Bluetooth repeater

This is actually a question, for a group who appear to be the real hackers of science. OK, so much for the butter.. here's my question: I've seen an add for a Bluetooth device which will connect up to five headsets, forum style. But at 400 plus shipping, U.S., I was wondering if there might be another... more techie... cheaper way to do it. I only need to couple two headsets, but I understand that headsets don't have the smarts to be able to pair with each other. Any takers? Anyone do this before? Thanks, Stan

Topic by stancomm 


Repeated Instructables?

Would Instructables benefit from another Instructable similar to some that quite a few people have already created? Or would it just be a nuisance?

Question by .Unknown.   |  last reply


Repeating Shotpistol

So it's been forever since I've posted anything. Here's something I was working on. At first I was just trying to remake my DERP pistol into something actually post-worthy, but the magazines were being finicky without a decent mag lock. I figure I like my Oodassault 3 better, I'll probably remake the 9 and make that post-worthy instead (getting people interested in K'nex guns elsewhere, but I don't have decent instructions for the 3.7 or 3.8). However, I really liked the base of the gun with the body and trigger so I decided to give this concept I had going for a while on compacting my shotgun a go. I'm sure people have had a similar idea, but I haven't seen one posted yet, so here's mine. So the idea is that I have a part similar to the pin on my last shotgun, except I've shortened it an turned it into an energy transfer for a normal firing pin. That way you can still disperse the energy across three separate bullets but now the design can be much stronger in a smaller package. Other than that, the only real features are the sliding trigger adapted for this body and a pin lock that's incredibly simple again for this body. I liked those two things, so I'll probably try to find a use for them elsewhere as it allows for a compact weapon. The only problem with this gun is that, well first the internal barrel is kinda crude because I changed only the front but couldn't be bothered to fix the middle after. Then I couldn't be bothered to make a good front magazine wall, so it's too low and the ammo shoots at a downward angle. So, if someone wants to take the concept and improve it, go for it. Else, just let it be known that I'm still alive.

Topic by TheDunkis   |  last reply


Repeat Thread about Repeat Instructables

First point - I am not against different versions of the same item. There are often several equally-good answers to the same question.However...I just looked at the "recent" explore option, and about half the instructables on the first page were repeats of past Instructables. Two almost-adjacent posts were for the same thing.Now, remember, I'm not against different versions of the same thing, but these were very similar to the past versions. Not copied, but re-inventing the wheel, if you will.This has been a bug-bear in the past, with some members getting quite heated about it.I would like, therefore, to propose a set of possible solutions, using the Instructable on writing Instructables:> This could be linked by a permanent, prominent button from everybody's "home" page.> It could be automatically sent to new members as part of the registration process.> It could be highlighted as part of the Contribution process.Alternatively, when one clicks on the "new instructable" link, it could direct the user first to a page with instructions on searching the existing archive for any previous versions of the project before getting as far as writing "step one".I commend the motion to the house.

Topic by Kiteman   |  last reply


how to make repeaters.?

I hav an rc car which has very little range. Since i hav found that there is no effective way to increase its range i am struck with an idea of making some repeaters for it is that possible......??

Question by kocchumon 


WiFi Repeater with Arduino? Answered

Would it be possible to make a WiFi repeater with the equipment on this Instructable: https://www.instructables.com/id/LINUX-LEECH/ withe the addition of Arduino and a small LCD? It would be really awesome and may even lead onto cheap mesh networking! :D  Thanks for any help! :)

Question by Sev the Sniper   |  last reply


wifi receiver/repeater??

Hi everyone, i looked at the instructable of the wokfi antenna and the site of where it all started on that topic ( http://www.usbwifi.orcon.net.nz/ ).i found a free wifi access in my area, i got 1 pc (ethernet card+ usb wifi dongle), one laptop (wifi), a nintendo wii (wifi) and an old pc (233mhz, ethernet card) also a spare ethernet pci card and a pcmcia wifi not in the laptop, laying around .here's what i would like to do to have internet for free:- get the signal from the free wifi access point to the 233 mhz pc- use that pc as a firewall- then send the signal thru the ethernet cable and with another wifi (the pcmcia in the pc with a pcmcia to pci adapter or another usb wifi dongle, witch ever is cheaper) because my laptop can't reach the free wifi access point, it's to far..i'm looking for help on this please, i'll do an instructable with it because i think it could also be usefull to other. that whole idea of free wifi to anyone could be used here. because, let's say in a block, dorm, appartment a far away wifi connection could be shared localy. i've been digging for an intense 2 days now but my knowledge about networks and english (my first language is french) aren't that good so if anybody got an idea where to start looking it would be very appreciated.

Topic by novielo   |  last reply


Cell phone repeater for my home.

