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For sale is some Fox Crystals (55.8MHZ) and a crystal assortment. Thanks for looking. 

Topic by tinstructable  

Casting Crystals?

I want to fabricate and cast crystals to then cast in glass. I've done glass casting before, but not much mold making. If I have a wax positive, I can melt it out of the plaster/silica mold so it doesn't have to be a 2-part mold as long as there aren't any undercuts, which there won't be. My question is how can I fabricate and then cast crystals to then cast in wax to make my glass mold? I'd like to work with silicone since it is flexible and then I won't have to make a 2-part mold. I thought about cutting foam to make the crystals, but I want the edges to be very smooth so that the glass casts look like crystals. I also thought about carving glycerine soap and casting that, but not sure how it would hold up to being cast with any flexible mold-making materials like silicone. Any advice?

Question by shortone    |  last reply

"Standard" Crystals? Answered

So, I was browsing the electronic goldmine today, and I came across these. What do they do and how are they used? Do you apply voltage to the leads and it emits rf in all directions or what?

Question by LiquidLightning    |  last reply

Crystal Speakers? Answered

I'm planning on building myself (or modifying my existing one) to create the ultimate workspace and among the several features I have planned (usb hub etc) I have one particularly tricky one, I'd like to integrate the desk with a speaker system but massive drivers wont cut it on such a small surface area. I had recently seen a speaker system that uses glass or crystal vibrating to create amazing sound, I was wondering how I'd shape such crystals and if anyone has any general ideas on the design of the speaker system  ? 

Question by Douglerful    |  last reply

Copper Crystal Metal

Hi, Please assist. I am looking for ways to create copper crystals from copper sulfate liquid by using chemicals only. I found a company in South Africa that's doing exactly that.

Topic by CrystalCopper    |  last reply

Crystal circuit board ?

Can crystals ( quartz, ruby , amethyst, etc.)  be used in technology to amplify power? keep power sustained, renew power or something ? 

Question by AlexxSolace    |  last reply

Crystal Shortwave receiver

Help!! On how to make a crystal shortwave receiver. Schematics, picture diagrams, parts list and building instructions will be greatly apreciated.

Topic by Jezan    |  last reply

What is a piezoelectric crystal? Answered

I kind of know what it is, but i need a professional (Professer? Kiteman, my hero! LoL...) awnser. I know it is some form of crystal that when pressure is applied, positive (ions?) form at one side, and negative at the other. Also, how does a piezoelectrical ignitor work? What crystal does it use?

Question by PKTraceur    |  last reply

How to "vajazzle" the vulva with crystals?

Greetings, Looking for how-to on decorating the vulva with crystals a la Jennifer Love Hewitt and Completely Bare Spa. Thanks

Topic by NeuroPulse    |  last reply

add an external crystal to attiny85?

How can i add a 16mhz crystal to attiny85? i dont know how and cant find it online

Question by fossilshark    |  last reply

Crystal installation - does it matter?

I'm having some problems with a tranmiter i made. It hasnt been working as the sound is odd. i noticed when u touch the crystal the sound changes. so, Does it matter which way a crystal goes in? is there any + - sides?

Topic by Killa-X    |  last reply

Help about homegrown crystal

I want to grow a crystal which is something written inside it and when you put some light on it, text will reflect on wall. is it even possible? any idea about how to do it guys?(also ladies :D)

Topic by ashbazg    |  last reply

adding an external crystal to attiny85?

How can i add an external crystal to run at 16 mhz to my attiny85? can someone please tell me step by step what to do i have searched everywhere and cannot find the answer. thanks.

Question by fossilshark    |  last reply

Citrine crystals and hepatitis protein?

