What is the average range for one of these ?

Posted by Katarukito 9 years ago

Wanted: Help building and programming a detection system

I want to be able to know when my daugher and son enter the house, omit one on request and setup different identifications for each. I would like this to be an independent device (built for this exact purpose) no app for PC/Phone.  

Posted by Sovrac 7 years ago

wifi issue

I PURCHASED MY MOTHER, who lives 200 ft from me, a DSL subscription to share. The phone company innstalles a WESTELL 327w router and I have a sony Vaio VGN-NW310F laptop.  Even though we had no clear line of sight, I still occaisionallyy got one and RARELY 2 bars.  The 1st thing I did was bought a Hawking HWUN3 wifi booster which plugs right into my USB. Great idea in theory, but it made no difference and was possibly even worse.  Plus, Hawkings Customer service is absolutely heinous, pitiful, and incompetant.  So I returned it. Funny...when i bought, it took 5 minutes for them to extract the money from my account, but 6 weeks to return it..but I digress. I then upgraded the antenna on her router with a LINKSYS HGA7S 7dba antenna which helps a little, which is to say I get 1 or 2 bars more relliably. I can get email but the signal is still too iffy to do much else. question is this:  I am willing to mount something outside and run a USB cable inside, or is there something INSIDE that will pick up/amplify or carry the signal to the laptop - either by means of a USB cable or not?  Also, is there software required? I am a disabled vet and this laptop is one of the few things I have, so I need help!  I'd prefer responses to my email, jb0579@yahoo.com  (and that's a zero after the 'b', not the letter 'o'. what can I do to get  a stronger AND more reliable signal?  As Ferris Bueller's teacher Ben Stein would say..."Anyone?.....Anyone?....." What's my best option here, folks?  Also, if there is a better place on this or any other site to post this, lemme know!!! Jim

Posted by jb0579 8 years ago

Deriving the maximum range and angle of a projectile

In a thread in the Green group, AnarchistAsian and I were discussing his coil guns. I posed the question of what range he could get, and he asked me to go through the physics derivation. Here it is, simplified to require just algebra and trig.The kinetic energy of the projectile E = ½mv2, gives v = sqrt(2E/m) as the speed at launch. Let θ be the angle at which you launch (θ=0° is horizontal, θ=90° is straight up). Then you can decompose the speed into two components: vh = v cos(θ) is the horizontal speed,vv = v sin(θ) is the vertical speed.Gravity only pulls vertically, so the projectile's vertical speed will be slowed down until it reaches its maximum altitude, then it will fall back until it hits the ground. The horizontal speed will remain constant until it hits the ground and stops. To figure out the range, you need to know the time t that the projectile flies before it hits the ground; then the range is just R = vhtEnergy conservation guarantees that it's downward speed at the end is equal to its original upward speed, just with a change of sign. That also means that the total flight time of the projectile will be half going up and half going down. Once you determine how long it takes to reach the top of its flight, you're done; just double that answer :-)In the vertical direction, the maximum heightH = vvt - ½gt2(you need calculus to derive this result). From energy conservation, the initial kinetic energy in the vertical direction, Ev = ½mvv2 must equal the potential energy at the top of the flight, Pv = mgH:mgH = ½mvv2H = ½vv2/gSubstitute this on the left hand side of the trajectory expression,½vv2/g = vvt - ½gt2vv2 = 2gvvt - g2t2vv2 - 2gvvt + g2t2 = 0(vv - gt)2 = 0vv = gtSo, t = vv/g = v sin(θ)/g is the time to reach maximum height. Double that as discussed above, and you get the range R = 2 sin(θ) cos(θ) v/g.Work out the angle that gets you maximum range by just plugging in different angle values and finding the one that is biggest.

