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If you are doing this project "for the exercise" then have fun. But if you just want an 18 v drill, may I suggest a new one from harbor freight? It's probably not Quite as good as a new ryobi, but is probably as good as a home brewed frankenstein drill. And it costs about a buck more than the motor you mention. And it comes with a battery.
you might wanna check the specs on the motor that came with the drill. Maybe it's already rated for more V.
what about a faster method of applying epoxy? Like spreading a thin layer on a scrap board larger than the maze, and dipping the maze onto this all at once.
cnc router may b better.
What shape are you cutting? Folk on this site may have alternatives.
Mold Making & Casting Class
Secret Drawer Lock
I've done this before. Maybe I'll do an ible.
Simpler to weld a narrow blade to the right length
Can you get narrow blades for curved cuts?
OptionSolvent welding cement for acrylic.
options. UV cure. Faster application method. Perhaps apply epoxy thinly to a sheet of scrap plywood, press this board against the maze, remove ply, and apply plexiglass. ,
for the past few years, scrapers, wire brushes and such have been sold to b attached to the sawzall. When I first saw this I said "why didn't I think of that??"
http://www.google.com/patents/US4989287The bottom of this page cites roughly 100 patents related to "electric toothbrush" from 1939 to 2016. Check to see if anyone beat you to it.
use ually when eye you'se bad gramma, eye kno it, and I coulda. It snot that I can't.
might b a bit dry. For an oven u mostly want heat, not airflow.
heheh. Save power. Use leds in your easy bake oven!
some vacuums hav a separat motor for th brushes. A switch is an option here. Some vacs hav 1 motor for everything. These typically hav a drive belt to the brushes. Removing th belt is an option for these.
how hot is the tap water at school? 60C is possible. Fill h2o bottl with hot, put in an insulated bag with yer chocolate bread, wait.
does your school offer chemistry? Metal shop? Home ec? If so, there may b othr options for heatin stuff. Hehehehe. Seriously.
Victoria. Australia, I assume, not canada
iirc, the easy bake oven used a 100w light bulb.
USB is 5v. 2 AA batteries will be 3v.
good idea . ive worried about that, too.
a bit ambiguous directions re: gluing 1end and screwing the other. also, what glue didja use?
https://www.instructables.com/id/PVC-Pipe-Battery-H...Funny that I got mine published a day after yours. I've procrastinated publishing for ages. I'm not sure if mine will work well with normal cells. The strips that hold my re purposed cells together kinda act as springs. Maybe if one had your spring at 1 end, and my nail at the other, it would be the best of both worlds. You've gotta cut yers open to replace cells having glued the ends. Mine is a simpler build, and easier to take back apart.
https://www.instructables.com/id/PVC-Pipe-Battery-H...Here's a 4 cell case for these cells.
I hear ya. I'm just struggling with the compromises between perfectionism, "gettin 'er done" and getting back to responsibilities.
All transformers are, but in this case, applying 9v ac to the 400 turn winding will produce some milliwatt output from the other winding.Is milliwatt output the purpose of a tesla coil?
probably close enough.The "primary" and "secondary" labels i would switch. Primary is incoming V. (9V in this case) The secondary, in this case will be the approximately1000V output.
Youre calling the primary the secondary, and vice versa. Your schematic indicates a 12v battery, but the build uses a 9v. Other than that, cool project.
I'd probably put a pair of the mini vice grips on it. Or use a hole saw to cut a disc out of wood or plastic. Force this over the post so it grabs it, or heat plastic disc before forcing it over the post, or epoxy it.
I've just missed deadlines lately for contests, and just plain don't get my hobby projects done when hotter priorities happen (sigh).
sometimes I put together an ible that I kno has shortcomings, but I publish in a hurry. Is it preferable when I hav time to scrap the ible and start over? Or to re edit
I look forward to seeing what happens. Sometimes it's better (quicker?) to try somethin and see what goes wrong.
if u hav a snorkel and air pump, then minor leaks around the axles may not matter. As long as the air pump can keep up with leaks.
I know someone who used leyden jars in the primary circuit of a tesla coil. So, IIRC, they were charged by a neon sign transformer. Be careful with that stuff, tho.
thx Sam. Yes those are the 2
Rechargable C-Cells from De...
PVC Pipe Battery Holder
van de Graf is basically static electric automated. U can also just charge it with static electric sparks. But it might take 100 sparks to charge it.
van de Graf generator would b ideal.
The electronics need to be sealed against water. The motors are not entirely critical. Yes water will shorten their useful life, but not as much as you might expect. Meanwhile, You've got an awesome toy nobody else has. Your antenna could be quite long to break the surface if need be. Reception may be better if the wet part is insulated.
I'm gonna play devils advocate with ya soon, du35m. When I've a real computer in front o me.
I'd do an image search on what has been done in the real world. For inspiration if nothin else.
