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120 w / 12 = 10 A3000 mah is 3 amp hoursSo, downunder isn't _quite_ right in his math. Amp hours aren't the same as amps. _IF_ the batteries can run the amps, they will last 3/10ths of an hour. (time spent on). Short answer: use different batteries or different heater.
how big a vat of liquid? Why batteries not household power?Sterno?Other options?
iirc, gelatin can be made much more concentrated than by the directions.
step 1. Are the batteries adequate? Look for amps, watts, and amp-hoursOr milliamp, milliamp hours. printed on the heater and batteries. Post info here.
diamond drill bits.
once bent into shape, I suggest hardening, tempering, tumbling to polish, and copper plating them.
I can suggest a machine shop in denver.
the pneumatic tyre
Acquaint yourself with someone in a machine shop.Perhaps a trade school. fairly simple task with the right tools and knowledge.without the expensive tools, I would use a carriage bolt, a fender washer, a drill, and a hacksaw to make that hardware.
staple canvas over a wood frame. Either taut, or with a bit of sag like a hammock. with only a single layer of cloth, it should be cooler.
you might try unflavored gelatin in ziplock bags. Not sure if it will spoil. Perhaps a lot of salt will preserve it. Also not sure if rodents will wanna eat it.
cool! have u tried using it to power somethin? (I havent been able to see the vid yet, so, apology if its on vid)
If you use an office chair, could the switch be in or alongside the column? Those pneumatic cylinders typically give a bit when u sit.
+1, framistanive seen a galvanized can lined with plaster + sand for a foundry the zinc seemed to stay cool enough on that not to burn off.
maybe a mesh seat like lawn furniture uses? Breathable.
if u find tubing. That fits snugly over another size tubing, that's an option for diy couplings. A 2 inch long coupling won't be as stiff as a 2 foot one.
both soda bottles and pvc are bad ideas for compressed air in my experience. Details later.
I've had 2 soda bottles rupture on me. Have experienced 1 catastrophic failure with pvc and air,I personally know people with 2 other pvc failures. Pvc shards are sharp. Don't depend on luck. 30 psi is probably OK, but...
I would remove the spring before soldering the 2 tubes together. Didnt the heat wreck the spring?
why is this in the "untouchable" contest?
cardboard + hot glue + spray paint.
after reading the title, I took a second, then a 3rd look at cover pic. Only then did I notice soft focus on blue car, and a different POV of the trees as reflected in the 2 windsheilds. If ya havta look thaty close, ya desreve to see Somethin, right?
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https://en.m.wikipedia.org/wiki/Girandoni_air_rifleI'd not recommend fabricating your own unless you are an excellent welder.
sounds good. Get polarity right.
connect wires between the base and the tool. If the batteries are truly useless, pull em out and recycle em at Home Depot, Best Buy, etc.
https://www.amazon.com/dp/B00T6CKSGY?ref_=pfb_4edd48ldmg0g0bkb8bghd0fd70a9&tag=hydfbook0e-20&ascsubtag=pfb-P01-V02-O2-T1-HI-4DCJUB or get /make a bushing.
can u run it with it plugged into the charger?
I've discovered that it is often cheaper to buy a manufactured item than to buy the materials to scratchbuild it. Nonetheless, "off the shelf" frequently does not fit my needs. There are times too, when i don't wanna waste my efforts on worn out materials.
try searching uspto.gov. or onlone manuals with diagrams.
i , too was thinking ball detent.
there is a camera on the market which follows a subject. I don't know how. perhaps learning how this works will give you ideas. infrared? ultraviolet? radio frequency? I don't know.research and share what you learn.
"VOID YOUR WARRANTY" Contest. :D
I just got a cube at thrift store . will havta try this
I'd like to see the steering mech kept below the deck. Sooner or later, the sled will stop while rider continues on.
possible solution. Get a little electronic blood pressure cuff. Gut it for the valve. 3v. 3 mm.
