### Leatherman Wave

How long is the leatherman wave closed? Is it 8 inches (that's what the ruler is), or 4 inches? Thanks because this will decide whether I buy or not.

Topic by Wafflicious 10 years ago  |  last reply 10 years ago

### mechanical wave

I'm trying to build a tail of a fake animal, and the tail is kinda long (total length of about 3 feet), I have a 10 pound pull solenoid and I want the tail to kind of do a wave thing, like if you were do a wave with your arms ( not in a group, all by yourself where you hold your hands together, you know what I'm talking about). I know how to do the electronic part of it by sending pulses to the solenoid, but How would I convert that into a believable tail?

Topic by guyfrom7up 11 years ago  |  last reply 11 years ago

### Instruct a wave.

Topic by james.mcglashan 9 years ago  |  last reply 9 years ago

### The feeling of waves? Answered

How do you scientifically explain the feeling of still being in the waves at the ocean or the wave pool after you've left the big blue?

Question by Fizzxwizz 9 years ago  |  last reply 8 months ago

### How to square wave ---> triangle wave?

Currently I have developed a flyback driver that is a semi-cross between a classic ZVS circuit and a 555 type driver, mainly just using a few comparators (one to create a triangle wave and 2 others to respond to the upper and lower peaks and drive MOSFETs. This allows me to create a modified sine wave with adjustable duty cycle.) This topology is even more powerful than the ZVS driver at 12V, as I got some INSANELY thick arcs!! However the MOSFETs get a little too warm, and I was forced to use sil pads to galvanically isolate the drain from the CPU heatsink. They seem to have really poor thermal characteristics as the heatsink stays cold while the transistors get uncomfortably hot within seconds!! To make this thing operate at the resonant frequency of the flyback, I think I will a feedback coil that would get "squared up" using a resistor and zener diode. I need to convert that signal into a triangle / sawtooth wave of fixed amplitude. A simple RC type circuit is not too suitable because as the frequency goes up or down, the amplitude of the voltage across the capacitor changes proportionally.What circuit will allow me to convert a square wave directly to a triangle wave of fixed amplitude????

Question by -max- 3 years ago  |  last reply 2 years ago

### can square wave be transmitted as a radio wave?

Question by arihant 8 years ago  |  last reply 8 years ago

### Is electromagnetic wave can travel with ultrasonic wave? Answered

Is electromagnetic wave can travel with ultrasonic wave.If yes,then how far an ultrasonic wave will travel in air medium.

Question by Rajkumar2506 2 years ago  |  last reply 2 years ago

### Leatherman: Surge or Wave?

Ok, so I want to buy a Leatherman. I have narrowed the choice down to the Surge or the Wave. The Surge has more tools, but you cannot have the file and the wood saw at the same time. The Wave has both. I am swaying towards the Wave at this moment, do any of you have Leathermans and would recommend a certain one?

Topic by knexguy 10 years ago  |  last reply 10 years ago

### possibility of Wave Change?

This theory states (my own be exact) that a certain wavelength can become an amorphous solid using a certain gas, a friend of mine agreed with me. What is your opinion on this matter?

Topic by crc09 9 years ago  |  last reply 9 years ago

### Square wave inverter?

I am building an inverter that will use a square wave pulse to drive MOSFET's at 50-60Hz. I have read and heard a lot of stuff that running square wave into a transformer is not a good idea, what I want to know how bad is it? Also will adding capacitors as seen in my image be able to smooth the square wave a bit to help the problem? If so what capacitance should I use? (About 200A input) (The 12V square wave is coming from paralleled MOSFET's)

Question by The MadScientist 8 years ago  |  last reply 7 years ago

### Will the Waves ever Die?

Think about it, the age is the Digital Dawn of the day, anologue Television is already being planned to me completely removed from the air waves in 2009 to make way for the "supposedly" DIGITAL SUPURIOUR HD crap. I don't watch that much TV to begin with so it doesn't bother me. But what about FM radio, is that ever going to die? Chances are probably not for a few years, seeing how the AM spectrum is still kicking around. How long can our traditional ways last? I'd be fairly sad to see FM leave the game. Really, we've had radio since the dawn of the technical age, from the 40's through the 80's (remember the days?). I just wanna see what anyone else has to say.