Posted by kelseymh 9 years ago

Kitchen: under cabinet lights wire to range hood light

I just removed some halogen puck size under the cabinet lights in our kitchen.  They worked but required to plugged in. Unsightly and I lost an outlet in a high demand spot.  I guess I could start putting holes in the wall and attempt to wire it to the outlet but the damn things don't have an on off switch just plug them in and they are on.  Stupid (they predate my living there).  I did find some nice LED battery powered units that work fabulously for ME.  My wife on the other hand turns them on and then walks off.  Fresh batteries in the morning and dead batteries at night.  Fortunately the one we use the most is rechareable. Here's what I'd like to do but I'm rubbish with electricity and lighting so need someone smarter to tell me how. I want to put LED lights under the cabinets for additional countertop lighting.  I'd like to have them wired into the light in the range hood and controlled by the switch that controls the light inside the hood.  Turn on the hood range light and the LED lights come on too.  It seems simple to me but many things have and not turned out that way.  I assume some sort of transformer would have to be mounted somewhere unless they came built into the base unit.   I'd be open to florescent lighting if it makes it easier. I haven't seen this instructible on the site.  If it is thanks for reading, please disregard and point me in the right direction.  I have the hardest time sometimes trying to find something specific for some reason. TIA Danneauxs

Posted by danneauxs 3 years ago

Ultrasound 3D positioning

How would you use an array of ultrasonic sensors to determine the 3d position of an ultrasonic transmitter. Basically i want an ultrasound transmitter on my hand that gets picked up on an array of 5 or so receivers that outputs the position via usb.

Posted by redshirtdeath 7 years ago

are these sufficient specs for a multimeter?

These are the specs off a multimeter im about to buy. are these enough to do electronic projects off instructables.com, fixing electronics, and etc? if not then what do i need then? thanks DC Voltage: 200mV-1000V AC Voltage: 2V-700V Temperature: 20°-1000°C Resistance: 200Ω-20MΩ DC Current: 2mA-20A AC Current: 20mA-200mA Capacitance: 2nF-20µF Frequency: 10Hz-20kHz  

Posted by leader1 8 years ago

RC Drone Anteanna Mod Help needed

Hey i got a Syma X5C Clone called Trooper 150. i wanted to do the antenna mod of a old router but came to this problem. i dont know whice one to use for ground. there is a solder point. but on the other side it has smal transistors on it. so im not sure if that is ground for an antenna http://i59.tinypic.com/2n6x4kh.jpg http://i58.tinypic.com/2mg4av5.jpg Notice there are small transistors on the other side of the solder point http://i58.tinypic.com/2cym7pz.jpg

Posted by vinootje 3 years ago

Ranges on a knex gun gone wild!

There is no way that a knex gun can reach 60 feet using the simple ram mechanism. Ive made the NAR and fired it using 3 brand new #64 sized rubber bands and ammo with fins! It did NOT reach 100 feet or even 60. The NAR only reached 50 feet.Ive also built the TR Sayer and TR 8. They also did not reach the length that the owners claimed. Its really sad that people are putting high ranges even though they're all a lie! What do you think?

Posted by DELETED_Blue Mullet 6 years ago

Seeking advice on boosting range of fm transmitter (from a kid's toy)

Hi all, I just bought the Smartlab: You Build It - Rock Star Microphone toy from a Goodwill. It's a great toy; it has a microphone that let's me transmit my voice over the radio (perfect for a Halloween haunted house when the static-mad radio bursts to life with terrifying voice-overs!!!:) works but only up to about a six foot range.  I would like to be in a different room and use the microphone but I need to boost the range considerably - I understand that the FCC has rules about this. Moving forward, I don't know how to do this (at all....). Are there commercial range boosters that I can use? Are there mods that someone can recommend? Are these toys designed to NOT transmit beyond six feet even with mods? I wish I could give more information about the tech specs of the toy but I will have to try to de-solder the metal plate covering the circuit board (plus I don't know what specs to look for yet). Advice appreciated, DAZU

Posted by damianzuch 7 years ago

knex morter need help

I was wonder has any body made one because i was building one that folded into itself and had the abilty to fire things using fire works and rubber bands but the problem was when i but the rubber on in exploded its now completely destroyed so has any built one because i would some tips on builting the mortar

Posted by The ironman 7 years ago

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!

Posted by kydan 8 years ago

Airzooka into a nerf long range rifle?

