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Random quarter trick

Http:// Watch it in HD.

Topic by DJ Radio    |  last reply

Buying American Quarters

hey guys, i'm from Australia and am currently in the market for regular old American quarters to make rings and lockets and such.. seems currency exchange does not hold coins and ebay only sell prestigious ones so i am willing to pay direct exchange plus shipping for your shrapnel. kholdsworth27 at gmail dot com and thank you.

Topic by kholdsworth27  

Knex Quarter Arm Lift

My new lift is finished. It was already finished for quiet a long time but for some reason instructables was really slow at my comuter. The lift goes up and down from about 0 degrees to 90 degrees by using a crank which is powered by a motor. For the rest there is nothing special. I worked on it for about 2 weeks Here is a video of it Here is the parts list: Rods Geen- 55 White- 65 Blue-171 Red-2 Grey- 1 Total rods: 387 Connectors Dark grey- 26 Light grey- 0!! Orange-34 Red- 9 Green- 2 Yellow- 35 White-15 Purple- 124 Blue-83 Total Connectors:319 Others Blue spacer- 55 Silver spacer- 51 Red gear- 2 Blue gear- 2 Mettalic clip- 6 Tan clip- 6 Knex battery ppack motor- 1 Knex ball- at least 1 Total others: 112 Total: 818

Topic by CassisDude98    |  last reply

How do I determine if something is lead?

I found a hideously fake £2 coin in my change, I bit into it to double check and it left a noticeable tooth mark (also upon closer inspection the gold bits were rubbing off and it had an overall wedge shape to it). Because it's nice and soft and now worthless as currency, I thought I'd try that turn a quarter into a ring instructable with it. After only a few taps I saw a noticeable difference and it now occurs to me that it's probably made of lead. Bottom Line: - Dulled silvery metal - Very soft (can leave toothmarks if I bite hard) - Need a definite way to tell if it's lead before I attempt to make a ring out of it. I know it's not gonna kill me unless I keep attempting to take bites out of it, but I'd still like to know, thanks. (also I don't have access to any chemistry equipment for proper tests)

Question by madmanmoe64    |  last reply

bird launcher?

I need to make a homemade bird launcher (since i cant afford 200 dollar profesh ones.) all it has to do is make anything from a coin to a bird decoy at least 5 feet in the air.... anyone know of a good ible or web site that shows how to make one?

Question by redsuit09    |  last reply

How can I recive hand-to-hand and close-quarters combat training?

I want to learn usuage with combat knives, and fists. Some blocking teq's, more offensive punches/stabs/slice.

Question by PKTraceur    |  last reply

Is a series circuit with 12.08V and a 150 Ohm Quarter-Watt resistor safe?

I have a series circuit with 12.08V from a DC power source running through it. There is only one quarter-watt resistor at 150 Ohms. Is the circuit considered safe and why?

Question by jsrivera    |  last reply

half pipe

Do you want to build a half pipe because your local skate pipe has trashy influences then you came to the right place I'm working on posting this at the moment. I want to know about how many will use the instructions.

Topic by the_burrito_master    |  last reply

Bait & Switch

Thanks for the Bait & Switch.... Page prices for quarterly are shown as $3.95 per quarter. So I selected it, as it would be cheaper than the 2 year term over the same period. Got to checkout and it was switched to $11.95 a I was forced to purchase the 2 year plan....trying to save a few dollars on the subscription you know. Feel free to refund the difference between the $3.95 per quarter(advertised on your site)  for 2 years opposed to the $39.95 I had to pay. THANKS AUTODESK!

Topic by r4n    |  last reply

what are the best weapons in these groups: assault rifle, pistol, close quarters? Answered

I want to make a group of weapons with different uses, eg; assault rifle, pistol, a tazer, knife, close quarters. so what are the best weapons in these groups? thanx guys

Question by am wooly    |  last reply

I have a thermopedicfoam mattress topper that I want to cut into quarters . How to make neat cuts?

I want to make a bed for old dog by cutting the mattress into quarters. Any suggestions on how to bes make neat cuts in the foam. Its about 4" thick.

