Search for bell in Topics


BELL RINGER

NEED YOU HELP!! To all you out there...I have a FARM BELL..cast iron..I'd like to rig an electric motor with timer that would pull the rope and ring it every day at NOON. THANKS!!

Topic by mbernardoni    |  last reply


david belle

If any of you do parkour you would know who david belle is he is basically the who made parkour big here go to this link to check him out/ david belle is the one who has to get away/http://www.youtube.com/watch?v=TPIw3cv8Zls&feature;=related

Topic by monkeyman123    |  last reply


BELL RINGER

NEED YOUR HELP!! To all you out there...I have a FARM BELL..cast iron..I'd like to rig an electric motor with timer that would pull the rope and ring it every day at NOON. THANKS!!

Topic by mbernardoni  


ring my bell?

I have a switch and when it is opened I want to activate a bell for a second or two. I don’t want the bell to go off again until after the switch has closed and opened again.  What would be a good solution to this?  I’m guessing some kind of relay board but not sure where to look for this.  My bell is 120vac and switch is low voltage DC.

Question by wannab1    |  last reply


antique school bell

OK, i got this antique school bell, i think the date reads 1898 idk its got a little surface rust, i saw this thing sitting on a shelf, and i thought to my self  "how awesome would that be to be hooked up to a door bell" but no matter how hard i look i cant find clear instructions on how to, and what i need to make it work. Ive put some power on it and the hammer just stuck to the coil instead of bouncing back forth. are there any antique gurus who can help me with this issue?   thanks :P

Topic by golddigger1559    |  last reply


Looking For A Bell Jar

Hello, I am a high school student from Boston, MA looking for a bell jar and corresponding stand/vacuum connection to conduct my experiments. I'm not looking for anything in particular, so long as it's not plastic (it will need to withstand some moderate electron bombardment). If you have anything, even if it's only something you can only lend to me, I am interested! Thanks! Xellers

Topic by Xellers    |  last reply


How to tune a bell ?

I'm building a doorbell-operated carillon of bells, which will play the "Westminster Chimes" on a set of real brass bells (the sort with a wooden handle that you would normally shake). They will be hammered either by solenoid mechanisms, or by mechanical triggers, driven from a pinned rotating drum. My question is - Is it possible to change the pitch of a bell, either by removing metal, or adding metal (with a weld), without ruining the resonance or the tone of the bell ? - And upon what part of the bell would you perform this action ?

Question by and7barton    |  last reply


Problem with wireless bell

I am in confusion. Actually i have a wireless bell but of shorter range. So i thought to extend its range. I want to add one more pair of receiver and transmitter in the way. So when bell button is pushed, transmitter will send to receiver and receiver will complete circuit of transmitter and another signal to other receiver of bell. So it will double the distance. If it is possible kindly help me out. I am new in this field so explain me and tell which parts i need to buy. Thank you.

Topic by RollingS2    |  last reply


Which bell peppers are better for cooking ,and or eating ,three lobe or four lobe?

I would love to learn the differences between three lobe and four lobe bell peppers

Question    |  last reply


Why can't I login to instructables after I try to find an Instructable?

I can log in fine from my Chrome opening pages but when I try to find an Intstructable project I am logged out and cannot log back in.

Question by timeman2    |  last reply


How to make a Butter Bell?

Butter Bell keeps your butter fresh out of the fridge. How to make this myself? Ideas how to make it not using pottery? Help with doing it with pottery?

Question by Miqel    |  last reply


LED Lights on a trombone bell.

Well anyways, I'm planning on sticking a circle of little LED lights on the bell of my trombone. It would have two modes, one that lights up with noise, and the other just staying lit. I plan on using the circuit from https://www.instructables.com/id/LED-Music-Sync-Lamp/ but I need a microphone circuit and a switch added in to do the two modes i described. So could anyone sketch something up quickly? Thanks.