Topic by Punkguyta 11 years ago  |  last reply 11 years ago

### is there any option of congo blue gel for my night vision?

Question by balodabazar 8 years ago  |  last reply 8 years ago

### how can i get Congo blue and primary red gel for my infrared vision?

Question by balodabazar 9 years ago  |  last reply 9 years ago

### turn a square wave froma 555 into a sine wave? Answered

I would like to know how to smooth out a square wave to turn it either into a sine wave or at least a triangle wave. Or if it's not possible i would like to know how to make a sine wave generator to use as a lfo thing for a home made synth. Thanks, Josh1324 PS. It has to be analog, im not getting into microcontrollers or anything digital.

Question by josh1324 7 years ago  |  last reply 6 years ago

### Looking for a Google Wave Invite for a friend?

So, if anyone has a google wave invite, let me know, and I can go about sorting my friend out with it. Thanks!

Topic by gmjhowe 9 years ago  |  last reply 9 years ago

### What brings big waves to lake michigan?

Well I'm going to lake Michigan in 3 weeks and their are sometimes huge waves that are 6-7 feet. What brings them in, storms? wind?

Topic by thejrb 10 years ago  |  last reply 10 years ago

### Is there something wrong with my new Leatherman Wave? Answered

So I finally got a Leatherman Wave after finding a good price at a sports store for \$55 (Wave+Croc+bit extension) but it isn't quite what I expected. I've never had a Leatherman before or a large multitool (Wave replaced a Gerber Dime), so maybe this is normal, but it is really stiff to fold at the pivot points. Some people say that it just needs to be opened and closed a lot to loosen it but I would like some advice. I haven't oiled it yet but I'm not sure what kind of oil to use. The tools and knives are ok, they don't require much force, but I am surprised by the folding action. Is the folding action supposed to go different ways? From the pictures I included, sometimes it goes to the right and sometimes to the left.

Question by Arya42 4 years ago  |  last reply 5 months ago

### Is it possible to produce a sound wave that makes us experience silence?

What I mean is: a computer or whatever produces that sound and we can't listen to anything, not even our own speach. That would make us experience TOTAL silence. Is it physically possible? That would rock. :) Thanks, Pedrotome

Question by pedrotome 10 years ago  |  last reply 2 years ago

### How can I pass voltage through a wire only when it goes over 7 volts? Answered

I'm trying to hook up a Z-Wave contact sensor to my home alarms wired contact sensor. The alarm panel seems to provide a constant voltage of 6.8 when the door contact is closed and 13.5 when it opens.  The z-wave module I am connecting however looks for no voltage in order for it to be closed and any voltage for it to be open. So how can I only pass the voltage to the z-wave sensor when it goes over 6.8 volts? I have a ground and power wire running to the respective terminals on my alarm panel. I'm thinking I may be able to wire in a resistor but am not sure if that is what I need or what size. Thank you

Question by Mweston011 4 years ago  |  last reply 4 years ago

### Square wave DC transformer Answered

If I was to feed a dc square wave into a transformer would I get a dc square wave as an output?

Question by workinprogress37 9 years ago  |  last reply 3 years ago

### Does anyone have an English copy of Shrodinger's paper "Quantization as an Eigenvalue Problem"? Answered

I've had a terrible time finding it in English. My German in nonexistent. :-)

Question by Vorenus 8 years ago  |  last reply 8 years ago

Basically, I am currently working on a project using an instructable as a guide. I'd like to share what I've got afterwards, but I'm not sure if the "Photos"-submit-function is supposed to be originals only, or not.