Question by BillFL    |  last reply

How do i make a pickup for my cajon to plug in a quarter inch cable? (Its a drum Box)?

Im wanting to know how i can be able to make my drum plug into a quarter inch cable to save me the trouble of using a mic. Meinl just came out with a pickup cajon. I need to know to to make one in mine.

Question    |  last reply

living in a streetcar?

Does anyone know where I could find pictures of streetcars/trams that have been converted into living quarters?

Question by porcupinemamma    |  last reply

Sensitive Motor?

Im looking for a small, no bigger than half a roll of quarters, dc motor that can be programmed to spin 50ths of a turn. it needs to have some power and not be super expensive, thanks for the help.

Question by theboygenius    |  last reply

A Dedication to Kiteman and Science teachers everywhere....

While he is STILL at Head Quarters I'd like to dedicate the following video to Sir Kiteman.

Topic by Goodhart    |  last reply

Knife concealment??

OK, i was wondering about how to conceal a knife, and i remember listening to Nocturnal podcast by Scott Sigler, and one of the gangsters had a knife in his shoe. i was wondering if i could hide a knife in my shoe like this:1. put the knife under that removable pad in the shoe.2. cut a hole in the back of the shoe that looks like this:|..................... | |_ _ _ _ _ _ _| |......................|dont mind the periods, they are just place markers.3. tie a string (fishing line) to one of the holes in the back of the handle, run the line through the above hole in the back of the shoe. 4. drill a hole in a quarter and tie the string to the quarter, then stick it in your pocket. when you need the knife, grab the quarter from your pocket, lift your leg with the shoe and knife, then pull it out. the way you cut it, the flaps will open and the knife will slide out, but will stay closed all other times. could someone please make an instructable on this, or tell me if it would work by testing it out?

Topic by A.C.E.    |  last reply

Honey Bee Hive Box Joints Template

Do any of you woodworking wizards or experts know how to make a box joint template. I need to replace many of my Honey Bee Hive Supers (boxes) due to Bears, time & weather. The wood is pine and about seven-eighths thick , five and three quarters tall or high, twenty inches long for the front and back, the sides are sixteen and one quarter long by five and three quarters tall or high. This forms a box that holds ten extracting frames for the honey in combs. It weighs forty pounds when full of honey comb wax and honey. I like this size because it doesn't brake your back like the standard one that weigh in at eighty pounds when full! Although I use both sizes. Any ideas how to make this template will be deeply appreciated. I also have a multiple dado blade setup, so I can cut a pretty wide dado at one pass on the table saw. Thanks. Triumphman.

Topic by triumphman    |  last reply

Am i allowed to go to the Instructables HQ? Answered

Even though i suspect Eric is a Robot?

Question by Yerboogieman    |  last reply

Antenna length for a frequency modulated signal.

I  am given to understand that the length of an antenna is proportional to the wavelength of the signal that is fed to it (a quarter wavelength, for example). In the case of a signal modulated by amplitude, the frequency (and therefore wavelength) of the carrier wave remains unchanged. However, in the case of a signal modulated by frequency, the signal fed to the antenna will vary in frequency (and, therefore, wavelength). My query is this : how would one go about calculating the length of an antenna for a frequency modulated signal? Its frequency is not constant, so to construct an antenna of say, a quarter of the wavelength, would be impossible. I thank you in advance for your assistance. AlexHalford

Question by alexhalford    |  last reply

My Silver Coins!!! What's it worth?!?

I am not too sure about what references to trust, so I want to check with you what all my silver is worth. DIMESTotal: 31 QuartersTotal: 18One is a 40% bicentennial proof. Another is a (I don't know why but,) silver bicentennial. HalvesTotal: 6One is a 40% bicentennial proof DollarsTotal: 5Lots, huh? And by the way, one of the dollars is on it's way from eBay, and another is a 1971 proof. Another is a 40% bicentennial proofPlease let me know if you can find the value, THANKS!

Topic by Flumpkins    |  last reply

Aside from clocks, watches, stores, and the internet, where is a common place to find tiny metal gears? Answered

Im looking for metal gears around the size of a quarter. anybody know where i can find some?