Topic by emuman4evr    |  last reply


How to get this bell to work? Answered

I picked up this bell today at my local junk store for 50 cents. I hooked up a 9 volt to it and it rang once. Is there a simple way to make it ring a lot when i flip the switch? Thanks

Question by schoonovermr    |  last reply


Bell linked to cell phone

I have this school bell in my shop that is hooked up to my land line. I could always hear the phone ring. I have not had a line for years now. Is there a way to connect my smartphone to the bell? I would just want it to ring if I get a text or call.

Topic by urbanmx    |  last reply


gas station-type driveway bell?

 Any thoughts on how to rig up one of those bells that dings when a car drives over it, like at a gas station?  We's love to put one across the end of our driveway...

Topic by sarahfish    |  last reply


How to make a lab vacuum chamber

I have just buit this vacuum bell jar system form several sizes and with electrical inputs: http://www.youtube.com/watch?v=O91eCB_GvwY

Topic by bubal    |  last reply


What is that called??

What is that called? What is that thing called-there's a looped wire between two planks of wood and we have to bring another wire with a ring in it to the other end.You know what i mean??please help.i want to make it for my physics project.?

Question by Birdielicious    |  last reply


Doorbell Issues

I have a problem with my doorbell, and it's driving me insane. A couple of weeks ago I decided to fix our doorbell, one that has not worked for a very long time (decades). I replaced the grommets that go on the tone bars. I cleaned the plungers and everything. It worked just fine, until about a week ago. Sometimes it will ring, sometimes it's very quiet, sometimes it doesn't ring at all, and sometimes it will do a short ring (the ring doesn't last very long, like it used to). Also, it is about 40 years old. Another thing, the switch is rated at 16V, and I'm using an 18V doorbell, could this cause the circuit to not complete properly? Here is a picture of it (cover removed) I thought by putting hot glue on the grommets would help, but it didn't. The pic shows the glue, but now it is removed.

Topic by popit    |  last reply


Usb eMail indicator?

Hi, I am looking for a no circit( or chippy thing) usb diy eMail indicator. I would like it to light up a led and ring a bell.

Question by Warlrosity  


Where can you buy 49cc clutch bell springs and clutch bell arms? Answered

I need three clutch bell springs and one clutch bell arm for a 49cc engine?

Question by camping crazy    |  last reply


I am looking for information on this bell Answered

I have four bells like this but not sure what they are for

Question by ffilc    |  last reply


does having a tuba on its bell for long periods of time flatten the bell? Answered

I was wondering because the 7 tuba players at our school are pretty lazy(i included) so after the class we usally just leave them upside down on the bells for the next class.

Question by tubanator-2.0    |  last reply



A Use for old Bell Satellite Dishes?

We have a few old but working Bell Satellite dishes with LNB with them. We are an amature Radio operator and wondering what we could do with them??

Question by emit    |  last reply


Bell Ringing (or Light Flashing) Circuit

There's a dead simple circuit which I've built before, but can neither remember, nor find online. Just a capacitor, relay, and a few resistors to make a circuit which flashes on + off. Can anyone here find this, or re-recreate it?

Topic by Toga_Dan    |  last reply


Ring a bell? (Special event for British members)

The Olympics are coming, and although I will miss most of it, it would be cool if I could take part in some way. It turns out I can, and so can every other Brit reading this, in an event called All the Bells. The short version is, on Friday 27th July, at 08:12am, UK time, as many bells as possible, from doorbells and bike bells, all the way up to full cathedral bell-towers will ring, all across the United Kingdom. Taking part is easy - just stand on your doorstep and press your doorbell - but why not go the full hog?  Are you in a cycling club?  Get them all out in the street, ringing their bike bells. Live near a church?  Even if you're not religious, get in touch and get them involved. Go to school?  Talk to the music teacher, borrow the hand bells or the tubular bells. Are you an engineer?  Hang up the biggest lump of steel on the site, and beat it with a hammer. Heck, just get all your friends to set an alarm on their phones and iPods with a bell-tone at 08:12, or turn up your PC speakers and play with sound effects. Pass the website around your friends and contacts by Facebook or Twitter, put a poster up at work, add graphics and links to your blog, and generally spread the word. [BLOGGED]

Topic by Kiteman    |  last reply


Extend a wireless door bell. Current distance is about 160m open air.