Question by Skelpolu 7 years ago  |  last reply 7 years ago

Ok, you can trade whatever you guys want for wave invites (no money). Rules: 1. No posting emails below, only do it in PM's 2. No trading money/people/animals, only patches or other stuff that you come up with 3. No spamming. I hate the food and hate when people do it. 4. If you dont have an invite, dont say that you have one. That is called lying. I have 8 active invites so if you want one comment below. I will start this off

Topic by robots199 9 years ago  |  last reply 9 years ago

### radio waves for a long range

How to create something for transmitting and receiving radio waves with data(binary code or hex code) for a long range and work with pc? or what material(device) i need for doing it. if have a idea write it. thanks in advance

Question by HosseinJ4 2 years ago  |  last reply 2 years ago

### Uhf and Vhf Radio Waves

Hi i have a problem i need  device for sending(transmitting and receiving) radio waves with data(binary code or hex code) and receive it. what material i need?and how to send data with this board.could i use raspberry pi? i need to boost this signal for 100 km and more .

Question by HosseinJ4 2 years ago  |  last reply 2 years ago

### Variable wave laser devices? Answered

Are there any lasers available to the general public capable of changing wavelength? If so, where can I get one? Is there an easy way to make one?

Question by DIY Emilio 8 years ago  |  last reply 8 years ago

### Half-Wave Rectifier Question?

Hello Everyone, Well, I built a half-wave rectifier using a diode and a resistor, but it doesn't seem to be working as I want. I'm thinking of adding a capacitor to help smooth out the wave, but my whole purpose was to produce a pulse of energy at 60Hz. Basically, to just chop off the lower half of the sine wave. For my diode I used a 1N5406 rated at 600V and 3 amps. The resistors are rated at 20 watts and the whole thing just plugs into the electric outlet. It seems to work ok, but when I take this rectified output and put it into a transformer to step it up to around 1000V thats when I have a problem. After its stepped up its supposed to charge a small capacitor from which the electricity (when built up) will jump across a small spark gap. The spark gap is adjusted correctly, but he capacitor doesn't seem to like to charge on this wave. Its rated 2KV so voltage isn't the problem. The problem is that it will fire once, but not repeat the cycle.  (The transformer shouldn't be the problem because I'm pulsing the dc) Any Ideas? Thanks

Question by transistorguy 8 years ago  |  last reply 8 years ago

### Power Sine Wave Circuit

Hi I am trying to build an economical circuit to power an AC electromagnet. The energy source has to be a battery, preferably less than 24v. The power draw of the electromagnet will be about 500W (the application requires a high-power alternating magnetic flux). I'm thinking of making a sine-wave generator and a simple transistor amplifier with high power transistors. Can anyone suggest circuits for this? My knowledge of electronics is not that great, but I'm quite enthusiastic about this and I believe I can give it a try. Any help will be appreciated. Thanks R

Question by Richy33 8 years ago  |  last reply 7 years ago

### I need a circuit that can convert sine waves to square waves.

I need a circuit that can convert sine waves to square waves that works with a wide range of frequencies and doesn't change the frequency, for a project i am working on. I also need a circuit that can convert square waves to ramp waves that also works with a wide range of frequencies and doesn't change the frequency. Thank you in advance.

Question by Super_Nerd 6 years ago  |  last reply 4 years ago

### square wave input to lvdt and what are the demodulation techniques for square wave? Answered

Question by shruthi mudenur 5 years ago  |  last reply 5 years ago

### I have Google Wave invitations...

...and not many friends who know what it is. I have 15 of them, so is there anybody left who wants one that doesn't have one? Just leave a comment with your e-mail address. If you don't want to post your e-mail, post a comment claiming it and then send me a message. I'll update the count as I send them out. 08 invites left.

Topic by Weissensteinburg 9 years ago  |  last reply 9 years ago

### Tesla's "magnetic wave" communications idea proposed for mine safety

A report in Science Magazine describes a proposal to use Nikola Tesla's magnetic amplitude modulation as a way for trapped miners to communicate with the surface.

