For sale is some Fox Crystals (55.8MHZ) and a crystal assortment. Thanks for looking.
Topic by tinstructable
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
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
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
Greetings, Looking for how-to on decorating the vulva with crystals a la Jennifer Love Hewitt and Completely Bare Spa. http://www.stylelist.com/2010/01/13/jennifer-love-hewitt-swarovski-crystal-vajazzle/ http://www.completelybare.com/brazilian-bikini-wax.php?osCsid=6d24517ce06a68dacd7b3876dcac3d56 Thanks
Topic by NeuroPulse | last reply
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 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.
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
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
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
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
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
(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
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
Can anyone please provide a link which speaks about this...for a beginner thank you in advance
Question by sandiri | last reply
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
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
- 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
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
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
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
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 specifications.tel:86-20-32068136fax:86-20-32068201ZGC Electronic CO.,LtdZGC Electronic CO.,Ltd
Topic by zhenggong
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
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 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
I have made a circuit of radio control switch with PIC16F and diplayed the value on LCD16X2, i am having the problem with its crystal frequency. When i set pic18F with its internal crystal of 4Mhz its working fine,but not with 16F using 4MHz external crystal and 33pF capacitor so how should i solve the problem of external crystal and its capacitance for pic16F.
Question by Alia Bakhsh | last reply
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
A normal oscillator will provide 360degree phase shift. of this 180degree is by the transistor amplifier and the remaining 180 is by the feedback circuit or tank circuit. but in the case of a pierce crystal oscillator ,it is the crystal which connected across the collector(output) and base provides 180degree phase shift the crystal provide 180degree phase ?
Question by mishal.abe
Would the time functions (delay, delayMicroseconds, millis, micros) wait the same amount of time (or increment as fast as for millis and micros), or would their time or speed be affected?
Question by VirtualBoxer | last reply
Hey- I'm going to build some Arduino clones (as posted from http://fritzing.org/projects/barebones-arduino/ ) 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
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
Hi All,I just finished drawing out the tutorial for this beaded red crystalstar pendant - sort of using the beaded bead beading technique.See the free tutorial at:Pendant Tutorialthe finished photo of my pendant:PhotoThanks for looking!
Topic by beadangel | last reply