I try not to re-invent the wheel if i can help it. So, yeah. Shoppin is good.My French aint so good, so i ran a googletranslate.neither of those is CURRENTLY available. But maybe this is an indication that french speakers buy and sell this more often.3mm to Tube 3mm Gas Solenoid Valve Solenoid DC 5V 0.4-0.5kgf / cm2 From DealMux Be the first person to comment on this article Currently unavailable. We do not know when or if this item will be back in stock. Product Name: Electromagnetic solenoid valve; Rated voltage: DC 5V; Current Rating: 263mA Stroke Rating and Strength (Min.): 0.4-0.5kgf / cm²; Max Power On Time: 1 Seconds (Max): 0.25 "x 0.39" (L * W * H) Electrified rate: 10%; Mounting hole connector: 3 mm to 3 mm External Material: Alloy, Electronic parts; Main Color: ...see more »I try not to re-invent the wheel if i can help it. So, yeah. Shoppin is good.My French aint so good, so i ran a googletranslate.neither of those is CURRENTLY available. But maybe this is an indication that french speakers buy and sell this more often.3mm to Tube 3mm Gas Solenoid Valve Solenoid DC 5V 0.4-0.5kgf / cm2 From DealMux Be the first person to comment on this article Currently unavailable. We do not know when or if this item will be back in stock. Product Name: Electromagnetic solenoid valve; Rated voltage: DC 5V; Current Rating: 263mA Stroke Rating and Strength (Min.): 0.4-0.5kgf / cm²; Max Power On Time: 1 Seconds (Max): 0.25 "x 0.39" (L * W * H) Electrified rate: 10%; Mounting hole connector: 3 mm to 3 mm External Material: Alloy, Electronic parts; Main Color: As Shown Image Package contents; 5g: 1 x Solenoid Solenoid Valve Weight
Is this meant to prevent accidents? Like proximity brakes on a car? Keep someone from driving wheelchair into a wall, pedestrian, etc?I apologize if I haven't read thoroughly.
here's a little insight into what is already out there. a 24 volt valve will run on 12 volts. the solenoid takes a quarter amp at 24 volts.This is current which is drawn as long as the valve is open. Can you afford that current with your batteries?with a Servo motor there would be zero current while the valve is open. only while the valve is opening or closing will there be current demand. option : use a servo to pinch a piece of soft tubing shut. This is your own valve and very simple. It should work fine for low pressure water.
I imagine that if 100 million people wanted this, it would be available off the shelf. Meanwhile,http://hackaday.com/2014/09/27/automated-watering-system-uses-neat-diy-water-valve/I've seen some factory pinch valves. some don't list required voltage. One valve I saw needed 24 v and was $150. I think that was medical equip.
I look forward to it. I have seen pizza ovens in which fire and bread are in there at the same time. I have also seen bread ovens in which the fire is removed entirely before bread is put in. residual Heat in the Stone Cooks the bread in these. There was 1 oven which was so hot that the surface of the breadburned while the inside was raw.
or. Replace the solonoid return spring with a lighter one. I do see 5v servos online. Use it to pull the solonoid piston. How would one rewire the solonoid to pull just as hard with less than 1/2 the V? Actually, test 1. Will an unmodified 12v solonoid open with 5 v?
how high is your gravity feed tank?Is the water in the tank cleanYou are using 6mm tubing?How far does the tubing go?
I read a theory about pottery. Adding organic bits and pieces will be like drilling a hole in a windshield at the end of a crack. it prevents the crack from spreading. If the clay was too solid, a crack would go all the way through it.
Nice build. Maybe a tutorial now on baking in it?
Nice build. Maybe atutorial now on baking in it?
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Cob Bread Oven, Back Yard Sourced!
Wood? Look for ibles on wood turning. Or even whittling.
when I want a coat hangar to be more pliable, I toss it in a fire to anneal it. This could also be done in an oven, but plastic coating will be nasty there.
If you've got time, maybe you could amp it up to 50V!!!(that's the max that osha considers safe in the rain, and such)
a saber saw is another option. People also do circle jigs with those.
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.
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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.
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