I am looking at extending the range of a wireless door bell. I currenly have a range of about 160m open air but would like to make the distance longer. Does anyone know how to do this? Do I mod the transmitter and the receiver?

Question by byoung1312ad    |  last reply


would a clutch bell work as a spindle for a motor bike?

I have a weedeater with a clutch on it and i want to make a motor bike as simple as possible and i am asking if you could use the clutch bell itself as a spindle for a friction drive motor bike if so i could probably build one in about an hour and also if so, where on the clutch bell would be best for contact with the wheel, the bigest part closest to the motor, or the smaller part of it farter away from the motor

Question by BIGHAIRYDUDE    |  last reply


LG Rumour 2 (Bell Network) ringtone troubleshoot

Hi all, I just recently got my hands on an LG Rumour 2 (Bell Network). I was happy until I realized that I couldn't upload my customized ringtones. Is there a way for me to hack into my cell phone or work around this? I'd really like to be able to add my ringtones without paying for them.

Question by sweetridecaddy    |  last reply



Triggered arduino bell system, code problem.

I need to pick a random .wav file from a sd card to play when triggered by the master clock. Also, I have to play a tornado warning file when the when the master clock sendes 3 short signals. It might go somthing like this, 'TORNADO WARNING, PROCEED TO SAFE ROOMS' in a computer voice.

Question by Tuddel68    |  last reply


Regarding the DIY music box... Answered

I was considering getting the DIY music box www.thinkgeek.com/geektoys/science/8f7f/ at thinkgeek and I'm wondering if there is a website with song blueprints and if I have to buy special paper to use for it.

Question by Fizzxwizz    |  last reply


Where can I purchase the plastic adapter for sealing Bell jars?

I have the evacuation device but need to find the adapter to do the job of vacuum sealing Bell jars.

Question by L Kirchmeier    |  last reply


Animal Crossing WW for DS

If this is against the instructables policy, let me know. I am starting an animal crossing WW friend code board. I will post mine shortly. Thank You.

Topic by King825    |  last reply


how do i make this work????

I got this from an antuiqe store and i want it to work. when i tryed to hook it up in stead of loosing the contact when the hammer struck the bell, it continuously held the magnetic pull. any thoughts????

Topic by golddigger1559    |  last reply


how we can adjust the frequency between remote and receiver of a door bell ?

Http://www.dhgate.com/product/digital-cordless-36-melody-songs-doorbell/131166817.html how we can adjust the frequency between remote and receiver of a door bell???

Question by HaR2    |  last reply


The Moon - What do we really know and what is possible?

