NIckel Acetate Creation from Nickel II Oxide for Nickel Plating

Chemistry question here.  I wanted to play around with some nickel plating, and I started to follow a popular recipe that I saw on YouTube.  It started with Nickel II Oxide, placed in a malt vinegar for a week to create a solution of Nickel Acetate that you could then use as a bath to plate things with Nickel.  I purchased 100 grams of 99% grade Nickel II Oxide, and let it sit in 2L of vinegar for a long time.  After 2 weeks there's no hint of the emerald green Nickel Acetate.  So I purchased some glacial Acetic Acid, and added it to a liter of distilled water to make a 50% weight solution of Acetic Acid to make a stronger solution, and still a week later nothing green.  Solution is in a clean glass vessel.  A local chemist at work said it would be slow, but man, this is taking forever.  What am I doing wrong, or what could I do different? I know Ni Acetate can be achieved with pure nickel and electricity in vinegar, but I really want to try to convert the nickel oxide. 

Topic by monteypython 5 years ago


nickel plating question

Hi. There is instruction on this address https://www.instructables.com/id/High-Quality-and-safe-Nickel-Plating/ how to make high quality and safe nickel plating,and i have some question about that. When he showed to add salt to the vinegar in order to make the vinegar  more conductive,isnt the salt become Na and Cl ions? Will the Na positive ion stick to the negative nickel plate?(while making the nickel solution-step 3)? Will the Na positive ions stick to the item that we are plating besides the nickel( in the plating process-step 5)? will it spoil the object that we are plating with nickel? I see in the supermarket vinegar which said"synthetic vinegar" 5% acetic acid,water.(for food).Is it ok? when he said(step 4)"You can further clean your object by reverse electroplating (ie "electrocleaning") it for a few seconds.  Hook your object up to a negative voltage, a WIRE to the positive voltage, and drop them both in a vinegar salt solution for 10-30 seconds.  This will remove any left over oxidation" What wire did he mean? and the last one:how pure is the nickel should be?because i notice that most of the nickel sheet are about 99%-99.7% purity.is it ok? can i use pure nickel strip(97% pure nickel)that is used for battery welding? Thanks in advance.  

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


why i get this when i try to plate with nickel solution? Answered

Hi guys, I try to plate with nickel solution and all i get is a nasty black-green (corosive) colour and all that bubbles in nickel solution and that foam. And the wand i use is stainless steel. The solution is brought from a uk plating company and i don't think have something bad. please see attacked images and please give me an answer. thank you.

Question by Madib84 5 years ago  |  last reply 5 years ago


How many Volts can a 1.2V Nickel-Cadmium battery take?

Hi! I (still) need some help with building a solar charger... I want to charge a Nickel-Cadmium battery (1.2V) with solar cells from a garden light. Unfortunately these cells give me 5V in full sun... Will the battery take the 5 Volts without damage? The amperage is fine, so no questions about that...

Question by Fypsigon 5 years ago  |  last reply 5 years ago


Nickel sponge+Soldering tip cleaner

Hello, I am a computer engineer and interested on making instructables ! Since i bought my soldering iron like 2 weeks ago i am on the making of one soldering station (with helping hands and such),I bought a sponge but i didn't noticed that wasn't copper (it writes nickel on it). Should be oki for my soldering iron (I mean to keep my tip clean)? Greetings from the sunny and bankrupted Greece ! Xristos.