I'm looking into getting a cell repeater for my home. I live in a rural area with not a lot of service inside my house, but four bars outside. The repeater I'm looking at uses an omni directional antenna that draws in signal from multiple towers for multiple carriers. My question is, since this system uses an omni antenna, wouldn't any antenna do? Such as a CB antenna? The way I look at it the antenna draws in all types of signal but its left up to the inside receiver what type of signal to use? Am I wrong on this?

Topic by cladner74 


Any body ever tried building a cell phone network repeater?

Hey has anyone ever tried building a cell phone network booster/repeater? A wireless one. I tried looking around online but just been getting Marketing stuff nothing which you could actually sit and construct yourself. May be using an old access point or something! I am not that too good with Radio circuits so looking for help to be able to try and make something really cool in my spare time. :)

Topic by metallica1025   |  last reply


HAM radio repeater controller arduino

Is there anyone who can help me with a repeater controller, i need a little program which will switch according to input + 3 sec (or something like that) also i want to decode 4 bit paralel data (binary output from a DTMF decoder) and switch outputs accordingly (if correct code is pressed) (thins like identifier, time&date;, last transmitted message) thees functions i will make on separate boards, i just have to trigger them last transmission board needs an input from the arduino when to start, the playback will be done with one of the DTMF-code outputs any advise / code is wildly appreciated :) ps, im very new to arduino and have plenty to learn  kind regards, milan 

Topic by milanhofman   |  last reply


Belkin N750 DB into repeater?

I have a Belkin N750DB dual band router and i need to turn it into a wifi range extender/repeater. DD-WRT is not available yet for this model so i was wondering if there was any other way. 

Question by Kirschbj   |  last reply


My Feed Repeated Posts

When looking at my "Feed" on instructables.com some of the posts repeat themselves. I've atached an image which is zoomed out really far to fit the repeated posts in the same window. This of course makes it difficult for me to discover new instructables.  Info:  Browser: Chrome, version: 47.0.2526.106 m Operating system: Windows 7 Professional 64 bit Steps to reproduce: 1. Signing into my account 2. Clicking "You" in top right corner 3. Clicking "Feed"  4. scrolling down until one has a puzzling feeling of deja vu

Topic by BrendanC3   |  last reply


Rbg Alpha Repeater (NEW)!!!!!!!!!!!!!!!!!!!!!!

I made this new rubber band gun it rocks so much heres a couple of pictures of it

Topic by Erikthegreen   |  last reply


Repeating Musical Greeting Card?

Hello all,  I have purchased an inexpensive musical greeting card that plays a song for 20 seconds and then stops. What I am trying to figure out is if there is a way to put a 555 timer on this thing that will send a pulse to repeat the song at 15 seconds. Basically, make it so that the card will repeat the song forever at 15 seconds so that you don't hear the fade out of the song for the last 5 seconds.  Can this be done and if so how? Many thanks!!! Wes

Question by wfunderberg   |  last reply


Dir-300 as Wifi repeater

Hello, I have an AP in my house which broadcasts our wireless Internet signal throughout our house. Unfortunately there is a spot in my house where the signal is not received. I have a spare dlink dir-300 router which I installed custom firmware on (dd wrt). Can someone please help me use it as a wireless repeater. I want it to boost the signal of my other router. Dd wrt has a repeater function, but my router is an atheros chipset so it is not native on my device. P.s: I don't really want some cheap wifi booster made of tinfoil :p . Thanks in advance, Sam

Topic by Bituser   |  last reply


Repeating RSS Feed Topics

I'm subscribed to the RSS feeds for Instructables, News, Forum Topics, Comments (to me), and my Personal Messages Inbox. And they all repeatedly send me the forum topics. Most of the "new" items I get in all of my Instructables RSS feeds have already been sent to me before. It's incredibly annoying.

Topic by Aeshir   |  last reply


.9 Repeating Equals 1?

HI! I am wondering if .999...=1? I mean if 1/3=.333 and 1/3+1/3+1/3=3/3 and 3/3=1. So wouldn't .333...+.333...+.333...=1? But it actually equals .999... not 1. I googled this question and I got many different answers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For example...(someone wrote): I'm not really into math, but a friend brought something up to me today that really seemed very strange. (For the duration of this post, .999 will mean .9 repeating unless otherwise specified- just for the sake of ease) .999=x 10x=9.999 10x - x = 9x 9x=9 1x=1. .999 = 1. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Someone else wrote: Numbers are fake. They are a manifestation of our minds to describe something, similar to words. Just because we say "red" doesn't mean something is red. what is red? Languages and math are very similar. Math is universal...at least for our planet though. .999~ does not = 1. But what .999~ repeating represents, does in fact equal what 1 represents. No-one will ever be able to comprehend infinity, os its time to stop trying. Think of space and the universe. IT IS GROWING. how can it continue to grow with no stop? what is there to contain it? WE need something to contain it in order for us to understand it. We need a stopping point, but there is none. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ So who is correct? Do you agree that .999...=1? Or .999... does not equal 1?

