Tuesday, September 10, 2013

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Apple announced OS X 10.9 Mavericks this week and so we're offering up the official, giant wallpaper. Because one isn't enough, we're sticking with the surfing theme to fill out the rest of the pack.

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | Apple 5120x2880

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | The Paper Wall 2560x1600

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | The Paper Wall 1650x1100

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | The Paper Wall 1920x1080

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | The Paper Wall 3840x1080

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | The Paper Wall 2560x1600

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | The Paper Wall 1680x1050

Set Your Desktop the OS X Mavericks Wallpaper (and Other Giant Waves)

Download this wallpaper | The Paper Wall 1920x1080

For more great wallpapers, check out our previous Wallpaper Wednesdays. Got any great wallpapers you'd like to share? Email me a link with "Wallpaper Wednesday" in the subject line. Submitting your own work is highly encouraged!


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How many of you actually use voice actions?

How many of you actually use voice actions?

Great discussions are par for the course here on Lifehacker. Each day, we highlight a discussion that is particularly helpful or insightful, along with other great discussions and reader questions you may have missed. Check out these discussions and add your own thoughts to make them even more wonderful!

For great discussions any time, be sure check out our user-run blog, Hackerspace.

If you've got a cool project, inspiration, or just something fun to share, send us a message at tips@lifehacker.com.

Happy Lifehacking, everybody!


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Genmaicha - roasted rice tea

DSC_0440.JPGThis is a recepie to make roasted rice for japanese genmaicha tea.

Genmaicha is the Japanese name for green tea combined with roasted brown rice. It is sometimes called "popcorn tea". This type of tea was originally drunk by poor Japanese, as the rice served as a filler and reduced the price of the tea; which is why it is also known as the "people's tea." Today it is consumed by all segments of society.


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Super Easy Embossed Pendants!

To make these pendants you'll need:

1) Cardboard or thick papers,
2) White glue,
3) Thick polythene paper,
4) Scissor,
5) Pin (to make a hole in the pendant),
6) Glitter paint (golden and silver),
7) Black acrylic paint and paint brush,
8) Jump rings.

You might also need pen or pencil and paper to draw some designs for the pendants. 


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Salted Caramel Brownies

13, 9:34 PM.jpg1) brownie mix (any kind is fine) 2) pretzels (once again, any kind is fine. But try to get flat ones) 3) salt 4) caramel (homemade is good. Or you could even get some from the store. It's in the ice cream isle. 5) also make sure you have a brownie pan

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Build a Bunch of Table Top Tardis

Lets Build Them:

Parts List:

25 Boxes from Uline 

4-5 cans of Sail Blue color Rustoleum paint (Lowes or Home Depot). The color is close to Tardis blue and I found the color value on line to make a swatch from to use in inkscape. If you want to be true to the show, there is the BBC Authorized TARDIS Blue: Pantone 2295C

5 8' sections of 3/4”X1/4” screen molding 
This gets cut into 5” pieces and each Tardis uses 4. Make extra! They make great refrigerator magnets.

40 11X17 prints of the attached pdf.

20 1W LED's mounted on a star

20 75Ohm 1/2W Resistors buy 100 they are cheap

20 nine volt battery clips 

20 nine volt batteries (Alkaline!)

1 can spray glue 

Wood glue or white school glue for paper
Tools:

Hot Glue and glue gun

Utility knife (with new blade)

Small piece of cardboard (to make cutout template)

Pencil

Scrap wood to use as cutting surface

Paper shear (or scissors) I borrowed one.

Small hand saw and miter box.

Fine Sand Paper


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Monday, September 9, 2013

3D Printable Adjustable Volume Pipette

IMG_1752_display_large.jpgPipettes are prolific in laboratories everywhere and used to transfer variable amounts of liquid. Professional tools are calibrated and have dials that allow the user to set the volume. The following instructions are the result of an experiment to develop 3D printable and low cost alternatives to standard lab tools, such as the pipette. This simpler version uses a straw and allows the user to adjust volume using two limit thumb nuts. It should be very useful around any wet lab and works nicely with a relatively high range of possible volume settings. You can calibrate the volume but it is generally only good for low precision work. With the exception of a balloon or rubber glove, spring, straw, and some tape, all the parts are 3D printable without support using a variety of low cost printers. This is a very nice example of alternative lab tools and I hope will contribute to further work in the area. You can also find this model and some user remixes on thingiverse: http://www.thingiverse.com/thing:64977 IMG_1758_display_large.jpgPrint the upper body, lower body, plunger, and two thumb gears using a 3D printer, the STL files are attached. I printed all the pieces on a Makerbot Replicator 2 at 0.1mm with 15% fill and 100% fill for the plunger.

You will need a spring, which I got from a kids Pez dispenser for its form factor. The balloon membrane or rubber glove is elastic so you may get away without the spring but it is nicer to have it. You also need some tape to seal the gap, and a straw. It is designed for standard straw diameter (which also works with the standard pipette tip) but I can upload others if there is demand, let me know.


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