Has anyone else heard that  when a laser is passed through a citrine crystal onto bodily scars, it will remove scar tissue?  Also, any news on research using a protein found in hepatitis ( c, d, or g,?) to cure aids??  I heard both of these  on the radio. Thanks. kathleen

Question by kathleencleans    |  last reply

Beautiful Crystal Covered Apartment

Copper-sulfate crystals are lovely with their rich blue color. So lovely that artist Roger Hiorn completely covered the inside of an apartment in London with them. This was done by sealing it and pumping in 75,000 liters of supersaturated solution. After it had cooled and been drained off, the doors have been opened for visitors to come in two or three at a time. This can only be done since the apartment was set to be demolished. Stop by before it closes on Nov. 30 and gets destroyed. Link

Topic by fungus amungus    |  last reply

Credit card crystal radio

What do you think about the feasibility of a credit card sized crystal radio? (Fits inside a wallet) Some possible i though so far are... A simple pcb with a diode, and a capacitor and a coil wrapped(protected by duct tape) around it. The antenna has to be tied to a hole on a corner. Or it is coiled to the card, ready to be unwrapped. The ear piece can either be external... Or can be glued to the card itself, but you must put the card near you ear... Instead of a winded coil, maybe it can be part of the pcb design itself... and to tune it, you unhook a beady wire and place it in the holes placed in a interval. What do you think? Any more ideas? In fact. a competition can be made for this idea.

Topic by akimbo m    |  last reply

Crystal radio help anyone?

(If you want the blow-by-blow of my questions, skip the following gigantic piece of text and proceed to the 2nd list after the first)   I was reconsidering making a crystal radio the past week and so I set out to research the topic on the 2nd most popular information database on the internet which comes out of the 1st most popular one. According to wikipedia, all you need is one diode in order to split the AC signal coming in via the antenna in half, therefore it uses half-wave rectification (it's not quoted; it's what I understand from it). Could full-wave rectification be also used? Like connecting the antenna to a bridge rectifier (aka. diode bridge, aka. 4 diodes stuck together)? I know that half-wave rectification yields pulsed DC, but I also don't understand how. By that I mean what happens to the other half? Does the other half of the wave connect directly to the output? One last thing, I know the largest metallic object I can ever use as an antenna is basically just my roof, but then I don't like coming up to the roof and looking for some exposed metal to connect to. Any thoughts on what huge, metallic items I can use in my household? I've already thought up a list of what I could use for an antenna: -Window screens -Extremely long piece of wire (I have an 8 meter long CAT5 cable going from the 1st to the 2nd floor) -My front gate -Sheet metal laying outside my front door (not the gate) Here is the summary of all my questions: -Is this wikipedia article true? (see at the list "semiconductor" area) -Can full-wave rectification be used on such radios? -In the case of half-wave rectification, where does the other half of the signal go? -What can I use as an antenna (excluding my roof)? Aside from the asked questions: -Is there any other way to tune to a particular frequency? -I'm asking opinions to people who know what they're doing (no offense to beehard44, this is more of a poll that anything else).

Question by nutsandbolts_64    |  last reply

how to design a crystal oscillator for a particular frequency using quartz crystal

Can anyone please provide a link which speaks about this...for a beginner  thank you in advance

Question by sandiri    |  last reply

Is it possible to replace a 40Mhz crystal with a 49.860Mhz?

I bought a RC submarine that was running at 40Mhz. Submarine broke, seller shipped a replacement, but replacement could not be remotely controlled by original remote. In fact, while looking under the submarine, there was a sticker written "49Mhz - 3". I guess it is referring to Channel 3 - 49.860Mhz.  So could I buy a 49.860 crystal, remove the 40Mhz crystal from remote controller, and get my submarine to run again? Is there anything else to consider???

Question by donstereo    |  last reply

I am looking for any advise on how to apply crystals to all surfaces,especially soft sandals.

I have glued crystals to my sandals 4 times now and the crystals fall off when the glue cures. I have used gem -tac,amazing goop,527, and fabri-tac. I bought e6000 tonight hoping for a miracle. Any advice would be appreciated.

Question    |  last reply

Finding out the value on a rc crystal?

I have a rc kit and need to know what the reciver frequency is (so I can get a Transmitter). The crystal has nothing saying the frequency. The part number on the crystal is... 26 800 6BF-15 any help would be apprecated. Thanks. PS: While writing this My brother was playing with another Rc kit and it burst into flames.

Question by David97    |  last reply

how can i grow crystals?