Topic by kelseymh 8 years ago  |  last reply 8 years ago

### What do you think of this circuit?

I made a few changes to a circuit, since it's the first time I do this I'd like to know what you think and if there's anything I should change.

Topic by pquadros 6 years ago  |  last reply 6 years ago

### "flute" hole size and spacing

I've got a clarinet mouthpiece and some pvc pipe...25mm but i'm sure I can adapt it bigger if necessary. Is there some elegant equation (like where the natural harmonics on a guitar lie) to calculate the spacing and diameter of the finger holes for chromatic tuning?

Question by timgray 9 years ago  |  last reply 9 years ago

### Home automation system configuration?

I have recently purchased a used home automation system off of eBay. The whole package included the following items. 1. Amber Wireless AMB8425-M USB Stick 2. Aeon Z-Stick S2 USB Stick 3. Huawei E173u-2 Boradband USB stick 4. 3 x Zwave Socket adapters 5. 7links NAS Print/ USB Server Photos of these modules can be seen below. The seller was not aware how all these modules can be put together into a home automation system. I googled for sometime and figured out that I can setup an indoor automation solution using only the Aeon-Zwave USB and the Z-Wave socket adapters, and control them using my android phone. Can someone please help me how can i use the remaining modules and setup the automation for remote access as well ? Many thanks

Question by muhammajunaid 4 years ago  |  last reply 4 years ago

### Full Wave and Half wave rectifier (220 Volts AC to 5Volts DC) ? Answered

Hello, I have to make a Full wave and half wave rectifiers which step down 220 volts~ AC to 5 volts DC.  I am pretty aware of the circuit diagrams , I would appreciate anyone helping me with the exact diodes and transformers i need and where i can get them.  Please do let me know about a SAFE circuitry

Question by ParanoidAditya 4 years ago  |  last reply 4 years ago

### Dry ice in microwave?

What happens when you put dry ice in a micro wave? Im just wondering cause a local grocery store is now selling dry ice for Halloween effects (yes i know they cant sell to minors).Are the result any thing like this? (i dont think that microwave was turned on)

Topic by i make shooting things 11 years ago  |  last reply 11 years ago

### Need help with signal generator 5kHz and 8.7 kHz

Hi, I'd like some help. I'm trying to make a simple signal generator that will produce a 5kHz and an 8.7kHz square wave signal. I have some basic (very) electronics skills, and know how to follow a schematic and solder things up. The ones I've found online are outdated, using obsolete IC's. Any help would be appreciated. Thanks in advance.

Topic by NorthWind 8 years ago  |  last reply 8 years ago

I would like to mod a handheld radio (or even a analogue tv but radio would be better) to get to listen to higher frequencies than normally available. I'd Like to hit the 1420Mhz mark approximately but with little electrical engineering or architecture experience, I'm not certain how? Which might make a TV easier to get there as UHF covers that right? (still safer to play with a battery powered radio than a 240V powered one) I figured there is someone out there with the ability to figure out what components need changing? The variable resistor that tunes it perhaps? If you'd rather post an instructable I'll follow that or just tell me what needs replacing with what? Any Ideas?? Thanks

Question by Mr E Man 5 years ago  |  last reply 5 years ago

### Schematic needed for square wave generator.

I need a schematic and the code for a square wave generator, with the following specs (although it is a bit specific) Repition Rate (external trigger, 20 Hz 200 Hz 2KHz 20 KHz 2 Mhz and 5 MHz) controlled by a rotory switch. a vernier (pot) controlling pulses per second.) a single shot button (N.O. push button) external trigger (BNC Connector) Delay (Rotary Switch)  .1, 1, 10, 100, 1k, and 10k microseconds Vernier (pot) for the delay a sync output (BNC Connector) with a toggle switch for polarity. double or single pulse on the output (toggle switch) polarity selection on the output (toggle switch) gate on off (BNC connector and toggle switch) 10db step (on or off toggle) 50 ohm load on or off (toggle switch) rise and fall time (pot) Any help would be greatly appreciated, as this is a bit specific. I only need a schematic, and everything else i can take care of. Once again, Thanks for the help.