Question by Pizzapie500   |  last reply


Slimmest Repeating Folding Gun

Alright I've always wanted to make a folding gun that worked and looked decently. However, it would probably have been ignored if it didn't bring anything new to the table. I wanted to give this one a horizontal magazine but then there wouldn't have been enough room for other stuff like the handle. I said screw that and just went with a normal magazine. So far this is the slimmest design for a folding gun that repeats. A smaller one could be made but I'm starting off simple before playing the nanogun game. A nice bonus is that it doesn't have any blue rods sticking out so it is actually possible to fit it in your pocket if you're wearing big enough pants. It fires. Decently depending. Has a 4 round oodammo magazine. I don't really care for the handle but it works. The way the bands are set up, it doesn't require a lock though it doesn't automatically unfold either. Just flip out the stock and it'll stay out then you pull down the handle. Edit: Alright video up. This version fires oodammo.

Topic by TheDunkis   |  last reply


blank view and repeat login

Everytime I log in and than view any item and want to download a PDF I am sent back to the login  I re login and again same procedure over and over.  I paid to become a member and so far I have yet to be able to use the site and am beginning to get upset. Not only does this happen nonstop but when I try to use the search it begins to search and than the screen goes blank with nothing left but my browser header, Why does this happen? I did not have any of these problems until I paid for a membership and now I can no longer use the site. I feel as tho I need to request a refund and forget about the site. Can someone tell me why this happens? I have XP Pro & normally use IE8 but have also downloaded and tried using mozilla and I get the same results constantly being told to login and a blank white page when I try to do a search...UGH Thanks for any help on this matter,, and hope I placed it in the right help section. Terri

Topic by ladysav   |  last reply


Auto-chambering Repeater Concept

I just got this idea a couple days ago talking to Jammy. Here's a crash course physics lesson: When a larger object (a pin in this case) hits a smaller object (ammo in this case), only enough energy to make the ammo fly faster is transferred. This is because it takes less energy to make something of less mass move at the same speed as something with more mass. So as soon as enough energy is lost in the pin and gained in the ammo, they fall out of contact and the rest of the energy in the pin is wasted. You can't really make pins any more efficient than they already are, so I figured I'd try utilizing the otherwise wasted energy. I figured one of the ways you could do this is by making a gun that automatically chambers a round after being fired. It'd be like a bolt action weapon except instead of manually operating a bolt handle, the extra energy would load the the round for you. The result is less effort and more efficient pin use. People may think this is less reliable than manually operating the bolt bin, but I beg to differ. This, in theory, would provide a more consistent chambering action. As long as it's fine tuned, the rounds should load exactly the same each shot. Also, you wouldn't be able to screw up chambering an extra round. You can pull the bolt handle back on a cocked bolt action weapon and easily jam the mechanism. With my concept, you can only chamber a round after the currently chambered one is fired (unless you purposely fiddle with the back of the gun) because the bolt pin relies on the firing pin to operate. I have the front of this gun finished, but I still need to design the bolt pin assembly and the back of the gun to hold it so that I can actually fire this thing, but I'm confident it'll work out very well once I do. Here's a video to demonstrate the concept. I'm hoping that once this gun is finished, it'll be a viable war weapon, seeing how I don't have anything better than my Oodassault at the moment. Or at least if I can't finish mine, someone else can use the concept.

Topic by TheDunkis   |  last reply


Anyone know how to build a Cell Phone Repeater or Booster for a tower?

I'd like an economical way (if that's possible) to build a cell phone repeater or booster that can work for multiple cell phones, and be mounted on top of a tree or some other tower or pole. (Boosting signals here is legal). The reason I'd like to do this is because we use a cabin that's located deep in the forest and currently cell phone signals are spotty. (Move down the road 100 feet or stand on a stump and it works, but not where you really need it to). My concern is for safety as many of my family members use this area, and if there were ever a problem, I'd like to know that we could get a call out for help. I've done quite a bit of searching on this already, and have found several methods to improve the cell phone antenna, or the coffee can method, but what I'd really like is something that can work for ALL of our cell phones (that are with different cell carriers), and therefore (as I understand it), can be on different frequencies. The only thing I could find were devices that were out of the box ready and at a hefty price. Does anyone have any advice? or can point me in the right direction in order to build something like this that will work? Thanks, canucksgirl Edit: Let me clarify that the intended purpose isn't to be able to contact 'emergency services' from camp. We're a few hours from the nearest town and it isn't conducive to 'sit and wait' for help to arrive. Our group has been extremely safe, competent and self sufficient in that area for more than 30 years. Without getting too personal, we have an "in town" family member with a serious illness. If there were ever a reason, we'd like to be able to reach family at the camp to let them know that they needed to return home.

Question by canucksgirl   |  last reply


What is the best handle fed K'nex repeater? Answered

Does anyone know of a good handle fed repeater. BTW ideal range aroynd 30 feet, and it needs to be small. Thanks...