If we look up then seeing the moon is the most normal thing to us there is in the sky.But did you ever wonder how it actually got there? ;)Theories are out there by the lot, including those from real scientists.One of the most common is that it all started by catching the thing and that all was perfect at the time.Over time the orbit then stabilized.Other theories include that formed when our planet formed..What they all lack is what is common and true for all other moond out there: These rotate.According to science an object the size of our moon would need to rotate to maintain a stable orbit.No one told this to our moon, so it just stays in a stable orbit anyway.The only other accepted theory, that funny enough never mentioned OUR moon, is that the center of mass must be facing the orbiting planet.Now theories can run and wild if you let schientifically people loose on a subject.Official NASA data obtained by monitoring equippment on the moon supports the theory of the center of gravity.You see, sesmometers recorded "moon quakes" but also the impact of burnt rocket stages - the later were dropped on purpose.At first everyone agreed the equippment must be faulty but going through it again and again confirmed all works fine.So what got them so exited that was never officially made public?You see, every thing with suffient mass will create a sesmic shock on impact.On earth we can located the source of an earthquake or even explosion quite accurately.Same happened on the moon only with one difference to earth.Every impact caused a ringing effect.Like a bell, the soundwaves and shockwaves traveled through the moon for very long times.An early explanation was that the moon is made from really hard rock or that it might even have a metal core.This was rendered useless once the actual mass was calculated and it turned out the moon would rip us apart while spinning around us.The term "hollow moon" was born.Another interesting thing happens when you try to track down what equippment was left on the moon during which specific mission.Everything up there must have been installed at some stage.For some things though it seems there is no record when or where exactly something was left up there.Then there is the thing with the interviews...If you check the fuzz about the first moon landing then back then you couldn't help yourself but got exited as well.None of the three astronauts however appeared to be at least a little bit exited about going where no man has gone before.Somehow like visiting Iceland for the first time only to realise someone was there before you already.But it was the moon, not some easy to reach island...And while up there we did not see any exitement either, like fully staged and planned ahead.Like a not so 100% school rehersal.Claims that it was a fake and actually filmed in some studio have been verified to be false - they really were up there.After they came back two went silent and refused any interviews about the moon.All three though never spoke about anything we did not see on "live TV"...All the missing segments, the drop outs, the silence during communications...The money...Apart from the Pentagon making a disappearing act of 6Billion US, the already planned and staged moon missions were cancelled with no valid reason at all.One mission already ready to go to the launch pad, crew fully trained and briefed.Two more ready for final assembly.Official reason back then was "We have been there, it is time to explore new things."Almost the same statement was made by Obama a few weeks after he claimed "We will go up there again!".If you take away the costs for the abandoned missions then the money blown up to the moon has a huge difference to what can be tracked back.The lost sum equals out to about 8 more moon missions plus tons of state of the art equippment (back at the time it was state of the art).If you add what the Pentagon lost we are close to 15 more missions.The now...A few years back a lot of previously declared top secret documents have been released to the public.What was a good idea however turned out to be a bit too much.Quite a few documents were included that provide missing links to "incidents, missions, money spent"...Within these piles were documents indicating that space missions of the same extend as the much later moon missions were made.Same rockets, similar crafts, same requirements for water, food and oxygen, some though with just payloads of oxygen and water.Mind you though the documents speak from proposed options and not planned missions.And none of them had any exploration within it, just deliveries if you don't mind the comparison.Those documents about the ringing of the moon and how this would impact on the things we assumed to know about the moon were in there as well.What is really interesting though is what came back from the moon.None of it actually indicate that there is suffient ressources up there to justify mining.Funny enough exactly is planned on a military style.Seems fair enough considering the military can provide the best people for such a hard job.Some normal miner might have no problems getting under ground every day but knowing he is on the moon and might never make it back is another.With all the probing done that we know of you would assume the planned mining operations would be in an area rich in minerals, metals or at least something to generate fuel or oxygen.But no, it is planned to happen "on the dark side" and in an area that appearently was never explored in other ways then taking a few blurry pics while flying around the moon.However, both Russia and China claim to have been very close to this area long before details about the mining became public.And that brings us back to the past and what astromauts stated or to be precise refused to confirm or deny.In some videos we can see movements in the background.In several adio stream we hear the comments to what happens in the videos.If there is light moving around then it does not matter that is blue.You just wonder what it is and where it might have come from.Imagine the surprise if then in other videos you hear things like that the lights are back or that steam comes out of the moon like a gysir.There were official explanations for the first sightings made by the normal people when watching those videos on the NASA websites.Soon after the videos disappeared from the servers.Copies were made by the curious and quite a few videos were identified later to have contained "sightings" as well.Some even show what appears to flying machines with great manouverbilities.And if you take the high point of the happenings then it is also the same time when it was decided that we actually have no real interest in the moon.Astromauts later denied to have ever made any comments like that they are being followed or "escorted" by another craft.And the same Astromauts many years later still refuse to deny or confirm that what we could see and hear during their mission videos actually happened.Don't get me wrong but if the deny it then it just means we all saw some refections or such things.If the confirm it then we know something was out there with them.Doing neither usually means what we saw is ture enough to deny any knowledge about more details.Why then the sudden interest?Trump wants to get up there, military mining, private companies not to forget China.If there is nothing at all up there then why would they all spent money that could provide a much better living for those with low incomes?Even if it would be just for new schools and hospitals the money would be better spent if we trust the official claims about what is up there.The not so official claims....We already know NASA does not want to come with an official explanation why the moon sounds and reacts as if