Topic by Deithomen 7 years ago  |  last reply 7 years ago


High quality and safe nickel plating question? Answered

Hi. There is instruction on this address https://www.instructables.com/id/High-Quality-and-safe-Nickel-Plating/ how to make high quality and safe nickel plating,and i have some question about that. When he showed to add salt to the vinegar in order to make the vinegar  more conductive,isnt the salt become Na and Cl ions? Will the Na positive ion stick to the negative nickel plate?(while making the nickel solution-step 3)? Will the Na positive ions stick to the item that we are plating besides the nickel( in the plating process-step 5)? will it spoil the object that we are plating with nickel? I see in the supermarket vinegar which said"synthetic vinegar" 5% acetic acid,water.(for food).Is it ok? when he said(step 4)"You can further clean your object by reverse electroplating (ie "electrocleaning") it for a few seconds.  Hook your object up to a negative voltage, a WIRE to the positive voltage, and drop them both in a vinegar salt solution for 10-30 seconds.  This will remove any left over oxidation" What wire did he mean? and the last one:how pure is the nickel should be?because i notice that most of the nickel sheet are about 99%-99.7% purity.is it ok? can i use pure nickel strip(97% pure nickel)that is used for battery welding? Thanks in advance.

Question by xchcui 5 years ago  |  last reply 5 years ago


Why do pennies and nickels have smooth edges unlike all the other U.S. coins?

I was fiddling with a penny when I noticed this. How come pennies and nickels have smooth edges unlike all the other U.S. coins?

Question by Quest for Questions 8 years ago  |  last reply 8 years ago


Can I charge Nickel Metal Hydride batteries with an old NiCad charger?

I have a NiCad charger (circa 1994) in good condition and would like to use it, even if it would take 10 or 15 hours to charge my Nickel Metal Hydride batteries as I use a lot of them.

Question by 10 years ago  |  last reply 9 years ago


Good way for electroplating washers? Answered

Hello everybody...........Seem's i am in need of help from the brilliant mind's of this site again. My dad has been electroplating nut's & bolt's for the past 35 years & i decided to join for the time being(i have summer vacations going on) Recently some guy came to us for getting washer's electroplated,Issue being that the washer's won't get coated with nickel (with the Electroplating barrel).Some of them stick to each other(leading to one side of the Warsher's without nickel coating). These are so thin compared to the nut's and bolt's we are used to electroplate,That some of the washer's get bent. Need any suggestion,any alternative way to do them without much issues. Below are some pictures attached for referance Thanks in advance Regards ~HD~

Question by Bobblehead Einstein 5 years ago  |  last reply 5 years ago


How to test for nickel levels in soil, water and plant based food? Allergy sufferer needs serious help.?

I have an allergy to nickel. It causes severe blisters so I must avoid it at all costs. Unfortunately, nickel is present in soil and water at varying levels and is absorbed by all plant based foods. There is some literature out there that lists which foods are worse, but are vague at best, and simply avoiding all plant based foods is not a realistic option. I would like to know if there is a way to test soil and water for nickel and determine how much is present? Or is there a way to test plant based foods for the nickel levels they have absorbed? I have researched this extensively and can only find information about getting tested for metals within the body. Confirming this would not change my dilemma. I have to work diligently at avoiding any further exposure to nickel as I understand there is no way of removing this metal once it is ingested. I have seen many specialists and their help is not only expensive, but limited (due to a lack of research in this area).  Any help or advice would be greatly appreciated. If anyone needs reference material regarding nickel in soil, water and plant based food should Read This from Ohio State University.

Question by canucksgirl 7 years ago  |  last reply 1 year ago


Voltage for NiChrome?

Will 2.5 volts be enough to heat a small segment of NiChrome wire up to/over 100 C? If it helps, the power is coming from a 8.1 kJ 2.5v 2600 F super capacitor which can unload very quickly.

Question by LiquidLightning 8 years ago  |  last reply 5 months ago


can someone help me play "anthony" by nickel creek on the ukulele?

I've been playing ukulele since i was six, but i just can't figure out this song. please help!!!! :)

Question by 9 years ago


bird launcher?

I need to make a homemade bird launcher (since i cant afford 200 dollar profesh ones.) all it has to do is make anything from a coin to a bird decoy at least 5 feet in the air.... anyone know of a good ible or web site that shows how to make one?

Question by redsuit09 9 years ago  |  last reply 8 years ago


Does anyone know how to make a gumball machine that takes money?