If you want realistic results, then, yes. Joints. How much tensile strength does gel have? Bet you could pull an "arm" right off. In the real world, that'll probably take 1000 lbs.
http://www.sciencedirect.com/science/article/pii/S...I Googled ( tensile strength ballistic gel) got nothin much. Compressive strength, yes. And that seems to be mostly there with higher speeds (1000fps, for instance) . But a real body has tensile strength, too.
if I were to build what you want in full scale, I might secure 55 gallon drums along the edge of the veh, with provision to pump air into the barrels for floatation, or flood em.
I assumed you can't afford a real tank, but if you found/ made scale 55 gal drums for floatation, it could look real. And cool.
agreed re: floor level. Hot glue may pull up paint. Try safety pins into the carpet
iirc, poplar is a good approximation for strength of bone. A drawknife is good for roughing out a shape. Belt sander to finish. Nylon is a good sinew. If you want realistic strength and flexibility, tensile strength in joints is a must.
iirc, real tanks just have a snorkel. Not floating, they just drave along the bottom.
it could be a matter of a "dirty" power supply. If V fluctuates from 0V to 7V at 60htz, with an effective avg of 5, maybe that's not good enough. Add a capacitor or battery.
Take old batteries to a car parts place. They'll give you a receipt which is good for deferring cost of a new battery.
Googled cost of lead. About 10 cents a pound. 3 batteries might net u 10 bucks.
there are power supplies which cap current rather thanV. I don't recall how they work.
sometimes it hits 0F. Or... um... -15 C? The silicone in earplugs seems to be semi-cured. So it's halfway between goo and rubber.
silicone earplugs are kinda weird. Like half dried caulk. Sorta like caulking your ears. Used by swimmers, they keep out water as well as noise.
any ideas on the freeze protection box? Sometimes it is food, or water bottle or paint for a job. Gets old taking it out of the car at night.
Colorado. recently in the single digits. It will get colder occasionally.But then there was today. 60F!!
http://www.digok.com/p10041142-new-electric-travel-cooker-hot-plate a ceramic mug on a hot plate may crack. but you should be able to boil h2o.
You could spend $___ on the high tech way, or $___ on some plexiglass. I don't know if the plexiglass would work.What I can say is that a thin pair of knit gloves keeps my finger from working.
Yeah, that would open the door.
when in doubt, clean + lubricate.
dig up the specs on the led strip. How much current? Look for number of m A. You are using 8 AA Batts, yes
agreed. 24 v DC can't be that uncommon a need. Should be moderately common.
is the red color the important part? Or the amount of heat? Or...
Boiling the h2o before use may get rid ofsome bubbles
Golf Ball Puzzle
21 letters as far as I can tell. Substantial repitition of those.
try putting a sheet of plastic over a touchscreen. If it is thick enough, your finger won't work. I think a stylus will work at a greater distance.
whats the tolerance of the floor beneath those legs? ;)
buy a manufacturedmanufactured flashing led.
yup. google "flashing LED. "
try a piece of clear rod as a lens.
or repair the old handle?
mythbusters collection 10 episode "paper armor"Results: good protection against slashing, stabbing, field tip arrows, and a flintlock pistol. It failed with a 19th c revolver, but so did the steel armor. Steel armor 2x the weight of paper. Approx 30 thicknesses of paper. (folded)
using it "wrong!".
breaking bad did.
how much current? What are u powering?
http://www.daviddfriedman.com/Medieval/Articles/Perfect_Armor_Improved.htm. I suspect that back in the day, armor may have been rawhide. Why bother tanning it
it sounds like a defective outlet. Or corroded plug. Too much resistance in the outlet means that it acts as a fuse. A slow blow fuse. Probably not an issue with the appliance itself.
ok. I was getting ridiculous. I'm inclined to think that putting the safety device in the appliance is best. If you'd like to plug a 1500 watt space heater in, or a 15 watt soldering iron, and have the outlet determine overheating (not excessive current) , well, you've got a serious engineering challenge. It's also interesting that, as a filament grows hotter, it's resistance goes up. Thus current goes down. So, if the outlet checks current, it may miss an overheating event. Another option might be to hook a smoke alarm to a wireless transmitter which shuts off outlets if smoke is detected.
Probably. BUT.. The best approach is likely to find out how much current the LED draws. If it isn't printed on it, you can get a multimeter for $0 to $20. Hook it, and the LED up to your car battery (or some other complete overkill voltage source) and find out how many milliamps it pulls. Then you can compare numbers.
amp hours is part of the equation, but amps is another. If the battery doesn't get hot while powering the LEDS, then it's fine. If your not certain of adequate amperage, then hook batteries in parallel.
A breaker in an outlet could limit current.Or it could have an IR thermometer which could be aimed by the user at the appliance. This thermometer would interface with a computer which would shut off a relay when your coffee was warm. or maybe after the coffee maker bursts into flames. or you could spend more on a good coffeemaker.
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