Question by TimTheScarecrow    |  last reply

Weirdest vending machine change

I got the most unusual change from a vending machine at school today. A Susan B. Anthony dollar, a James Madison dollar(I didnt know about those before), a Sacajawea dollar, and some unimpressive quarters.

Topic by The Ideanator    |  last reply

When will the "New Flash Uploder" be out of beta?

I've been on instructables for 2 and a quarter years now, and it doesn't seem like anything has ever happened to it. I use it all the time, and it works fine. No bugs that I've seen. Is it still being developed?

Topic by kcls    |  last reply

Low AC to DC conversion

Hi, I'm looking for simple way to convert a low AC into a usable DC, of say 4 - 5 volts for charging batteries. I recently saw one discussed online, specced at costing about a quarter, but couldn't find a way to do it, or a way to purchase something like that. Thanks!

Topic by fafnir665    |  last reply

How can I fix peeling paint in bathroom? Latex paint was put directly on new drywall without using primer under it. Answered

Paint is now cracking, then curling up in dime to quarter-sized pieces in about a 3x3 foot section above the shower in bathroom.

Question    |  last reply

Tiny Screens (Like LCD)

Im trying to make my own didgital watch that can show weather and all other stuff as well as tell the time. I need the screen to be cheap, thin, and a little bigger then a quarter (watch size.) Anyone have any ideas as to waer I can get screen this size?

Topic by Aerandirel    |  last reply

auto paint help

I am not in to paint jobs but really love to do good work and i know if some one gide me good i do very good job from my heart. need little info i want to paint my car rear quarter pannel there is little rust which need to be fix.and i have sanded the quarter pannel the silver body is show now i like to know after fixing the rust what step do i need to take?put filler or first spray with the epoxy primer to wont get rust then filler?and after spraying final paint do i need to sand the paint before clear coate or after final paint do i spray the clear coate straight away?

Topic by acura2.2cl    |  last reply


These napkin rings go well with the waffle coasters to create a set on the dining table. The colors of the magazines give it a bohemian charm. Finish the ring with lacquer for easy cleaning and durability.INSTRUCTIONS: www.projectfidgetyfingers.blogspot.comMeasure the length and the circumference of a toilet roll.Fold magazine sheets into quarters. Once cut into quarters, fold it into half and then 1/3 and ½ again. Measure the width of the strip and match it according too the circumference of the toilet roll. It should match, giving some allowance of the thickness of the strips. Work out the thickness of the napkin ring. We have measured out 1/3 of the toilet roll, including allowance for the thickness of the strip.Use glue stick to stick the strips onto the toilet roll for placement and ease of weaving. Weave and tuck loose ends into the square weaves.Finish with lacquer.

Topic by suzene  

How do you determine the length of an antenna and the size of a fractal antenna? Answered

In an instructable, the formula for calculating antenna length was given as "length in meters =300 / frequency in MHz".  The example given was for a Bluetooth antenna with a frequency of 2450MHz.  The antenna length was calculated as 300/2450 = 0.1225m = 12cm.  The author then divided it by 4 to make a "quarter wave" antenna length of 30mm.  Why divide it by 4 and what is the benefit of a "quarter wave" antenna.  What is the effect of the conductor leading to the antenna?  If the 30mm antenna is soldered to a 4mm lead, does that result in a 34mm antenna?  For a fractal antenna, should the 30mm length of wire be folded into a fractal shape or should the total fractal antenna be 30mm in width?  I have read somewhere that one of the benefits of a fractal antenna is that they are able to receive signals of different wave lengths.

Question by fcampbell    |  last reply

Cheap Power Conditioning Unit (PCU)

In the video released by the windbelt creator, he mentions that his PCU only costs about a quarter. I dont know if that is his mass produced price, or his off the shelf price, but does anyone have any ideas about how to make a PCU for say, under a buck?

Topic by fafnir665    |  last reply

How to fix a ipod scroll wheel that clicks when you slide your finger on it to do something (ex. change the volume)?

Stated above. i have an nano that when i rotate my finger around the wheel it makes click/tick noises when i pass the bottom left quarter of the wheel.