Question by mchp82 7 years ago  |  last reply 7 years ago

### How to biuld a sine wave inverter?

I need to build a sine wave inverter but i do not have the schematics.I need an assistance in this project.I can build a square wave inverter but it makes noise in the fan and does not surport my 29 inch television causing it to have frequent low current  problems.I heard that sine wave inverter is more efficient for home appliances.Please can some one help me with a simple diagram to build my own efficient sine wave inverter.Thank you all.

Question by 9 years ago  |  last reply 7 years ago

### Measure triangle wave with DC ammeter

If I measure a positive only triangle wave with an analog DC ammeter will it give me a relatively accurate current measurement?

Topic by kenw232 5 years ago  |  last reply 5 years ago

### If an aerial turns EM waves into current...

Can you put current into an aerial and have your own radio generator?

Topic by lewiso1 12 years ago  |  last reply 12 years ago

### any facts on radio waves....asap?

This would b excellent 4 science.

Question by cheezies 9 years ago  |  last reply 9 years ago

### Powering a device from radio waves?

I was just curious, but I was told someone was arrested fpr powering their house from a tv signal (illegal I know), but I was wondering if there would be any case where it would be legal to utilise my own RF signal as the source of power for some devices, and how is it possible?

Topic by MoonDemon 12 years ago  |  last reply 12 years ago

### Powering a device from radio waves?

I was just curious, but I was told someone was arrested fpr powering their house from a tv signal (illegal I know), but I was wondering if there would be any case where it would be legal to utilise my own RF signal as the source of power for some devices, and how is it possible?

Topic by MoonDemon 12 years ago

### Powering a device from radio waves?

I was just curious, but I was told someone was arrested fpr powering their house from a tv signal (illegal I know), but I was wondering if there would be any case where it would be legal to utilise my own RF signal as the source of power for some devices, and how is it possible?

Topic by MoonDemon 12 years ago  |  last reply 8 years ago

### A day in the life of a new wave costume.

I had to do something for Halloween so I threw this together this morning. I had no idea what I was but my coworkers decided I was new wave. So here's what I did in my costume today. (About half of them are posing. What else was I supposed to do?!) #1 - I started to get ready. #2 - I got bald. #3 - I cleaned the litter box. #4 - I ate some appropriatley colored sherbet. #5 - I did my best Marilyn Monroe impression. #6 - 8 - I posed. #9 - I posed with Ms. Jade Pants. Because it's her birthday! :D #10 - I posed with other people! Left to right - Delores + tatto sleeves + B. Dingle, Death, Me, a demented zombie Nurse, Buckethead. #11 - I did the nightly paperwork while looking very spaced out and then went home.

Topic by jessyratfink 11 years ago  |  last reply 11 years ago

### Sound wave heart beat detection

I love to graph things. Everything from outside temperature to server room temperature to the number of users on the network to my weight.I just read an article in Make magazine about DIY ECGs, and it got me thinking.. i want to graph more things about my body :)Would a microphone embedded in the bed be able to pick up the heart beats and calculate the BPM? This way I could graph development in resting heart rate over time. The microphone would pick up lots of noise from the person moving around etc.. but that doesn't mather. It only needs to get a few clean heart beats in order to calculate the bpm, right?What hardware and software would be suitable to create something like this?Any ideas?Yeah, of course there are other more traditional ways of measuring heart beat.. but I'm to lazy to do that.. I'd rather spend some time making a fully automagickal system.

Topic by chr 11 years ago  |  last reply 3 years ago

### Why is a modified sine wave harmful to electronics? Answered

I was reading an article in a computer magazine about UPS (Uninterruptible power supplies). It said that UPSs produce a modified sine wave. However it said that using a modified sine wave to operate computers over long periods is harmful. I wonder how a modified sine wave could damage a computer. All it is is just a sine wave that steps instead of a perfect curve. Right?

Question by Super_Nerd 7 years ago  |  last reply 7 years ago