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Most likely internal electronics that prevent it from turning on when it doesn't detect a battery. You can use a cell phone charger if you need to. Most are 5V and 1-2amp.
Sun, Earth and Moon Model (Tellurion / Orrery) With 3D Printed Parts
Back Pack Quick Release Pins
Chimera: $60 DLP High-Res 3D Printer
Introduction to EVA Foam
You could always use a hacksaw to quickly cut the copper pipe. It won't be as clean as with the pipe cutter, but it can be easily cleaned up with a file.
Mold Making & Casting Class
Easy 3D Printing
3D Printing Class
Make awesome 3D geometry by programming CNC-code
Do you think putting a nut in a lathe would be a bad idea? If you started from the face and worked down inside the inner diameter of the hexagon it could maybe work?
Learn to 3D Print in 7 Days with 7 Awesome Projects
knowledge is power
Great -ible! I live in a 200 year old house, so our insulation is pretty terrible and all our windows are single pane glass. My bedroom is on the north side of the house, so it gets the least sun and is always the coldest room in the house. I was curious about a simple way to beef up the windows and this looks perfect.
Laser Cutting Class
You may not want the metals to cool down gradually, I don't know how aluminum or brass would react, but it could be a factor.
It should, if you cure it properly. You may still crack the mold, but if it has supports (such as the container you made the mold in) you should still get a good cast.
Woah. I know what I'm spending my next paycheck on.
Make a Retro-Ascot Neck Tie
3D Printed Orthosis Prototype (Not For Medical Use!)
It's holding up so far. There doesn't appear to be any residue from stuff burning. I just crumble up the mold, mix it back into my supply, and add a bit more water if it's too dry.
I'm with you, it's nearly impossible to find cat litter without added scents or "odor absorbing" crystals, unless you purchase online. In which case you might as well order powdered bentonite clay. However, I ended up grinding some that had the odor absorbing crystals and just filtering out the crystals through a screen. I used maybe 8-12 cups of cat litter and had more than enough clay for about 2-3 gallons of greensand that works perfectly.
How to Make a Flask for Green Sand Casting
Laser Cut Tenor Ukulele
Saw Blade Airgun Target
Paracord Ammo Pouch
Stun Your Friends With These Handmade Harry Potter Wands!
Micro 105 FPV Quadcopter - 3D Printed
Bacon-Wrapped Eggs for Breakfast
Laser Cut Settlers of Catan Board
Super Simple Settlers of Catan Board
Monogrammed Whiskey Gift Box
Make a takedown bow from skis!
Hand Sewn Pixel Shirts
6 Tips to building a better Cross-cut Sled for your Tablesaw
$1 Motor Driver Circuit For Arduino
3D Printed Earbuds
Baling Fall Leaves
Pogo Stick from 2x4s
The Ultimate Table Saw Fence
Concrete chess set for outdoors
Camp for FREE in National Forests
Homemade Sculpey Clay
Making Dowel Rods With a Table Saw
Woodworking Workbench: Sturdy, Inexpensive and Quick to Build
Make a Custom Bic Brander
$20 Portable Silkscreen Kit
How To Cleanly Remove Blackheads Painlessly!
DIY Kubb set
Stuffed Hobbes (with pattern)
Wine rack for a bottle and 2 cups out of pallet
Build a Lightsaber from the Plumbing Aisle
Simple Bottle Cutting Jig
Woven Wire Rings
How To Create Custom Shirts With Bleach
DIY EEG (and ECG) Circuit
The Only knot you need to know.
How To Make The Mini Metal Foundry
DIY 2$ Dremel Router Attachment
Acrylic bow sight
Arrow Quiver 'Drop Leg Style'
DIY Sand Blaster $50 in an hour
Wooden Toy Hauler ***Updated with template PDF***
Leather Plague Doctor Mask
Steampunk gas mask
3 piece solar powered LED
Drill press for ~$20
How to make molds
Vacuum Former at Home
How To Extract Gold From Electronics
Molten Paracord Pendant
Make a Cut-Out Valentine Card
Smoked Tuna Salad
Science Fair - Articulated Hand < $20
Simple Animatronics (robotic hand)
How to Make a Soup Can Forge
Gangnam Style Paper Machine
Build Lifesize Space Marine Armor in 352 Terribly Complicated Steps
Homemade Wooden GoKart
How to Make Lavender Lemonade
Zinc & Copper Pendant
Woven Ring Pendant
How to make a Vintage Locket
(w/ Video) Basic Arduino Robot, Light Seeker!