I want to make a really cheap gumball machine that takes, say a nickel for small pieces of chewing gum, like the ones in a packet at walmart.  Either that, or does anyone know where to buy one?

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


Is there any way to permanently change the finish (color) on a shower-head? From Brass to Bronze? Or Chrome to Bronze?

I would like to get a Grohe Freehander (http://www.groheamerica.com/t/_3874.html ) shower system for my bathroom, but all the fixtures I have are aged copper or aged bronze.. The fixture comes in chrome, nickel or polished brass, the cheapest being the chrome or the nickel. Is is possible to alter the finish after I purchase it?

Question by 10 years ago  |  last reply 10 years ago


What's in your money collection?

I want to know what is in your money collection. Here is what in mine. I had just started getting serious about it though. Tell me what you think.Paper Money=- 5 Yuan from China- 5 Dollars from Cayman Islands- 5 Dollars from Canada- 2 Dollars from Canada- 1000 Dollar bill from 1922 from Germany. I got it for a dollar at a local coin store.- 1 1935 blue seal dollar billCoins=Pennies- A bunch of pennies from 1979 and earlier just because they're old. A 1979, a 1978, a 1977, a 1976, a 1975, a 1974, a 1973 with a 7 stamped into it, a 1972, a 1970, a 1969, a 1967, a 1975, 1964, a 1961, a 1960.- 10 Wheat pennies, 3 1943 steel pennies all in very good condition, a 1952, a 1941, a 1950, a 1919, a 1925, a 1910, and a 1929.- a few souviner pennies. A Hulk, a Trump Plaza, a Hershey Park, and a Jungle Cruise.- A 1952 wheat penny PROOF.- 3 indian head pennies. They are all in a suprisingly (wowful) condition. A 1903, an 1888, and a 1899.Nickels- 4 old nickels, a 1946 (So close to being a war nickel) a 1969, and a 1985 (I know, you find alot of those), and an uncirculated 1964.- A bunch of different nickels from a series: 5 of the nickels with the boat on the back (2004), 2 of the nickels with the Shaking hands and crossing axes on the back (2004), 5 Indian Head/Bison nickels (2005), 2 Indian Head/Ocean view nickels (2005), and 3 jefferson head nickels with the original back (2006). Dimes2 mercury dimes. 1 from 1923, in poor condition, and a 1941 in a fine or very fine condition.Quarters- 1 Bicentennial- 2 silver quarters, one from 1953, and one from 1941.Dollars- 11 Sacajewaea dollars.- 5 Susan B. Anthony- 1 Morgan Dollar- 2 Eisenhower dollars. One is 1972, and the other is a 1976 - 1 1961 Franklin dollar, in UNCIRCULATED condition!Bicentenial.Half Dollars- 3 original half dollars, a 1971, a 1972, and a 1973 Commemoratives- 1 2006 5th anniversery of 911 with gold, and parts of ground zero.Foreign- 25 cents from Bermuda- 3 25 cents from Cayman Islands- 1 5 cents from Cayman Islands- 2 1 dollars from Jamaica- 1 20 dollars from Jamaica- 1 1 Franc from France- 1 Unknown amount from an Unknown Country.- 1 50 Pfennigs from Germany.- 17 1 cents from Canada.- 1 1 cent from The Republic of Trinidad and Tobago.- 1 1 cent from BermudaPlease note I have not been to all of these countries.Other=- 1 Roooofus the Roller Roo token. (I don't know where I got it).- 1 1972 proof set with a penny, a nickel, a dime, a quarter, and a half dollar. - 1 Showboat Token. Worth 1 dollar- 1 carwash token9/6/06 Edit: As some of you might see, I had updated a few. There are lots more that either my dad gave me, or I bought from the coin store.

Topic by Flumpkins 10 years ago  |  last reply 9 years ago


Need to build a circuit board

I need to build a small circuit board, with a timer and a led light, small as a nickel, I will provide more details. any idea?