Question by webby427   |  last reply


I need to repeat radio frequency in the 402MHz range.

I need to repeat radio frequency in the 402MHz range.  How do you build a RF repeater? I need to extend the range of a CGM (Continuous Glucose Monitor). It uses the MICS protocol.  Can you adapt an existing device?

Topic by arourke1   |  last reply


Long Range Off the Grid WiFi Repeater

Hello Everyone,  I've got quite the project that I am undertaking and I am looking for a bit of advice. This will be my very 1st forray into long-distance wifi, as well as off-grid power resources, so Im biting off quite a bit at once! I have a friend who has been helping me with the research who has a much firmer understanding of both electricity and hardware, but he will be out of town for the next week and I would like to get a bit of progress on this while he is gone. SO, I shall consult the hive mind known as the internet. Alright, this project consists of creating an uplink between a remote shed, and a home in a nearby city, with a broadband connection. The rub, there is 10,000 ft mountain range in between the two. We have a site were we can put a repeater node at approx. 10,000 ft elevation, that has wonderful line-of-sight to both locations. However, this site is very remote, and will have to run off the grid obviously. The distances are as follows: Home to repeater: 3.96 miles (thats with Google Earth following the contours of the          mountain/valley, not sure how to make it just do a straight angled shot, so thats a rough estimate) Repeater to Remote shed: 2.68 miles (same issue) Background environment info: shed has generator + 60w solar array with 3-4 deep discharge lead RV batteries at 7400 feet. Has spring fed running water, which could be utilized for power as well, as obviously its always running. Repeater location is at 10k, as stated. Moderate to high winds very likely (data from peaks of similar altitude in the general area show gusts ranging from 40-60 mp/h, temperature ranges of  averaging 7 to 90+ for a the later part of July and August (F). Obviously, its very possible to get soemething below this, though the lowest Ive ever seen at the shed has been -15 (f), I would say most winters we could get a few nights that see temps below 0, but not often. Equipment Ideas: So to pull this off, we have come up with two ideas for the network equipment, which I shall discuss 1st, then I will show you what we have come up with for power.  - Network    - Repeater Node: rb433 wireless access point ($99.00) http://www.routerboard.com/pricelist.php?showProduct=43         with 2 r52h mini PCI wifi chips ($59.00 x2) http://www.routerboard.com/pricelist.php?showProduct=69         2 8-18 inch satelite dishs converted for long-range WIFI use (20.00 x2) http://www.engadget.com/2005/11/15/how-to-build-a-wifi-biquad-dish-antenna/ OR instead of a rb433, we could use 2 WRT54G Linksys routers like this. (I also have 2 BEF 801.11b routers that are legacy to the WRT54G. I would like to use this if possible! http://hackaday.com/2005/08/23/how-to-greyhat-wifi-repeater/ Now, I know that this later choice would increase power use by about double. From what I have been able to find, the WRT's would at anywhere from 4.2w to 8w of power. Anyways, I like this later choice because it would be significantly cheaper for the equipment, but do you have any other ideas? I know that the RB433 would work great, but its rather expensive all said and done after I throw up the power as well. Plus, if it takes a lighting strike, its out of commission, and 2 cheap linksys routers are much cheaper to replace! Anyways any input here would be great! - Power  so power to the repeater node is the real challenge. We crunched the numbers and came up with something almost exactly the same as below: From the datasheets, a routerboard will draw between 6-10W. So design for 10W. Over 24 hours you will need 10Wx24h = 240 Watt.Hours of power. For 7 days, you need 7x240Wh = 1680 Watt.Hours. A single, large deep cycle 110Ah 12V battery gives you about 1320 Watt.Hours of power, almost meeting the requirement. Now, to look at the solar panels: A good rule of thumb is to install 6 times the wattage that is drawn by the device. This is because only about 8 hours a day in sunny weather gives you maximum power output from a solar panel. So the other 16 hours you need to draw from the battery. (So already you need 3 times the wattage drawn by the device to break even each day) To generate 1 full day of extra battery power per sunny day, you need another 3 times the wattage. This is how we arrive at 6 times. 6 x 10W = 60W. So at a minimum I would recommend 60W of solar panels. That qoute comes from http://diywifilink.wordpress.com/ and http://mybroadband.co.za/vb/showthread.php?179547-Advice-needed-Setting-up-wifi-repeater-11km which is a project from a guy in South Africa almost exactly the same as the one that we are working on. The numbers came out to be about the same (Though they were a bit different when we calculated for the WRT54G option.) so, 60w of power generation to keep a decent charge on a battery. Now, we have a 60w panel at the shed, which is rather large to take up to 10,000 ft and place on the side of a mountain, and given the consistent wind element up there, we are hoping to do a hybrid system of both solar and wind. This is where things get tricky. A perfect balance, or even a more wind heavy balance would be great, such as 30-40w wind 20-30w solar. That keeps the panel size down, and uses a power source that runs 24/7. A Faroun Savonius wind turbine seems like the best system, but the controller to prevent overcharging etc is where I get nice and lost, having breached into very unknown territory. https://www.instructables.com/id/Faroun-Savonius-Wind-Turbine/ http://www.fieldlines.com/board/index.php/topic,129060.html This looked at 1st like a good, cheap system to use a controller board for the wind, but my question is would the controller board that comes with these solar panels (see below) work for both. That below is the setup that we use more or less at the shed, with some mods, such as a better alternator. http://www.costco.com/Browse/Product.aspx?Prodid=11298029&search;=solar&Mo;=5&cm;_re=1_en-_-Top_Left_Nav-_-Top_search⟨=en-US&Nr;=P_CatalogName:BC&Sp;=S&N;=4001192&whse;=BC&Dx;=mode+matchallpartial&Ntk;=Text_Search&Dr;=P_CatalogName:BC&Ne;=4000000&D;=solar&Ntt;=solar&No;=3&Ntx;=mode+matchallpartial&s;=1&topnav;=&Nty;=1&s;=1 So, can a small, 30-50w wind turbine and generator be built, with a small solar array to power this thing? I dont care if we have some down time, this is primarily going to be used as a system to get a weather station with web cam to send in hourly photos during the peak hours. I can have the system at the shed shutdown automatically  using some cron jobs in linux during the evening to conserve power. When there are people at the shed, we would like to be able to get a good enough wifi connection to use a wifi device (such as an android phone or ipod) to use as a voip phone in essential communication. The teenagers aren't going to be chatting with their friends for hours, but we would like to be able to put a short call through in case something goes wrong, or we just need to get ahold of someone at the shed or in the city. Next the equipment at the shed should be comparable to the repeater node,  sans 1 antenna and just some low power embedded system. We would like to get a webcam and weather station hooked up on this end, but that can wait for upgrades later if needed, if power doesnt allow it. like I said, a simple water turbine could be used (something similar to the wind turbine perhaps?) and even another wind turbine could be built to add extra power dedicated to running any system at the shed, though I dont think the wind is quite regular enough to be viable here, but if its cheap, we could throw it on anyways. equipment at the home in the city is simple, just use an extra laptop or desktop we have laying around to be server/router, hook up antenna to this, broadcast connection, run the weatherstation/webcam web server off of this. So, thats the plan, but load of input is needed to try to come up with this. We hope to try to keep this sub $1000.00, but the budget could go higher. This is DIY at its finest! Thanks in advance for you help!