I want to grow crystals, additionally i want to grow crystals in a particular shape ive seen it been done before however i can not figure it out. Does any one have any insight?  thank you 

Question by puregoldner    |  last reply

Green Tourmaline Crystal as a natural battery- Answered

-  I know that a Green Tourmaline Crystal, when heated, will produce a negative and positive charge  at respective ends of the crystal-so, if the heat source was a  super glass lens ( convex or concave, i am not sure which would work most intensely, with the sun going through  the lens and hitting the crystal-  ( for the ecologically minded)-or a laser- or microwave blast,  would we then have a natural battery?  It may have to be a  large crystal!

Question by kathleencleans    |  last reply

what is the application of germanium single crystal

Germanium single crystal, which is made from Ge metal, who can tell me the basic and newly developed application?

Topic by marvin jiang    |  last reply

Crystal walkie talkie range extender? Answered

Hey everybody, I'm modifying some old walkie talkies I have, and I want to extend the range but I'm not sure how to do it, though, because it uses one of those crystal transmitter components to output 49 Mhz. If someone knows how to extend range on radio crystals please let me know! Thanks in advance!!

Question by Adum24    |  last reply

3D Glasses setup? Crystal Eyes?

 I recently found a old pair of Crystal Eyes, and i recognized them as 3d stereo glasses, i found alot of wires, a manual, and an emitter box. I was wondering if their is an easy way to connect them to my computer I have a 8800GT and a Gateway 24inch monitor

Question by snowluck2345    |  last reply

crystal oscillator TCXO VCXO OCXO

Guangzhou zgc electronic co.ltdZGC Electroric co.,ltd. is an incustrial entity that is involved in developing and manufacturing quartz crystal resonator of various models and Electronic CO.,LtdZGC Electronic CO.,Ltd

Topic by zhenggong  

My iPod Crystal Radio Idea

I'm Sure someone has had this idea before but I just want to know if people think this would be cool. I was thinking about make a breadboard with a crystal radio transmitter with a head phone jack sticking out of it, that would fit in some sort of case, and have it stick into my iPod Nano 3rd Generation. My iPod is red so I would paint the case red to match, Please post idea and links to the parts please.

Topic by Nameless37    |  last reply

do you think we could produce energy with a crystal by using knowledge of atoms and compounds and reactions???

I remmember seeing something on T.V. about an ancient civilization using crystals to power thier technology which happened to be very advanced (maybe atlantis?). i was wondering if it would be possible by studying reactions of atoms and molecules withing crystals to find one that if large enough could power something such as a levitaion device (perhaps create a crystal using certain compounds and manipulating atoms and molecules.) perhaps study the reaction of humans and crystals (we conduct arua and other things) i dunno. i wanted to see what other minds would think of how crystals could conduct energy to power a certain technology. please don't worry about critisism and let your mind flow free.

Question by REAEPR    |  last reply

Blowing Quartz?

I know you can make pipes and other stuff out of glass by a technique called glassing blowing could you do the same with quartz?

Question by thegreenchristian87    |  last reply


Hi, I am a researcher and I am interested in the piezoelectric qualities of certain materials, specifically quartz or bone and wondered whether anyone had experience of passing sound through quartz/crystals/animal bones? Is it possible to use one of those material to carry sound? I know that glass windows can be used as large bone conducting speakers, just wondering if anyone has any experience of this? I haven't done any hands on experiments myself as I am still at the research stage. Any advice would be appreciated and a big help! Thanks

Question by Maudiema    |  last reply

Help Me to Make a Flower Using Crystal

Please Anybody can help me to Make a Flower using crystal. several crystal items were in shop. so pretty. then i though to make one. please share with me. thanks. Note. i am a new one to this forum!

Topic by mnms1983    |  last reply

Large Crystal Bowl Broken --- Any Ideas?

A large Romanian crystal bowl that has a lot of sentimental value for me was just accidentally broken. Any crafty ideas on how to reuse/repurpose/recycle this piece of my personal history?