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


coin/penny battery

Can i make a ''coin/penny battery'' with ''Bronze and Aluminium'' alloyed coin????. well my country's currency coins have following Composition: 1: Bronze and Aluminium       1 rs 2: Brass and Aluminium         2 rs 3: Cupro-nickel                      3 rs can i use any of them to make coin/penny battery?????please tell me if any of them will work.....

Topic by usama1994 5 years ago  |  last reply 5 years ago


help identifying an unknown object? Answered

Its about 4" long, solid brass, appears to have been nickel or chrome plated at one time and has four screw holes in it. any help with identifying it is greatly appreciated.

Question by mr.mountaineer 6 years ago  |  last reply 8 months ago


can you take chrome fitting for a shower door and somehow make them look like brushed chrome or nickel? ??

I have new shower door with chrome edges and all other fixtures are brushed chrome.  help!!?

Question by nannyg4x 8 years ago  |  last reply 8 years ago


Do Nickel-Metal Hydride batteries make a quiet popping sound when recharging? Answered

          I am recharging my Ni-MH batteries today (Wii-motes eat them up fast!) and I was wondering if it is normal to hear a quiet popping noise coming from the batteries? it sounds like tiny bubbles popping--very similar to the sound carbonated drinks make after being poured out of the original container.         I believe this noise is a result of the reversing chemical reaction being created inside the battery. the batteries shown below are my exact brand and model.         Is anyone else experiencing this phenomenon? If so, do you think it is normal? Leave your thoughts, comments, and otherwise below!      =D

Question by jensenr30 8 years ago  |  last reply 8 years ago


What type of steel do i need to get to forge a damascus steel knife ? Answered

I know i need high carbon steel and a nickel alloy steel but what kind is the best to get??

Question by Don,t try this at home 8 years ago  |  last reply 9 months ago


whats the best way to recover a shot bullet cleanly? Answered

I just bought a 1954 mosin nagant rifle (7.62x54R) and was wondering how to recover a clean shot bullet ( not smashed still in its original shape) to make it into a nickels. is there a material that would good to shoot into that wont ruin the bullet?

Question by vince 09 9 years ago  |  last reply 7 years ago


electro cleaning before electroplating

Hi. I made the instructable of A_Steingrube"high quality and safe nickel plating" address:https://www.instructables.com/id/High-Quality-and-safe-Nickel-Plating/ and i want to be sure that i did the elctro-cleanning that is mention on step 4 correctly. I try to ask A_Steingrube through the comment place and the private message but i have not get any answer yet.so i try to ask here. I made the elctro cleaning while my object was connected to the positive voltage and the wire connected to the negative voltage.I did that ,because i understand that the object sould be dissolved abit and this should be happens on the anode(connected to the positive voltage) but in step 4 he mention to connect the object to the negative voltage in order to make the electrocleanning.SO,is there something that i miss here? Thanks in advance.

Topic by xchcui 4 years ago  |  last reply 4 years ago


DIY Rechargeable Cell Chemistry?

Hi i was wondering if there was any electrically reversible battery chemistries that can be made from around the house materials like copper wire, iron nails, galvanized nails, graphite rods, aluminum foil, and other items like those.

Question by LiquidLightning 8 years ago  |  last reply 6 years ago


Idea for a forge?

I was watching deconstructed and watched the episode on transformers and toasters and i was thinking...can i use a toaster to heat a peice of metal to red hot? The episode says voltage is passed through a high resistance nickel/chome alloy that produes high heat (over 1000 degrees farenheit). Is there a way to hack a toaster to heat a peice of steel or such to a high heat using a toaster?