it would be hollow.Same for any video, audio or picture evidence indication there is sturctures on the moon or activities.Here is some of things that other people of great knowledge and with nice degrees under the belt say could, might or even is true about the moon.1. We have no evidence that the moon was always there, only what we have in record throughout history.Some claim the moon would be an artificially created structure.Indications of techonlogically highly advanced civilisations before us are there.And mining out a tiny planet and placing it in earths orbit is not far fetched if you consider higher technology levels than what we currently (officially) have.2. The satellite claim.Like the Death Star our moon could be an artifical satellite placed there for a purpose.What speaks for that theory is the impact craters on the moon.If it was never spinning or better rotating around all axis then a lot them would have been impossible.A crater always shows to some extend the direction of the impact.And on the moon they all apear to be direct and straight hits only.And even at some proper angle that against physics did not create a corresponding crater: Our plant would have been in the way.Officially it is claimed though that there would not be much of a directional crater because of the missing atmosphere and all debris settling evenly.Debris however does not explain the deformation from an impact at an angle.The satellite claim would also explain the missing depth in the craters.By the size of the bigger ones the crater should be much deeper and as said show some direction.If however the rocky surface landed there over time or is just the remaining natural hull then the craters could no go deeper.No advanced civilisation would design a stationary satellite that get a hole as soon as some big space rock hits it...3. Undocumented missions.If claims are true then we have been up there a lot more times than what our history lessons tell us.Tiny probes to analyse things, send data and so on are a thing not the the USA did.If you explain the reason for collecting seismic data by wanting to document an impact of an astroid then it is a joke.Sure it would be possible but what could we learn from the data?Nothing unless you consider that in some unoffial missions drilling was attempted on the moon.Sample collection to evaluate what is in the ground of use for future missions.Some documents now claim that all these attempts ended prematurely.Drills failed or broke, drill heads failed to go deeper and upon inspection were totally worn out.And all seemed to have happend at around the same depth.Although there is no atmosphere on the moon - if you stand on it you would be able to feel vibrations of the surface.Something astronauts would have felt during the drilling.And you can feel the difference between a vibration ending by stoping the drill and one that keeps going for a long time after...The dark side is visible in quite a few school books.Looks like the front with the brightness corrected just with different craters.Ever bothered to scan these pictures in and use some software to find matches to craters on the front of the moon ? ;)Anyways, those images show us the moon as near perfect sphere.What they don't show is how the images were actually made.They certainly did not use massive search lights from orbit to provide light for cameras.Means other sources were used, like IR, Radar, Microwaves and so on.Like we found the ruins of old civilisations by using satellites that can "see" through the forest and soil.And with that it would certainly be impossible to create such a nice and detailed image like we get from the front side.If some is edited, then why not all of it...And if all those missions we don't really know about also landed on the dark side it would explain a lot of things.All sightings seem to have disappeared to the dark side.And all leaked informations about previous missions before our first landing idicate the interest in the dark side was actually huge.They all ended though with one mission report claiming to have spotted lights on the dark side.Moving and stationary and when trying to get a better look by adjusting the orbit for the next round those lights were all gone.But audio recording indicate that from that moment on the astronauts were no longer alone and followed until turning back to earth.Several attempts seem to have been made to land near sightings on the dark side.Those where the astronauts returned home the never were the same again.Documents claim long treatment in mental facilites or suicide.The official missions appearntly started with the backstory of exploring.Some now claim it was attempt for a peaceful presence that still was not tolerated.4. Stories from involved companies.Even if NASA builds a craft themself they still need the corresponding supplies.And for a lot of things they are made outside by independent companies and contractors.Trying to track down early space mission again seems to confirm all claims about previous missions.The amount of materials provided would otherwise mean NASA actually crashed the majority of things right after take off without anyone noticing.5. Launches...So far all claims about previous moon missions or just secret ones were denied.I call this "plausible deniability".In all statements it is refered to the official launch sites.Things like being in public view and so on.What is not that commonly known is that there were a lot of capable launch sites available.After all big rockets have been tested in secrecy since we had the first.The claimed landing of the chinese started a big conundrum.At first the US claimed it never happened because there was no rocket that went up.Images prived by the chinese however clearly indicated the opposite.Not much later it was noticed that a few launches might have been misinterpreted as missle tests....What does that really mean?Quite simple: The surveillance is not perfect if the other side insists that it happened.The plausible deniablity is gone.If the US was "forced" to confrim they actually noticed the launches then it also means the chinese claims about the US doing the same could be true as well.And wasn't it a very important thing during the cold war to know when, where and why the other side launched anything?The silent agreement not to go up there again was broken many times...And although most if not all of these mission ended in orbit only it makes you wonder.What would be big deal even if all claims and conspiracies would be true?A hollow moon would defy what we know about how the universe works.With that it would also contradict some of solid laws of physics.So we need(ed) proof.Assuming we had that for a long time already then it leaves the big question of why it is hollow.Natural or artificial.Nothing natural would make sense so we investigate further.And if people still claim that they can use their little equippment to every now and then hear transmissions from the moon...Sure some things up there transmit data all the time but they do so on common frequencies and not in a range that is and never was used for long distance communications.The interest in the mon came back with our modern technology.We have watches with more computer power than what was used for the old moon missions.Materials and manufacturing methods that provide much safe crafts and space suits with a fraction of the weight of old designs.And we have new means of taking more or less limited energy up with us...We are prepared so to say.No matter what really is up there, no matter if it natural or artificial, just the fact that the moon is hollow changes our views on a lot of things....What do you think would be the best explanation for the data showing the moon rings like a bell?