I purchased an "AirZooka" a while back at just got into nerf. I'm about to transform the airzooka in to a nerf rifle. I'll post comments latter on the results. Think it'll work?

Posted by Wafflicious 9 years ago

Small proximity sensors with short range and alarm either IR or RFID

I would like to make two key fob sized units that if brought within ~20cm of each other would sound an alarm from one of the units. I've seen a pair of key fob sized RDIF alarm tags that sound an alarm in one if moved more than ~10m apart. They sell for ~$50 US but I need something that accomplishes just the opposite from this device. I want to keep two pets away from each other (one bullies the other) and such a device would I believe accomplish this task. It seems like it should be relatively simple to design but I'm an artist and machinist and know little about electronics. I purchased a book entitled Practical Electronics for Inventors that has given me some knowledge about the basics of transformers, relays, capacitors, resisters, etc. but nothing on IR or RFID transmitters/receivers. Everything I read about RDIF is geared towards one stationary reader (or large hand-held unit) and one or more transmitters. I made one collar with an IR receiver from an R/C car and a small piezo alarm that would sound when I pushed a button on a remote. This works but only if I'm in the same room with the offending animal. I need something that works when I'm away or the animals are upstairs or in another part of the house. They are indoor only pets so the device need not be weather-proof. Anyone with knowledge of such things want to lend me a hand?

Posted by bigdaddyjt 8 years ago

Why you can never have a "true" knex semi auto with decent power/range.

Ok here goes I will try to simplify my theory down a bit so everyone can understand: basicly energy cannot be created or destroyed, it can only be converted, eg kinetic into heat, chemical into kinetic ect. Knex guns are no exception, the enery has to come from somewhere, in most guns this takes the form of pulling back a pin or rubberbands to create potential energy, this is released when the trigger is pulled, this potential energy is converted into kinetc energy and this is how the bullet is fired. A semi automatic gun is required to fire every time the trigger is pulled, but the energy still has to come from somewhere. RBG's take this into account as each band is pulled back and has potential energy stored, however many knexer's opinions differ on whether this is truly semi automatic, many calling this type of gun a psuedo semi auto. Other guns use the energy imparted on pulling the trigger to create the potential energy to power the bullet, this is considered to be a true semi auto, however the main drawback of this system is that the amount of energy that can be transfered from the trigger to the bullet is very limited, therefore this type of mechinism has limited power. So if the problem is energy how do we solve this? one possible answer is to have an extra source of energy, such as a motor or a winding system that puts extra energy back into the system, however this approach will not give you a "true" semi auto as you will have to have an external source of energy, that and the fact that knex motors do not have the power and torque needed for this system. So what's your opinion, do you have anything to add?

Posted by Fred the Penguin 8 years ago

longest range knex gun

I want to know what the longest range knex gun on here is

Posted by Jesus. 9 years ago

Knex Gun Range

Which knex gun gives me the best range with rubber bands as ammo: rods as ammo:

Posted by shahrukh1 8 years ago

Paper Airplane Contest 4 (Closed)