Question by trf 10 years ago  |  last reply 10 years ago


Collectibles

I have a very good coin collections my father left me.  I'm not really into coins, and would like to unload them to someone who has a good knowledge about coins.  He collected these coins while how was in WWIi.  Here is a description of what I have:   I have around 20 silver dimes that are so old, the dates have rubbed off. There is one dime dated 1907.  I have one Morgan dollar-date 1917.  I have several buffalo nickels.  I have the following silver quarters: 1952' 1954, 1947, 1942, (2) 1943, 1956, 1941, 1946, 1944, 1942, 1954, 1963, 1961, 1957, 1950, 1944, 1960, 1924, 1907, 1951, 1964, 1936, 1955.  I have several silver dimes, nickels, and quarters where the date has been rubbed off.  I have not "clean" the coins or "polished."  I would just like a "ballpark" amount of the coins I have....

Topic by wareaglesusanbf 6 years ago  |  last reply 4 years ago


Jammed locking type RCA Audio Interconnect

Hi  I have these Straightwire Rhapsody S RCA interconnects . They have a threaded sleeve over the RCA plugs. Mine are totally jammed !!! and any attempt to turn them is loosening the RCA plug on the AMP itself !!! the RCA plug is supposedly Gold - meaning gold plated copper mostly the sleeve is nickel looking  I tried pliers ! no avail ! Help!!! thanks  NEO

Topic by neo.aureus 7 years ago  |  last reply 7 years ago


The end of the energy crisis?

http://en.wikipedia.org/wiki/Energy_Catalyzer This is the wikipedia page to a cold fusion (low temperature fusion) device that uses powdered nickel as fuel to produce free energy... It's supposed to be totally eco-friendly and it's planned to be sold out as commercial cold fusion device. Just thought to share this with others on Instructables. I like it and am looking forward to seeing this in my hands when it's made commercial. How about you?

Topic by ZokiS 7 years ago  |  last reply 6 years ago


Update! Nominating Instructables to be Featured Group

Hello again. A little background on the NIF (Nominating Instructables to be Featured) Group, it is a group where people can nominate their favorite instructables to be featured in the group profile page. Click here to visit the group. New members are always welcome. This time there is a lot of exciting news to report: Newly joined members!! Thank you for participating. I can't wait to see your nominations! Locket Rocket The Ideanator Goodhart Hiyadudez Also there are newly nominated instructables. Drumroll please! Living Tealight holder made from hard drive parts by ChrysN Personalized Cards by gergi11 Technology Making a brass pocket flask by Vidar_76 (nominated by The_Ideanator) How to Make Your Own Screen Protector (for less than a nickel!) by jen7714 Put images inside QR codes by killerjackalope Workshop Sugru Soft-Jaw Pliers by mattthegamer463 (nominated by The_Ideanator) Some more news: Instructables such as Cinnamon and Sugar Apples by miso_soup, DIY Calligraphy by mhudnall, and How to Make Your Own Screen Protector (for less than a nickel!) by jen7714 got featured by a feature team member. That means that they were actually featured on the homepage. Congratulations! (A note: I forgot to add this to the groups forum topic post. Is there any way I can add it now?)

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


Why can't I get my voltaic pile (penny battery) to work? Answered

I've been attempting to make a battery using the various instructables (https://www.instructables.com/id/Penny-and-Nickel-Battery/), but I can't get anything to register on the multimeter. I purchased sheet aluminum from the hardware store, and that doesn't work. I even purchased CuSO4, to see if that would help, but it still doesn't work! I follow the directions exactly, is there something else that I've been missing?

Question by wordsworth 10 years ago  |  last reply 9 years ago


Forum topics that go nowhere

Has anyone noticed some forum topics look like by Grampa Simpson rambling?  They are usually by new members, and I often flag them as spam,  they often look like this....... But less funny We can't bust heads like we used to, but we have our ways. One trick is to tell 'em stories that don't go anywhere - like the time I caught the ferry over to Shelbyville. I needed a new heel for my shoe, so, I decided to go to Morganville, which is what they called Shelbyville in those days. So I tied an onion to my belt, which was the style at the time. Now, to take the ferry cost a nickel, and in those days, nickels had pictures of bumblebees on 'em. "Give me five bees for a quarter," you'd say. Now where were we? Oh yeah: the important thing was I had an onion on my belt, which was the style at the time. They didn't have white onions because of the war. The only thing you could get was those big yellow ones. Three wars back we called Sauerkraut "liberty cabbage" and we called liberty cabbage "super slaw" and back then a suitcase was known as a "Swedish lunchbox." Of course, nobody knew that but me. Anyway, long story short... is a phrase whose origins are complicated and rambling.