Question by Helpneeded    |  last reply

How to administer a tiny painful (but safe) electric shock...

I have no electronic's experience, but I need to develop a tiny device that can administer an electric shock for just like 1 sec that is strong enough to hurt, but is safe.  And it has to be no larger in diameter than a US quarter coin, and no thicker than maybe the face of a watch.

Topic by Dolmetscher007    |  last reply

What to do with dry ice

I have a little bit of dry ice and I can't think of what to do with it.I have alreadythrown it into the poolmade bubbles with itpointed my laser into itfroze a quarter in ita bunch of other things that I cannot rememberAny Ideas? I have an hour left with itNO DRY ICE BOMBSthey are illegal you know

Topic by n8man    |  last reply

make a daylight only wildlife feeder?

I want to create a feeder such as a tub with quarter inch mash on top and a motor in a timer that slides the mesh off at daylight and slides it closed at dusk. I want to attempt to train the local wildlife to show up during the day. a timer would work as well but I'm not sure how to set a motor to open and close the lid.

Question by tincupchalice    |  last reply


I have a very good coin collections my father left me.  I'm not really into coins, and would like to unload them to someone who has a good knowledge about coins.  He collected these coins while how was in WWIi.  Here is a description of what I have:   I have around 20 silver dimes that are so old, the dates have rubbed off. There is one dime dated 1907.  I have one Morgan dollar-date 1917.  I have several buffalo nickels.  I have the following silver quarters: 1952' 1954, 1947, 1942, (2) 1943, 1956, 1941, 1946, 1944, 1942, 1954, 1963, 1961, 1957, 1950, 1944, 1960, 1924, 1907, 1951, 1964, 1936, 1955.  I have several silver dimes, nickels, and quarters where the date has been rubbed off.  I have not "clean" the coins or "polished."  I would just like a "ballpark" amount of the coins I have....

Topic by wareaglesusanbf    |  last reply

Cargo Shipping Container (steel) 8' x 8' x 20' I would like to convert to living quarters. Any info on the conversion?

For the conversion I would need information on installing an entry door, windows, insulation, electricity, heating, wall board, plumbing ~~ sink, toilet, shower ect.  Any information would be helpfull. Thank you. 

Question by garrison111    |  last reply

Change Counts

A word to the wise: keep your pocket change! I have a normal sized red plastic cup that I put all my spare change in. It was pretty full...but not to the brim, so I decided to count it tonight. Over $50 in quarters - 65 all together! What a pleasant surprise for me. I'll have to get some paper rolls from the bank so I can cash it in!

Topic by Weissensteinburg    |  last reply

Does anyone know how to make a gumball machine that takes money?

I want to make a really cheap gumball machine that takes, say a nickel for small pieces of chewing gum, like the ones in a packet at walmart.  Either that, or does anyone know where to buy one?

Question by grooooovy    |  last reply

I've always given my art away. Now I'm ready to do a show but don't know how to price the paintings...

How do i determine the value of my work? I realize that makes me sound like a hack but I've just never had to put a price on anything. I've attached a detail from one of my paintings (it's only about a quarter of the work).

Question by jrehnke    |  last reply

How to calculate a Tesla coil semi spherical top load capacitance? Answered

I want to know if you can calculate the capacitance a Tesla coil semi spherical top load by calculating what it would be then halving it? Also if that is possible could you third it or quarter it because I am going to buy metal bowls for it and most aren't quite a semi sphere (a lot only go about 120 degrees)? 

Question by The MadScientist    |  last reply

How can I mount Bamboo without drilling/screwing into it? Answered

I want to mount quarters of Bamboo on the corners of a room in my house to give it more of a themed atmosphere. I'd like to avoid pushing screws through the Bamboo for aesthetic sense. Is there a good way I can mount the bamboo on the walls? The solution needs to be generally non-permanent, though I don't mind screwing into the walls.