Topic by kydan   |  last reply


My T.N.K.I.T Entry

Here is my entry for the T.N.K.I.T. Its a Full auto/ Repeater Duo. What i basicly mean is that its a 2 in 1 gun. I am using 64#'s on the gun so i only shot 4. Here is a video: It doesn't normally jam, but a piece had fallen out of the mag.

Topic by Millawi Legend   |  last reply


Repeating the same instructable on the same page

Why does instructables repeat the same instructable over and over. I can understand recycling it one a week or month, but on the same page...too much.

Topic by wwlaveck   |  last reply


CD-Rom drive repeat song? Answered

Can I make a CD-ROM drive repeat a cd over and over again? This is using https://www.instructables.com/id/CD-Player-from-a-Dead-Computer/?

Question by ebodenberg   |  last reply


Arduino pattern repeating LED help?

Hi, Thanks for reading my question. I've been looking for a simple arduino code that repeats a couple of button presses. In my search I came across http://nakubu.com/post/25 this code repeats the button presses. But the thing is it only repeats when the button is pressed and the time in-between the presses. The program doesn't record the time the button was pressed. Can anyone help change the code so it records a complete pattern? TheExternalDisk

Question by theexternaldisk   |  last reply


4G (LTE) Home Repeater With LimeSDR

I am making a "4G (LTE) Home Repeater With LimeSDR " product . i read it at : https://www.instructables.com/id/4G-LTE-Home-Repe...but i don't find file repeater.ini or 4G_Vpeater.ini . . Can you help me ?

Question by HUYL31 


Knex Alpha sniper repeater AMAZING!!!!!!!!!!!!!!!!!

I created this new gun that is longer more acurate better equiped and hurts alot

Topic by Erikthegreen   |  last reply


Garage door sensor repeater light.?

I use the flashing / steady sensor light to guide me when I am in the correct parked position to avoid hitting the front wall. But I have to strain to see the light in my passenger side mirror. I want to install a small LED light on the front wall to repeat with the sensor light to make it easier to park. Any ideas folks?