Topic by liquidhandwash 4 years ago  |  last reply 4 years ago


Can you make a super small waterproof prototype mp3 player?

I am looking for someone to build a prototype mp3 player that would have the following specifications.  - circular housing and no larger than a U.S. nickel in diameter. - top of the housing would have an insertion for a 1/8 headphone jack. - the height could about 1/4 inch to a 1/2 if need be.  (the smaller the better) - the housing must be waterproof. - the player will autoplay one song when headphone is inserted. Please feel free to contact me here: jacobaa7@gmail.com Thanks, Jimmy

Topic by jacobaa 7 years ago  |  last reply 7 years ago


Plating Silver/gold (or any other hypoallergenic metals) on a Brass ring. (Without access to specialized chemicals)

Greetings fellow makers and crafters. First off I want to thank all who take the time reading this question. So, lets get started. A while ago I decided to test my crafting skills and made a beautiful brass ring out of some very old 20mm brass ammo casing. A nice repurpose in my opinion. The brass however oxidizes very quickly and stains my finger green. And it seems like the skin underneath is developing an allergic reaction. Either to the oxide stains, the zinc, or maybe some nickel contamination in the metal? It appears dry and reddish sometimes. Because I put a lot of effort into making the ring and don't want to discard it I finally decided to electroplate it. Plating it with copper would be quite easy as it seems that copper nitrate can be made with citric acid. It would however still oxidize and leave stains. My second thought was Nickel, but I discarded the idea because I seem to be allergic to other Nickel plated Jewelry. Now comes the hard part. I live in Bosnia and Herzegovina. A country where I can hardly come across any chemical supplies. Even simple things like activated charcoal or hydrogen peroxide are nowhere to find. I could silver plate the ring if I had access to nitric acid. But as you see that would require me to buy it from some online store which I really try to avoid. I could start making my own nitric acid with the use of the Birkeland Eyde process. But I'd rather have something more safe, health friendly and without the chance of getting roasted by a 10-20kV transformer. Anyway, back to the topic. I am currently out of ideas on how to approach this project. So I am asking you guys if you know of any of the shelf products which have the required chemical ingredients that I could utilize to make this project a success? Thanks again. ------ And Happy New Year! :)

Question by icemaciop 3 years ago  |  last reply 3 years ago


can I charge an ipod touch 2nd generation with 4.8 volts of electricity?

I just got an ipod touch, and I noticed the battery gets drained very quickly when I am using wifi, so i figured maybe if I put 4 nickel-metal hydride (rechargable 1.2 volts each) batteries in series in a container, and added a female usb plug, it would be enough to power the ipod touch. Anyone think that would be enough to work?

Question by carrierpilot1357 9 years ago  |  last reply 9 years ago


Anyone savvy with Air Electrodes??? Thanks! =)

I'm posting this after having googled, of course...I work with DIY fuel cells using off the wall fuels. By far, the most expensive component of my FCs is the Air Electrode which I purchase from Electric Fuel Ltd. in Israel. The material was invented in 2008 (as far as I know) and EF were the ones who bought the patent (according to the inventor himself...sorry but his name eludes me). Anyhow, I was wondering if anyone knows how to make good air electrodes. Something that would give me at least a vold in reference to the SHE (V=0) and a current density of up to a few hundred mA/aq cm...The stuff is basically this, from the electrolyte side to the air side: Separator paper, Carbon powder with Manganese or Cobalt catalyst mixed in (and a binder of some sort, I suppose), a Nickel mesh (current collector) and a bit more Carbon+catalyst then a microporous Teflon(r) sheet (permeable to gases but not to liquids). I cant find nickel mesh where I live but the other stuff I could get--the Teflon(r) being replaceable with oil paper??? Any help would be greatly appreciated. N.B: I am Not trying to infringe on a patent, just trying to make some "homebrew" air electrodes for R&D; since I am still (steam comes out of ears) self-funded and low on funding...lol. Thanks a lot!!! =)

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


Is it possible to feel a zap from a watch battery and LED?