Topic by Downunder35m    |  last reply


Can you run a 50CC dirtbike motor with the clutch bell open??? Answered

I am trying to fix a dirt bike motor but don't know much about them I want to know if you can run the motor just to test it without putting the springs back on the arms of the clutch bell and without the cover and gearing installed. 

Question by camping crazy    |  last reply


wireless switch for CFSound III

HelloI would like to use the CFSound III http://is.gd/2IDt (so can record own sound) but activated by a wireless switch on a door for when it opens. They don't make one.We be grateful for either online store for purchase or instructions for making/hackingbestm

Topic by greenface2222  


How to make bells light-chime for Cathedral art exhibition?

Hello, My girlfreind is making some bell shaped sculptures out of string (seven in total) that are to be hung in the local cathedral, and she would like to make them 'Chime' by lighting up. I say she would like to make them do this, but as I'm slightly more practical (though not a great deal) I've been charged with the job. I've done some reaserch into variouse methods but these either seem unapropriate or are too technically demanding. I've looked at DMX style theater light controllers- too expensive and bulky, and using a programable circuit board controller- over my head. Ideally, she would like a bell to light up for a second or so before dimming, and then have a different bell do likewise and so on. The pattern can be comlpetely random and does not need to represent a piece of music. I thought I may be able to do this with pendant lights and timer plugs, but the timer fragments on these represent fifteen minutes- too long for the lights to be on to read as being struck and chiming. Is there anyway to shorten these time fragments? Would consider using lower voltage lights a transformer and some clever electronics, as I can solder. I just need some idiot-proof advice. I can PAT test it too before using so dont worry, I promise not to sue if I blow myself up. Help! Best wishes, Chris

Question by Chriscarter    |  last reply


Need Science Help. Is this safe?

On my ongoing quest to find a science fair, I stumbled upon this : it's basicalle a high voltage motor that acts like a bell, with a clapper that bangs from one can (or bell) to the other and back again.The thing is, it get's it energy by putting an aluminum foil over a TV screen, which has a lot of static electricity.I was wondering, is this safe?