Question by mariner338   |  last reply


Feature Request: Repeat Ible Alert

Sometimes I see a new Instructable (usually by a first-time poster) that is very nearly a repeat of an existing Instructable. I think that if people knew that their idea had already been I'bled before they published it, many of them would stop at that point (which would be unfortunate) but SOME of them would make the extra effort to differentiate their work with some new or novel approach, or better directions/photos/results, etc. If you do a "view Instructable>>" while you're building one, the "Related" sidebar of similar Ibles shows up, but it doesn't appear to be intelligent at that point. That might be a simple fix. Or maybe as soon as you fill in the "Name This Instructable" box, the "Related" sidebar would appear. Just a thought. James

Topic by Scubabubba   |  last reply


"Repeating Image" comments bug and a workaround

Several regular users, including myself, have noticed an annoying bug in replying to comments. The two comments before were copied from the same Forum topic, and were made about 1 minute apart. As you see, the second comment has the same image attached as the first, even though gmjhowe did not select add image the second time.This bug is easily reproducible. Reply to a comment in either a forum topic or an I'ble, and attach an image. Now scroll around and reply to a different comment on the same page. You'll see your image appear when you post the second reply. The error, I believe, is that the cookie(s) created by I'bles to save the sate of the first reply is not completely erased when the user completes the posting. The information about attached images is preserved, and leaks through to a second comment on the same page.The workaround I have found turns out to be really simple. Leave the page (for example, by using the Back feature of your browser), and return to the same page by following a hyperlink. Don't just use the browser's Forward feature; that will preserve state and the bug will occur. By following the link to the page "fresh," I'bles will erase the previous cookie completely, and create a new one in anticipation of what you might do on the "new" page.It would be good if Rachel or somebody could fix the cookie-handling bug so this doesn't continue to happen. It's a real pain if you've just written a long second comment, possible with formatting, and then find unexpected images attached to it.

Topic by kelseymh   |  last reply


battery powered outdoor router?

I am wondering is there an instructable that shows how to build a battery powered outdoor router? I would like to extend the range of my wifi by using an old router as a repeater but don't want to have to string a extension power cord out to it in order to power it. I know routers don't take that much power to run so i would think someone thought of this already somewhere..... I have searched on instructables but haven't seen anything. thanks

Topic by jerty30   |  last reply


HELP! With Arduino coding.

Im working on a project to link 2 radios to make an em-comm repeater. I need the Arduino to preform the duty of the controller, and turn the transmitter on when a signal is received. I have all the sensors figured out, i just need help on the code, which il include at the end. if anyone can help, your name will be given kudos in the instructable, and will have my eternal gratitude! The entire project only takes up 4 digital pins, which are the receiver senseor(sensePin), the transmiter key(trigPin), the busy led(busyPin) and the ready led(readyPin). The idea is that when sensePin reads a HIGH state when a signal is received, it will set trigPin to HIGH, keying the transmitter, and set busyPin to HIGH, activating the BUSY indicator.At the end of this proccess, i would need a 3-5 second delay before the standby/ready sequence. When sensePin is read as LOW, trigPin & busyPin would be set LOW and readyPin would be set HIGH, activating the READY indicator. #define sensePin 13 #define trigPin 12 #define busyPin 11 #define readyPin 10 void setup() { pinMode(trigPin, OUTPUT); pinMode(busyPin, OUTPUT); pinMode(readyPin, OUTPUT); pinMode(sensePin, INPUT); } void loop() { if(sensePin, HIGH){digitalWrite(trigPin, HIGH); digitalWrite(busyPin, HIGH); digitalWrite(readyPin, LOW); delay(5000);} else {digitalWrite(trigPin, LOW); digitalWrite(busyPin, LOW); digitalWrite(readyPin, HIGH);} if(sensePin,LOW){digitalWrite(trigPin, LOW); digitalWrite(busyPin, LOW); digitalWrite(readyPin, HIGH);} else {digitalWrite(trigPin, HIGH); digitalWrite(busyPin, HIGH); digitalWrite(readyPin, LOW);}} If anyone can figure this out, like i said,i would be eternally greatful!

Topic by KJ4ZVQ   |  last reply


What wifi antennas would work as repeaters? Answered

Something that was used in this article:http://www.pbs.org/cringely/pulpit/2002/pulpit_20020207_000721.html (like the 2 yagis he mentioned he mounted on the trees)? So basically an antenna, or maybe a pair, mounted between two points to get the signal around a patch of trees/buildings. Thanks.

Question by cyprusrom   |  last reply


GPS Repeater from a Hacked Wirelss Router?

Hi all. I'm building a GPS Repeater. I'm wondering if any one has ever tried to use the LNA on the Xmit side of a wireless router to amplify and re-radiate a GPS signal? I'm still in the research stage, but I'm thinking I can take the signal from a active GPS USB patch antenna, tie it into the LNA input on the RX side of a wireless router (hack all signals in the router- we are just interested in the power and signal input). Schematics to a router would be great. I have 10+ years in RF, so I know that the Xmit on a router is so not 1.5GHZ range like GPS. A few mods to some componets can ceratinly help turn the center freq of the Xmit. on the router.   What are your thoughts?

