5hz ( motor boating ) any slight change being noticeable.
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