Topic by Keith-Kid    |  last reply



(HELP) Linking Wireless Pir Sensor To Wireless Chime

Hi, trying to get a wireless PIR sensor to activate a wireless door chime... Given up trying to get the PIR to transmit the same frequency as the chime so now trying to get the PIR to switch on the wireless doorbell chime.  So in theory, motion activates sensor, signal from sensor goes to door bell button, signal from door bell button goes to chime. I've attached wires to the bell switch, but don't know where to attach them onto the PIR:   experiments so far have activated the chime but it stays on so I think I'm just shorting something out. Also, should both power sources (for PIR and doorbell ringer) remain as PIR is 9v and bell ringer 12v? Hi res pics below, thanks to anyone for their help and advice! Greg PIR transmitter Front http://i.imgur.com/77xcEcx.jpg Back http://i.imgur.com/8PqwSBl.jpg Doorbell Button/transmitter (wires tied on switch contacts) Front http://i.imgur.com/VW5OAGz.jpg Back: http://i.imgur.com/SLOchYn.jpg

Topic by gregoire500    |  last reply


Simon Field's Science Toys

On my visit to Simon Field's farm, Simon showed my friends and me a great many awesome tricks and toys.  Of course, Simon does run Scitoys.com so this isn't surprising!  First we saw his workshop where he spends his time doing research, inventing things and writing books about them. He showed us a trick of floating aluminum pans off of a Tesla coil which I sadly did not get any pictures of. Next he got out a small vaccuum chamber and set some marshmallows in it. Yes they expand awesomely as the pressure declines, but what happens after that surprised me. Take a look: He also had a board which he had painted with homemade phosphorescent paint, made from ground-up strontium aluminate (I believe it was).  You could "draw" on it with a laser pointer: Here is an example of Franklin's bells, an electrical demonstration made famous by Benjamin Franklin.  A small metal clapper is suspended between two metal bells, each of which is hooked up to one end of an electrical circuit.  If sufficient voltage is passed through the circuit, the clapper is attracted to one bell, touches it, releases (or obtains) electrons to become similarly charged, whereupon it is repulsed.  It is then charged oppositely to the other bell and is attracted to it, until it touches that bell and swaps charges.  The cycle repeats as long as the circuit is maintained. The last thing we did was to eat whipped cream... that had been frozen in liquid nitrogen!  This turned Quinn into a dragon.

Topic by rachel  


Can I detatch the cylinder from a typewriter so that the bell and sliding mechanism still properly function?

I have an idea for modding a nerf gun involving attatching a typewriter cylinder to it so that either firing or cocking the gun causes the cylinder to "Ding".  Is it possible to safely detatch the cylinder of an old typewriter so that the sliding mechanism and bell still function correctly?  Also, could someone please provide me with a chart of the individual mechanisms within an antique typewriter? Thank you Instructables.

Question by Spiderdog3000  



Trip USB Missle Launcher

Hello everyone this is an idea i had and i am going to try and do. The idea is to take one of the Wireless USB Missile launchers(seen here: http://www.newegg.com/Product/Product.aspx?Item=N82E16800997039) and connected it in some way to one of the trip bells(often seen at stores). Instead of setting the bell/alarm off i want it to send the singal to the USB Launcher and have it shoot at a set location.If anyone can help direct me as to what i need to buy and do to make this work all help would be appreciated.

Topic by Jreed129  


How do old-fashioned hand-crank telephones work? Answered

I was wondering how old fashioned hand crank phones work, in particular: Does the cranking provide power to the phone, or does it just ring the bell on the other end? I always thought that the cranking rang the bell on the other end of the line, and that the phone itself used a transformer to amplify the input from the microphone, without using power? Also, how do duplex coils keep the user from hearing their own voice through the speaker? Thanks!

Question by mad magoo    |  last reply


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Topic by thenear1send    |  last reply


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Topic by Tool Using Animal    |  last reply