Topic by chris23892   |  last reply


Knex Semi Auto

When you think about it, there is no possible way to make a good, strong and cool lookinig semi auto. Unless it has multiple lbarrels, then it Is impossible. Why Try then?

Topic by Bartboy   |  last reply


homemade signal booster? Answered

I was trying to figure out how to boast my signal coverage in my area, and a got an idea: to use a UHF amplifier, to pick up the towers signal and rebroadcast it. of coarse since things like WiFi, Bluetooth, and cellular 2G/3G/4G networks use two way radio, the signal can go back to the reviving end of the UHF amp, and get broadcasting to hit whatever tower. my phone should better recognize the tower, as if i just magically made a tower 2 feet away. however this might also amplify stay noise. if this idea doesn't work, why not? i think i am going to need at least a 20dB increase in power, but as of now i  need to do more research. but if i can buy a product that does a similar thing for less than $40, i would. http://en.wikipedia.org/wiki/Dead_zone_(cell_phone)#Dead_zones  http://en.wikipedia.org/wiki/Repeater http://en.wikipedia.org/wiki/Wireless_spectrum (cellphones use UHF spectrum) http://en.wikipedia.org/wiki/Signal_booster

Question by -max-   |  last reply


New Horizontal Mag Gun + Unfinished repeating sling

Here's a video of my new gun I'm working on, and some pictures of a new repeating sling that I scrapped.

Topic by jollex   |  last reply


A 8 or 9 letter word or phrase with no repeating letters?

I found a Alphabet Pal at a thriftstore for 1.50 and couldn't help buying it. There are 26 little boots on it each one containing a letter a-z. I am making a project that only needs 8 or 9 feet,but i was hoping to spell something cool out. It is a little bit of an odd creations so weird words are accepted.http://www.flickr.com/photos/purplefourball/2168808682/ click on the link for a picture.

Question by CrawdadMan   |  last reply


How does a Halo Reach: Plasma Repeater work?

If any one has Halo Reach for their xbox or pc, please send me a video of how it works.  I am trying to make one out of knex; I already have a Plasma Pistol and Plasma Rifle.  Taking a video of a screen is ok, as long as the sound is clear.  I need to see (or hear) it firing untill it reaches it's slowest rate.  I have already looked on youtube, and there are no videos of it.  Please post a youtube link of a video you made, or someone else's (if you found one) in your answer.

Question by charge11595   |  last reply


Why or why not does .9 repeating equal 1?

I already posted this as a regular question, but someone told me to make it as a burning question, so here it is: HI! I am wondering if .999...=1? I mean if 1/3=.333 and 1/3+1/3+1/3=3/3 and 3/3=1. So wouldn't .333...+.333...+.333...=1? But it actually equals .999... not 1. I googled this question and I got many different answers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For example...(someone wrote): I'm not really into math, but a friend brought something up to me today that really seemed very strange. (For the duration of this post, .999 will mean .9 repeating unless otherwise specified- just for the sake of ease) .999=x 10x=9.999 10x - x = 9x 9x=9 1x=1. .999 = 1. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Someone else wrote: Numbers are fake. They are a manifestation of our minds to describe something, similar to words. Just because we say "red" doesn't mean something is red. what is red? Languages and math are very similar. Math is universal...at least for our planet though. .999~ does not = 1. But what .999~ repeating represents, does in fact equal what 1 represents. No-one will ever be able to comprehend infinity, os its time to stop trying. Think of space and the universe. IT IS GROWING. how can it continue to grow with no stop? what is there to contain it? WE need something to contain it in order for us to understand it. We need a stopping point, but there is none. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Another person wrote: In your proof that .333...*3=.999... you forgot to include the fact that .3333... is NOT 1/3. 1/3 if not a number that can be turned into a decimal in any way. I thought someone might like to know this fact. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ And the last person wrote: Just a pedantic point the equation for differentiation is given by lim x->0 [f(x+h)-f(x)]/h, it has the minus sign. It is after all just telling you the slope and is no different really from doing simple trig using the tan function. Here you just take a really small triangle. As to the 0.99~ thing, this is really just writing the supremum (spelling might be off) of the numbers less than 1. Just think of it as taking the smallest number 'n-word' than 0 away from 1. They are not identical for if they were we would not have a continuous number line, but rather a dashed one with lots of wholes in it. I could simply argue that 0.99~8 is just as close to 0.99~9 as 0.99~ is to 1. For those who really want to understand go and look up supremum numbers and the axioms of the real number line. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ So who is correct? Do you agree that .999...=1? Or .999... does not equal 1?

Topic by Pizzapie500   |  last reply


Countdown timer doesn't exit and the loop never repeats?