Yes, I have decided to host another paper airplane mini-contest. My goal is to further stimulate the paper airplane channel and encourage more paper airplane builders to post their innovative designs. For this contest, the specification is for a long range plane. Requirements: 1. Aircraft Requirements: • Ability to fly at least 55 feet • Durability to fly at least 30 flights • Provisions for landing gear and/or skids (not required for flying wings) • Use of less than 11 inches (0.381 meters) of Scotch tape in construction • Use of less than 3 pieces of 8.5 by 11 inch (A4) paper in construction • Usage of glue or wood (excluding toothpicks) is prohibited 2. Instructables Requirements: • 1 page strictly devoted to materials required in construction • 1 page explaining how to fly the aircraft • The instructable's license must be: "Attribution Non-commercial Share Alike (by-nc-sa)" • This sentence and link must be displayed on your entry's intro page: “This instructable is an entry in Paper Airplane Contest 4 (https://www.instructables.com/community/Paper-Airplane-Contest-4/)." Prizes: For this contest I will award the publishers of the top 5 performing paper airplanes* one patch each. The first place winner will also receive a 3 month Pro membership. These patches will be medals (1st place, Patch with 1st Place Medal image and 3 month Pro membership; 2nd Place, Patch with 2nd Place Medal image; 3rd Place, Patch with 3rd Place Medal Image; 4th Place, Patch with 4th Place Medal image; 5th Place, Patch with 5th Place Medal image). *Multiple entries are allowed. To keep the distribution of patches wide however, each entrant can only win one prize. How To Enter: To enter this contest, you must send me a private message entitled “My Paper Airplane [Member Name Here]” with your instructable's URL included. I will then put the link and author's name onto a list on this topic under "Entries". Judging: For this contest, I have decided that I will judge all the planes myself based on abilities. I have decided this way because I believe judging on performance rather than shape is a more objective approach. The contest begins Friday, April 15, 2011 and ends Monday, May 16, 2011. Entries must be published before Monday, May 16, 2011. From May 16 to May 18, I will be judging all entries. I will announce the winners of the contest on Thursday, May 19, 2011 and issue them their prizes Friday, May 20, 2011. Entries:

Posted by OrigamiAirEnforcer 7 years ago

What is the best compact k'nex gun to make with very good range?


Posted by zchan1120 8 years ago

Knex VSS Vintorez review!

Hello, I'm doing review on the VSS Vintorez by "KnexStealth Lets get to it! Power: 8/10 Range: 7/10 (Maybe) Strength: 10/10!!! Comfort:8/10 Looks:10/10 IMO (Parts of gun) Scope 9/10 Handle: 7/10 Butt: 9/10 Fake barrel: 10/10 So I hope you agree on me with this! :D

Posted by Vynash 9 years ago

Selling Nerf Stefans (Darts)

Honestly I have just found out that instructables has a market place! Sorry for posting this as an instructable! Anyway I just copied all of this from my instructable: Hey Guys! I'm selling nerf Stefans (darts) for very cheap! Every Item is FREE SHIPPING (to the USA)! The prices are: $8 for 25, $14.50 for 50, $19 for 75, $23 for 100. If you live out of the USA pm me and we can negotiate a shipping cost. Also, if you want more than 100 bullets pm me. Buy it at FarmHobbies.Weebly.com. Thanks to TCBM on YT for the clip of it in action. EDIT: I changed the tip of the darts!!! Now they're more aerodynamic thanks to the dome of hot glue! Here's a picture of what they look like now: http://farmhobbies.weebly.com/comparison-of-new-and-old-darts.html.  I only except paypal right now, also please just buy them at the website i mentioned don't ask to pay with cash or something... ALSO I sell modified Nerf Guns just like Twisted, although I don't paint them...

Posted by Pizzapie500 8 years ago

Paper Airplane Contest 2 (Closed)

In hopes of seeing more paper airplanes and innovative designers on Instructables.com, I have decided to host a second mini-contest. My goal is to stimulate the paper airplane channel and encourage more paper airplane builders to post their innovative designs. Requirements: 1. Aircraft Requirements: • Stability at all operation speeds • A minimum glide range of 30 feet (9.144 meters) • Durability to fly 30 feet or more after 15 flights • Use of less than 15 inches (0.381 meters) of tape in construction • Use of less than 5 pieces of 8.5 by 11 inch (A4) paper in construction • Ability to carry at least 6×100mg toothpicks • Provisions for landing gear and/or skids 2. Instructables Requirements: • 1 page strictly devoted to materials required in construction • 1 page explaining how to fly the aircraft • The instructable's license must be: "Attribution Non-commercial Share Alike (by-nc-sa)" • The sentence and link (see below) publicly indicating the instructable’s acceptance into this contest The sentence which must be displayed on your intro page: “This instructable is an entry in Paper Airplane Contest 2 (Instructable URL).” Prizes: For this contest I will award the publishers of the top 5 performing paper airplanes* one patch each. The first place winner will also recieve a 3 month Pro membership. By default, these patches will be medals (1st place, Patch with Gold Medal image and 3 month Pro membership; 2nd Place, Patch with Silver Medal image; 3rd Place, Patch with Bronze Medal Image; 4th Place, Patch with 4th Place lettering; 5th Place, Patch with 5th Place lettering). If the winners of the patches would like a different image, there will be a 24 hour period between the announcement of the winners and the awarding of the patches. During this time, the user would need to send me a private message with their desired picture. *Multiple entries are allowed. To keep the distribution of patches wide however, each entrant can only win one prize. How To Enter: To enter this contest, you must send me a private message entitled “My Paper Airplane [Member Name Here]” with your instructable's URL included. I will then put the link and author's name onto a list on this topic under "Current Entries". Judging: For this contest, I have decided that I will judge all the planes myself based on abilities. I have decided this way because I believe judging on performance rather than shape is a more objective approach. The contest begins Friday, January 14, 2011 and ends Monday, February 14, 2011. Entries must be published before Friday, February 11, 2011. From February 11 to February 14, I will be judging all entries. I will announce the winners of the contest on Tuesday, February 15, 2011 and issue them their prizes Wednesday, February 16, 2011. Current Entries:

Posted by OrigamiAirEnforcer 7 years ago

Long Range UHF RFID Integrated Reader

Hi, I am Planning to develop Long Range UHF RFID Integrated Reader which can Read Multiple Tags at a time (range between 8- 15 Meters range) and send information to my web application to store data, so will you plese let me know the components which i need to use along with assembling process. Thankq

Posted by bikhanpersonal 1 year ago

Adjustable Signal...radio, bluetooth, etc.

I am trying to figure out how to control a device that will be "off" while in the range of a transmitter (short range...under 10ft) and then turn on when it goes beyond the range of the signal. I would also like it to be an adjustable range. I was thinking the device would be "on" constantly as the transmitter tells it not to activate, but once it leaves the signal range it would activate.  Any thoughts? Thank you in advance.

Posted by milkyway312 4 years ago

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?

Posted by arourke1 4 years ago

DragonflY Assault Crossbow

Pictures have been taken, Instructable will have the Y-shaped bow and a normal shaped one. Stock and scope will be optional. And uh...yes these things actually hurt...I shot a few arrows into my own leg..just so I could feel how much it would hurt xD Instructable will up soon, need to find some time to write it.

Posted by Wicky 9 years ago

Out of range alarm

I'm working on a project where I need to have a transmitter and a receiver with an alarm, so when they are apart a certain distance the alarm goes off. I need the alarm to be attached with the transmitter not the receiver, where it will be attached to a valuable stuff for example.

Posted by AmmarK22 9 months ago

Targus Wifi Scout range????

I have a targus wifi scout and I would like to extend the range of it. I have tried a few different things, and nothing seems to really work. Does anyone know a good reliable way to extend the range of this device without throwing it away and buying a better one. I got this one for free and dont mind messing it up if I have to though. LOL Thanks for reading. Have a good one.

Posted by Morte_Moya 11 years ago

Long Range Locators Metal Detector

I'm Looking to build of long range locators for search gold. Please help me with an idea to pick which is a good kind of instructables match for device-search coil/ antenna, transceiver, frequency meter/ counter, vibration, light led, radar, and gps. I'm looking to forward hearing from  someone as soon as possible...!!!

Posted by Jasun 3 years ago

Best long range knex gun?

Hey i just want to know what knex gun shoots the farthest that isnt overkill on pieces. Any recommendations?  Thanks!