Here's the setup: one LED with its leads tied by conductive threads to magnets which stick to a watch battery, in contact with skin for multiple hours.  I had somebody say that this somehow was zapping them (enough to leave a rash).  Is this possible?  I've handled lit LEDs with watch batteries a lot (even underwater) and never felt a thing!  No spark, no zap, no shock, nothing.  So have I just been lucky?  Can this setup actually zap you enough to feel it, or even irritate your skin?  Or was the zapping perhaps an allergic reaction to the nickel magnets which was mistaken for being sparked?

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


Computer PSU wire question? Answered

Hi all, I want to turn an old computer PSU into a lab bench PSU.  After cutting all the connectors at the end of the cables, I've noticed that some of the common (black) wires were made of copper, while some of them were made of nickel \ aluminum (Silverish). The same is true for the +5V (red) cables. It's not the first PSU I noticed that had the different materials, and I was wondering: 1) Why are there two different kinds of wire? 2) Is it OK to ignore the wire material and just splice all the blacks together, and all the reds together? Thanks!

Question by Morgantao 5 years ago  |  last reply 5 years ago


Is anyone here interested in making a super small waterproof prototype mp3 player?

I apologize if this isn't the place to post these sort of requests, but I haven't been able to find a community like this to help me with a project.   I am looking for someone to build a prototype mp3 player that would have the following specifications.   - circular housing and no larger than a nickel in diameter. - top of the housing would have an insertion for a 1/8 headphone jack. - the height could about 1/4 inch to a 1/2 if need be.  (the smaller the better) - the housing must be waterproof. - the player will autoplay one song when headphone is inserted. Jimmy

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


Nordic Gold Answered

I'm planning on making a ring out of a coin. I'll use Euro coins. 1, 2 e 5 Eurocent coins are made of copper covered steel and are too small, so I think they won't be a good choice. 1 and 2 Euro coins are the right size, but it seems that they are made of alloys containing nickel, that may cause allergy. So I think I'll use a 50 Eurocent coin, that is made of Nordic Gold, an alloy (89% copper, 5% aluminium, 5% zinc, and 1% tin). Has anyone ever made a ring out of Nordic Gold? Did it cause allergy or stain your finger?   Did it tarnish? Is it malleable? Thanks

Question by Fabio M 6 years ago  |  last reply 3 years ago


Need help thinking of something conductive and magnetic? Answered

I am trying to attach some led lights under a shelf and also need to make them removeable, i need to find something that is conductive as well as magnetic. My original idea was to just get some small nickel or ? plated screws and just wrap wire around them and screw them in but not completely sure of that idea working. I already made the lights and have small neodymium magnets that im going to attach to them but just need some ideas of what to use for under the shelf....thanks Ive thought of clay, or glue and other stuff but idk. im putting 4 lights up. and there will be a switch to shut off power to the material when not in use so there's no safety issues.