Topic by cab47cpa    |  last reply

Ceramic resonator vs. Quartz crystal for arduino? Answered

Hey- I'm going to build some Arduino clones (as posted from ) and was wondering if it would be better to use a crystal or a ceramic resonator. i will be ordering from Tayda Electronics (Ive ordered before, 10 days shipping for rock bottom prices, I'm ok with that) and the resonators and crystals are +-5c. difference, so I was wondering if I could use resonators, since they are a bit cheaper and I'm ordering a few (around 8). Which ones would be better? Also, does anyone know for the circuit from the above link would work with a 4.5v supply if I just left out the 5v regulator? Many thanks- Astroboy907

Question by astroboy907    |  last reply

How to grow a crystals with gypsum and other materials?

Dear: Instructables Just to let you know I am limited to materials in my house. I want to grow a crystal with plaster like plaster of Paris but I am running into a few problems. I know that Gypsum or plaster of Paris is already a crystal but it doesn't have the necessary hardness I want. I want It to have a hardness of a minimum of 6 on the Mohs's scale. I also am limited to chemistry knowledge. I've been trying all day to design a crystal with the specifications I want but I've been having trouble trying to draw a Lewis dot diagram for plaster of Paris. I am not that good at drawing Lewis dot diagrams unfortunately. Here are some materials in my house I think I could use to incorporate with the homemade crystals. Acetone Potassium Chloride Sugar Baking Soda Potassium Nitrate and more... Can I have some help please? Thank you. From: Noah

Topic by nschreiber0813    |  last reply

Instant coffee at home?

So, my sister asked me the other day, can you evaporate water from black coffee, to get crystallized  coffee, i figured she meant something like instant coffee, but more like how can it be done at home?

Question by blckthng    |  last reply

How to chemically reproduce a product called crystal fx or DNA mutant crystals from just an MSDS? Answered

I have been trying to reproduce a chemical paint treatment made by Alsa Corp - Crystal FX.  All I have to go on is the MSDS.  A similar solution is produced by DNA Mutant Paints. Yes, I am trying to do this on the cheap, we are looking at spraying my entire Japanese mini truck in this solution come spring, so... why not make up the solution myself.  Ingredients from the MSDS - Water, Urea, Neocryl BT-175, Aqua Ammonia. Have been experimenting already with urea to some success and another product that is designed to reproduce crystal like ice patterns on your window glass for Christmas.  I found one can at a store that said that container had been sitting there for over 20 years, they don't even know where it came from.  No data solution on that.  Any thoughts, path forward ideas would be great, provided they don't exceed the price of just buying the solution pre-made - about $200.00 plus 150$ for shipping - I live in the middle of nowhere.... 4 hours south of Alaska.  The pictures are of the product applied, and the silly truck is my target, a 1991 right hand drive Mitsubishi Mini Truck

Question by iminthebathroom    |  last reply

how do you make a SPIRAL wind chime/decoration that will spin freely in the wind?

Hi I am trying to make various crystals spin in the wind. I have even gone to the extreme of buying ball bearing fishing swivels to make it happen...not so much. Any way I think I need some sort of a spiral to actually "catch" the wind to propel the heavy crystal around. Anybody make these if you are willing to share that would be great. I don't need to reinvent the wheel.  

Question by charisgr8    |  last reply

How much is granite worth?

So today I went down to some local woods with a hammer (Geode,granite,marble hunting) and I saw that 2 friends of mine had dug up a 20-30 pound rock. It was a heavy little bugger. So I swung the hammer at the rock for half an hour until I had about 30-50 small chunks of granite. The main reason I broke it was so that me and my friends could split it. One of my friends didn't want it. The other friend wasn't allowed to have it. All that was left was me. So I then realized that it was way too much to carry around. So I told another friends that didn't help do anything but polish the freaking thing with a brush *pauses and laughs* that I would give him all of it but 3 peices. I'm starting to regret saying that. So I wanna know... is granite worth anything/expensive?

Topic by Flumpkins    |  last reply

what is the difference of the crystal 4 leads and 2 leads?

I want to make a simple AM transmitter, which is use a crystal with 4 leads. and i don't have crystal with 4 leads, i only have crystal with 2 leads, can i use crystal with 2 leads ?