We want to run the stepper motor by 180 degrees and want to repeat it after long delay (say 2 hours or so) with a countdown timer displayed in LCD attached to Arduino. Every thing happening successfully except the loop doesn't start after the countdown ends. #include #include const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution // for your motor // initialize the stepper library on pins 8 through 11: Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11); // initialize the library with the numbers of the interface pins LiquidCrystal lcd(7, 6, 5, 4, 3, 2); int hours = 0; // start hours int minutes = 0; //start min int seconds = 10; //start seconds int stepCount = 0;         // number of steps the motor has taken void setup() {   // initialize the serial port:   Serial.begin(9600);   pinMode(13, OUTPUT);   // set up the LCD's number of columns and rows:   lcd.begin(16, 2);   // Print a message to the LCD. } void loop() {   // set the cursor to column 0, line 0   // (note: line 0 is the first row, since counting begins with 0):   lcd.setCursor(0, 0);   lcd.print("DRUM ROTAING");   for (int i = 0; i <= 100; i++) {     // step one step:     myStepper.step(1);     Serial.print("steps:");     Serial.println(stepCount);     stepCount++;     delay(125);   }   lcd.clear();   lcd.setCursor(0, 0);   lcd.begin(16, 2);   lcd.print("Count Down Timer ");   delay(150);   while (hours > 0 || minutes > 0 || seconds >= 0) {     lcd.setCursor(4, 2);     (hours < 10) ? lcd.print("0") : NULL;     lcd.print(hours);     lcd.print(":");     (minutes < 10) ? lcd.print("0") : NULL;     lcd.print(minutes);     lcd.print(":");     (seconds < 10) ? lcd.print("0") : NULL;     lcd.print(seconds);     lcd.display();     stepDown();     delay(1000);   } } void stepDown() {   if (seconds > 0) {     seconds -= 1;   } else {     if (minutes > 0) {       seconds = 59;       minutes -= 1;     } else {       if (hours > 0) {         seconds = 59;         minutes = 59;         hours -= 1;       } else {               }     }   } } We used break, return 0, continue, etc. but somehow didn't work. Kindly tell how to exit so that program repeats itself. Thanks.

Question by meetshivam   |  last reply


(Sold) Dragon Chu Ko nu for sale (repeating crossbow)

I am selling this beautiful ch ko nu, if you are interested in buying it I have it listed on etsy. Etsy listing https://www.etsy.com/listing/241754073/dragon-chu-ko-nu?ref=shop_home_active_1 Video of it: https://www.youtube.com/watch?v=a-jviBtHyaQ

Topic by Jaycub 


old cordless phone as a wifi signal repeater/booster . Is it possible ?

Well the question says it all. I am just wondering if its possible

Question by SamaritanWonders   |  last reply


PLANS Dragon Tiger Chu Ko Nu Repeating Crossbow

This is a set of complete plans for a Dragon or Tiger "Chu ko nu." To be purchased on Etsy as a downloadable set of files: https://www.etsy.com/listing/272230762/dragon-or-tiger-chu-ko-nu-plans?ga_order=most_relevant&ga;_search_type=all&ga;_view_type=gallery&ga;_search_query=repeating crossbow&ref;=sr_gallery_1    It is an ancient Chinese mechanical repeating crossbow. The plans include the printable dragon and tiger patterns that you glue on to your wood pieces, then cut out and wood-burn the beautiful pattern. Then you can paint or stain it how you want to. It is a crossbow and a sculpture, like a display woodworking item that is also fun to shoot! Assembly instructions here: https://www.youtube.com/watch?v=SCGHTDqgWHU I have been fascinated by this type of crossbow since my early teen years and have been building and experimenting with them for more than 10 years. This set of plans displays my most current and refined iteration. It is very fun to make this and see your own fine work come together, then see and feel the mechanism function smoothly. Very satisfying. To build this you will need some small hardwood boards as will be listed on the cover page of the plans (this wood is available at hardware stores ex: Lowes). You will also need white glue, two wood screws, and one small nail. The plans are delivered to you as a digital download in a zip file with all the pages in it. Tools needed include: Saw (prefer a band saw with scrolling blade, but a thin bladed hand saw can work), Sand paper, Round wood file, Clamps for gluing, Drill with selection of bits, Wood burning tool.

Topic by Jaycub 


Does anyone know of a good way to weatherproof a wireless repeater?

I have a have a router I setup as a wireless repeater with dd wrt. I'd like to make some sort of weatherproof enclosure to put outside my apartment. It doesn't necessarily have to be waterproof since  there is an overhang right outside my door where I'd like to put it. Is there a way to make a a weatherproof enclosure that could be vented? I know I probably could just purchase some low lose lmr cable and put it indoors but I think I would need about 20 feet and lmr 600 & 400 is kinda exspensive. 

Question by purpulhaze   |  last reply



Does anyone know a jamless red rod knex magazine for a repeater? Answered

Does anyone know a jamless red rod knex magazine for a repeater? Clip size doesn't matter, and it isn't neccesary to be removable. If it uses a pusher then don't post it in your answer.

Question by TigerNod   |  last reply