Posted by T-man 7 years ago

Auto-Loading 10 Shot Rifle Review *By Ratchet and Clank*

Hey guys! Today, I'm going to be reviewing a 10 shot, auto-loading rifle by Bannana Inventor. Some notes before I start. -All credit goes to the builder, not me. -I'm rating on a 1 to 5 scale. -I review guns by request.(the dragonuv is up next) Ok. Now that you have that. I'll start the review. Handle/Gripping-3.8 The handle could have been a little slimmer. Plus there isn't really a good front grip-type-thing.(Yes. I had no word for that situation.) Range-4.5 Pretty good, especially for its size, and the fact that it is a magazine-fed gun. I got mine about 35 feet. Accuracy-5.0*** One word- Pinpoint. Power-3.0 It's power is restricted, since the bullet is so light. But for the bullet, it has some power. Body/weight balance-5.0*** Great balance throughout the gun. The body isn't flimsy. Stock is comfortable. But on a note, which was stated by The Jamalam, it was made by him and used on his storm guns. Credit goes to him. And now one word. AWESOMENESS!!! Reliability-4.0 Since the magazine uses blue 3-d connectors, you have that millimeter sized jut on the inside of the magazine. So, the magazine sometimes jams, but you only have to push up slightly on the magazine ram. OVERALL-4.2!!!!!!!!!! Overall, great rifle. Auto-loading is a good feature, and a true trigger pleases a lot of k'nexers. Take those, and you get a gun like this. One of Bannana Inventor's best. Review by Ratchet and Clank. Gun by Bannana Inventor Thanks for reading this review! I hope you enjoyed it! Good luck building this, becouse this rifle is a must in your arsenal.

Posted by Ratchet and Clank 10 years ago

Long Range Locator Metal Detector

 I'm looking to build of long range locators for search of gold. Please help me with an idea to pick which is a good kind of instructables match for device-search coil/ antenna, transceiver, frequency meter/ counter, vibration, light led, radar, and gps. I'm looking to forward hearing from someone as soon as possible...!!!  

Posted by Jasun 3 years ago

Long Range Wifi Antenna

Can anyone recommend a good instructable to boost the reception range for my computer's wifi device? I know there are tons of them on here already, I just need to know which ones might have the longest range. Another thing is what design would be best. The kind involving a parabolic dish/mesh to direct signals to a usb dongle. One that is more of an omni direction antenna. One that makes use of one of the old sattelite tv dishes sitting in the garage. Requesting advice, comrades.

Posted by Kozar 7 years ago

Boosting Fm transmitter range

I bought a FM transmitter for an ipod. I would like to boost the range of the device. (I know it is illegal but would like to get more range than 2 feet.) I think I need to build an external antenna but need to know where to hook it up to the thing. The transmitter I have is a ge FM transmitter for ipod.If anyone has done anything like this or have any useful links it would be great. I don't know anything about circuit making so help would be great on that as well.

Posted by thejrb 10 years ago

knex catapult contest

Alright. You read the title. This is a catapult contest. The things that will make you win are: Simplicity and Range. Try to get as much range as possible and/or make it as simple as possible. Now get started!

Posted by jamesdude 8 years ago

Please try to add a "sort by date" or "date range" to your instructable search

Or possibly just place the date an instructable was submitted in its info when you look at the results of a search - it would help Thanks

Posted by jimmyboy111 5 years ago

Increasing the range of an RFID implant

So i was already planning on making both my cars keyless with RFID technology and possibly the house door to and i stumbled upon RFID implants. now they are pretty new to me but every thing i have seen on them, they are only able to be read at about 2 inches away.  With a good enough reciever could i increase that range to work better for my applicatiion?

Posted by ZACKHICKMAN501 7 years ago

(EMP generator)How can i make a long range EMP generator?

I have watched many video in youtube about, how to make EMP generator. But those EMP's range are really small, I want to make a EMP that can disable any electric device around me like, Disabling all the device in my room. So can Anyone help me with this??

Posted by harryt47 21 days ago

large range!!