Question by Rendydevara    |  last reply

I have a question about my crystal radio. Answered

I just made a crystal radio and got it to work, but I can only get it to work during the day. Can any one tell me why it does that?

Question by techno guy    |  last reply

How would I grow a giant crystal formation?

I have a 3 foot height by 1.5 foot width rectangular container of which i intend to grow a crystal formation in.  Does any one know how? That wont be toxic and wont dissolve?

Question by puregoldner    |  last reply

How do i make a radio without the crystals?

Some people have told  me about using a penny to make a radio. The objective though is to make a radio without the crystals

Question by ajyounes10    |  last reply

what is the possibility of having liquid crystal shutter in a camera? Answered

I've seen many camera, they all have mechanical shutter, what is the possibility of having liquid crystal shutter in a camera,like in shutter glasses?

Question by Suraj Grewal    |  last reply

were can i buy crystal iodine in australia?

I have been looking for some crystal iodine suppliers in australia for quite some time now, but the only ones i can find sell it by the metric ton! there used to be a site called auschem or chemsupply . au that sold it but now i cant find it anymore, and when i search it, al they ever have is car washing stuff or products that you cant buy, i know for a fact there was a site that sold chemicals (othe rthan bargainmart) withoin australia, although with ridiculously high shipping, does anyine know where the site is now? or if theres another site that sells iodine crystals, or at leats potasium iodine cheaply?

Question by oldmanbeefjerky    |  last reply

How can I recover a "crystallized" cutting disk?

I was cutting an iron L rod, and the cutting disk began to produce red sparks, instead of these habitual bright orange. Simultaneously, its cutting effectiveness was down dramatically. I searched in the web, and learned that this phenomen is named crystallization,and it is due to overheating. Now, my disk is a new one, I want not throw it to the waste. Any idea how to get it back? THANKS IN ADVANCE!

Topic by rimar2000    |  last reply

Clock signal from Arduino crystal input pins? Answered

I'm interfacing an Arduino to a chip that needs a 1 MHz clock signal. Can I take one of the Arduino's clock input pins an input it into a 74169 (4 bit cascading counter) to generate a 1 MHz signal?  If not how do I create a 1 MHz 50% duty cycle signal?  Thanks in advance.

Question by maewert    |  last reply

So, EMF blocking Stickers, Pendants or Death-Crystals? Answered

Uh, how to start with this one... Local health store started carrying the latest line of emf blocking stickers and pendants. At first I thought good grief, if people are that gullible as to not look into the science behind they perhaps deserve to have there money parted from them. Several weeks later though, a symposium was booked in the local convention hall. I was surprised to learn how many people actually went to this, and were indeed parted with a fair chunk of change. If you look into to it there are numerous if not hundreds of these anti-emf scams abound on the internet all claiming only theirs works... That alone would send my spidey senses tingling. I really don't want to get in to the science behind why this is a scam, and would appreciate answers from people who know what they are talking about rather then those have been duped. Moving on... I am afraid the owner of the health store is going to get slammed on this one eventually. Normally I would say the owner of the store has a good head on her shoulders with an excellent BS sensor. Not so much, this time around. Guess my question would be how to inform her of why its a scam with out her eyes rolling into the back of her head. "Had a friend go the symposium for kicks, "she has a doctorate in bio-engineering, health science and is pursing her latest degree in occupation health sciences." To her shock and delight it was simple for her to see through the scam, but she had to admit his did provide a technical sounding argument, mixing truth with techno babble, that perhaps someone with an understanding of only layman’s terms could be persuaded by. Oh, what to do...

Question by iminthebathroom    |  last reply

Bismuth suppliers.

I need Bismuth metal to make my own Bismuth Crystals. I cannot locate it at all in Australia Ive looked at the obvious such as metal suppliers etc. even non-lead shot and fishing sinkers but can't find it. I realise that I can buy it online but it is a fairly heavy metal and with the added cost of mailing  to Melbourne Australia makes it very expensive. As I'm going to melt it do you know of any other tools or items made of Bismuth that I could use? Any words of wisdom would help. Thanks in anticipation..

Topic by craftyv    |  last reply