Question by aarone    |  last reply

Tech Deck Skate Park (WIP)

I've recently started to build a tech deck skate park. The base is mdf (solid stuff, very heavy), and all the features will be made from wood with metal coping. The base is 36"x16" to fit on my desk. You can track my progress here: Let me know what you think, what you might change, and what you like/don't like. Also if you need any closeups of anything, I've got it saved in CAD and can post any screenshots you guys want. Also, here are a few questions I have for you guys: -The flat rails were easy because they were handles, but how could I make the rail on the stair set? -How should I cut the profiles (out of 1/2" plywood) that will be the shape of the quarter pipe? I need to accurately cut that radius, but I only have a crappy band saw, 1" belt sander, drill press, dremel, and various hand tools.

Topic by saturnv7890    |  last reply

DIGIFABULOUS 2014, Call to Artists for Juried DigiFab Exhibition

Hi, I'm writing to let you know about a digital fabrication show I am putting together that will be shown at the University of Minnesota Department of Art Quarter Gallery. I would really appreciate any help in getting the word out. I hope you consider entering, thanks!

Topic by Anthony Kling  

Can you make an ultralight, foldable outdoor toilet seat from metal?

I’m planning a three-month kayaking trip, and my old rickety knees ain't what they used to be, so I'm hoping to find an ultralight, compact, foldable toilet seat with legs, preferably a lightweight metal, if that's possible. I need for it to be lightweight because I will have to carry all my gear around dams, and I need for it to be compact so it will fit in the hatch of a kayak with the rest of my gear. Space is very limited.Can anyone here make something like that? And if so, what is the cost? I'm suspecting it's going to be cost prohibitive, but it doesn't hurt to ask. I’ve seen children’s portable potty seats that quarter-fold, so I'm wondering if it would be possible to make something similar that could handle adult weight. Is there such a thing as a lightweight metal? Potential Specs: U-shaped. Small. Not full sized. Half-fold or quarter-fold. It can have gaps to avoid pinching. Sturdy legs that won’t splay out with heavy weight. Legs about 8 inches long. Somewhat contoured for comfort, if possible.Idea for legs:

Question by GoofyChickens    |  last reply

I want to make a tiny hot plate

I am trying to make a hot plate about the size of a quarter to 50 cent piece. I am going to wire in a dimmer switch for temp control, I would like even heat so I dont know if nichrome is the way to go-I'd love to use some sort of flat type resistor but havent found anything on line that seems fesible. Also I would like to use a plug in power suppy. Any ideas?

Topic by yoss974    |  last reply

Can I substitute a vertical antenna for a dipole? (Also, how do I protect it from lightning?)

I have a project that requires a 87 foot long dipole antenna. Would it be possible to use a 44 foot long quarter-wave vertical antenna in place of it, to save space? And is there any DIY way to protect the antenna from lightning? How well do they work compared to store-bought lightning arrests?

Question by ElectricUmbrella    |  last reply

What are some batteries for low temperatures (-70C)?

I'm making a tiny space probe (pongsat) and I need to be able to keep the device powered at an altitude high enough for the temperature to be -70C to -130C. I am thinking that batteries rated for around -80C should be ok. Where can I find these kinds of batteries and how much would they cost. Another thing to make it worse is that it needs to be really small (size of a US quarter) and needs to provide from 3.3 to 6 volts.

Question by techno guy    |  last reply

I need a good airsoft primary, preferably automatic.

I have a few airsoft guns, a Swiss Arms sniper rifle that fires at 435 FPS, a crappy Crosman Pulse R70 that fires at around 115 FPS, and has a fried battery, and a UK Arms M4 carbine M- series that fires at 350 FPS, and I'm looking for another AEG with a good range, has good size for close quarters combat, fires at at least 350 FPS, and is in the price range of 100 to 150 dollars 

Question by Nerfgenius    |  last reply

Evidence of Time Travel!

I'm not sure how I managed it, possibly it's a result of running the washing machine, tumble dryer and my coffee machine simultaneously, but I appear to be posting from seven and a quarter hours in the future. Check out the image below for proof... Or maybe it was csharyk's fault?  He's interested in woowoo tech, maybe he pulled me in after something he did elsewhere / elsewhen? Update: it's spreading!  (second image) (I think I'll move this thread to Bugs) (If it's important, I made that screenshot at about 10:13am, UK time)

Topic by Kiteman    |  last reply