I just made a gun with a 10 bullet magazine that shoot's 72.1784778 feet!!!!!!!!!!!!! with four rubberbands!!!!!! I think it can hold more but I haven't tried yet. What I wanted to know is how to make a good measurement system for proving range, I would appreciate if someone could tell me. (Also I told people my oodammo sniper shot 90 feet, this was a mistake, I thought a meter was 4.5 feet). I will soon post a video proving the (unangled) range. Edit: I will not post the video since there is so little interest

Posted by Mr. Muggle 8 years ago

USB wifi range extension QUESTION

So if I understand. I should try a USB cord and check if my reception is better. My laptop is wifi ready I'm 20 to 30 feet away. And to think I live in Palo Alto. Matt

Posted by And to think... 11 years ago

Air soft or BB gun help

Can someone please help me to make a easy, good ranged and reliable airsoft gun or bb gun with detailed trigger layout the bb and airsoft guns on instructables are great but i would like a gun with a higher range THANKS EVERYONE and please help

Posted by lukeRAMBO 11 years ago

Knex Suggestions

Any knex suggestions post here, ranging from guns to anything!

Posted by hunter999 5 years ago

Long Range Hybrid Crossbow

HERE IT IS. The Brickster LDS is a hybrid crossbow. It doesn't have a bow. It has a range of 250 to 300 feet with 16 to 32 rubber bands. It is extremely strong and could hold about 80lbs of force. The arrows are smaller than an average crossbow arrow so they fly slightly faster. It has no track so it is a slingshot type crossbow. Will be posted in a month or 2. Amazingly powerful. Has over 800 pieces and a Ballista attachment that rolls and keeps it at a 30 degree agle with the ground. Low piece and a great gun, If only I could show you. . . . . . . . . . . WAIT, I CAN!!!!!!!!!!

Posted by Electroinnovation 9 years ago

speaker drivers

I'm looking for speaker drivers within 40mm-50mm and a full range frequency response of about 0-25khz But! i cant find any manufacturers within the uk at a cheap price or decent frequency range btw its for a headphone project im working on :D All help greatly appreciated (:

Posted by 00mike000 9 years ago

help needed on LED music box

I want to build one like https://www.instructables.com/id/Music-LED-Light-Box/ , but with some LED only blink to bass (low range sounds), some to mid range, and some to only high range. Take this as an example: https://www.instructables.com/id/Music-Flashing-LED-Lights-how-to/ except I still like the idea of running through a mini jack. I've done a lof reading and many people have suggested using inductors as low-pass filters. New to electrical things, I am really unsure what to do. My design in mind is with 24 LEDs, 12 blink to bass, 8 blink to mid range, and 4 blink to high range. I'm planning to use a 12v DC charger with LEDs specs of 30mA forward current, 3.5V forward voltage. I understand having a VR will make the LEDs more consistent. Can someone possibly draw me a schematic with the right resistors and inductors? help would be greatly appreciated.

Posted by robertmai 7 years ago

Bottle roller help

So i have bottles ranging from 60ml to 500ml that i'd like to make a roller for mixing. The issue is that the only mixers like this are in the $1,000 and up range, it's honestly criminal. see here http://amzn.to/2h6gHYG Anyone have ideas for parts to make a super cheap version of one of these?

Posted by Jollyriffic 1 year ago

help me

How can you increase a bluetooth module range(hc 05)???i know it range around 10m.I want it to be 50m because i need it for a rc plane project.

Posted by Alexander heron the inventor 2 years ago

The Brickster 2 SLDS

GUESS WHAT? I just finished my newest project, the Brickster 2, Super Long Distance Sniper. I estimate it shoots about 290' using my new arrow design. Unlike the Brickster, this has an open top and bottom instead of sides, and the rubber bands are fed through each arm. It makes for easier loading and smoother firing. Also, this mega-beast is almost TWICE as long as the Brickster. It is VERY piece efficient because each arm uses yellow and green rods instead of white and blue. I should post pictures and a video or two in a week and the Instructable should be up in a month. Hit subscribe so you know just when it's posted.

Posted by Electroinnovation 9 years ago

Short range battery operated 2 part (door alarm type) distance sensor.

Hello all! I'm looking to design a range compact distance sensor that will sense 1-4 ft increments. If necessary i could modify a door alarm. id like to fab one or multiple if need be to sense the distances noted. I could utilize a buzzer or some way to record a voice that would alert to said distance. The battery voltage max is 4.2v dc and if it could be rechargeable that would be a plus. Any help on this would be greatly appreciated. Thanks!

Posted by Automan350 11 months ago