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


I rebuilt a battery and it didn't work. why? Answered

Today i got the 12 batteries required to rebuild the battery in my powerbook 190. i dont know the condidtion of the parts inside the laptop, but it must still be in a somewhat working order because when i hooked it up to an ac adapter (12v, 15a) before, its power light turned on and it made some noises. it didn't fully turn on though, because it needed 24v, not 12. hoping that rebuilding the battery pack would help, i bought 4 cordless phone batteries, each consisting of 3 smaller batteries and equaling 3.6v. all together that created the 14.4v that is needed to replace the original, acid leaked batteries. i wired them in series to get the 14.4v. I think that it may have not worked because the original batteries were nimh (nickel metal-hydride), and these new ones were nicd (nickel cadmium). Upon observing the internals of the laptop earlier, before i bought the batteries, i noticed some peculiar things: -there were a few spots where some components were added, (eg- resistors, capacitors, jumper wires, all were smt) -a unbranded piece in the battery power area, labeled on the board as XFER1. it is black and has five connections on each side of the component, which seem  to have copper wires attached to them leading inside the component. -no marked fuses on the board. the (apple released) manual for disassembling the machine states "you can blow a (soldered) fuse on the board", but there are no spots where a fx (x representing a number, eg: f1) is present, and most of the smt components in the suspected area are not marked and lok much like the same piece. can anyone help me figure out what may be wrong? the ac adapter port works but the battery doesn't, would uploading pictures help people help me?

Question by zack247 8 years ago  |  last reply 8 years ago


How to vary output of DC power supply?

I have a DC Power Supply, Model 20R, 120 input, 13.5 DC output, 20 amp.  Is there a way to change the output Amps?  I want to use this power supply for nickel plating. I need the amps to be variable or fixed at more than the onr setting of 20 amps.  (example 2, 4, 6, 8, 10 amps ) This is a nice heavy duty PS made in USA.  A new DC PS is over $400 and they are cheaply made imports. I used to repair electronics for NASA years ago.  I most likely would have known how to do this back then, but the older I get the more I can't recall. (Old age is not fun!!) My point is, I have the experience to do what you tell me to do. Thanks

Question by Old_Chipper 6 years ago  |  last reply 6 years ago


lets trade kits

I will trade for your random parts i mostly very big LED's or LED displays or any electronics you dont need that are in OK or acceptable condition for upcoming school science fair (don't live near radio shack) i will trade my electronics kit to you it includes.2-POSITION ROTARY SWITCH condition=mint about the size=of the tip of your thumb to the middle joint.3 pin stereo jack 2 peices condition=mintsize= of a nickel.mono and disk capacitor condition=OK (sightly scratched leads)1 film capacitor condition=mint1 resistor 260 Ohms condition=good1 toroid with copper wire 1 without condition=mintsize= 2cm in circumferencesize=a dimeIR RECEIVER FOR REMOTE CONTROL condition=okand 5 other unknown peices (sensors and capacitors)

Topic by albylovesscience 9 years ago  |  last reply 8 years ago


Selective Surfaces -What are the different selective coatings available for Solar thermal application?

It is well known that coating the absorbers with a selective surface helps in increasing the efficiency. I am building a air heater using parabolic trough and an evacuated tube. I've chosen Aluminium as the tube material...but I'm not able to figure out how to selectively coat the surface and which coat (paint or process) to be used for Aluminium. i mean all I could get through the web is some kind of electroplating under controlled environment. Isnt there any kind of pain available which can give good performance at 200 degree celsius? I read somewhere that heating the stainless steel to a temperature at which nickel oxidises, results in a surface which has absorptivity of 0.93 and emissivity as low as 0.08? Can anyone help with this?

Question by vvk557 9 years ago  |  last reply 9 years ago


Noob Q about inverter for an ornithopter

I was looking in the back of my Jameco catalog the other day and they listed a product called "Muscle wire". It's apparently a nickel-titanium alloy that shrinks as it heats up. It occurred to me that I could flap ornithopter wings with it (a really small ornithopter). I was trying to figure out how I could switch voltage from one pair of wires (the flap UP wires) to the other pair of wires (the flap DOWN wires) without a microchip. I came up with something I'm sure wouldn't work involving a couple transistors, a diode and a cap. Today on wikipedia I figured out that what I was doing was something close to an inverter.So here's the question: Anyone know of a simple switching circuit that runs on a/c power and does not have square-wave switching characteristics?I'll keep researching this myself, but sometimes 'tis quicker to ask the big-brained and kind hearted (you know who you are).

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


Green isn't all that green after all

While the color green has been the hue of choice for environmentalists and companies wishing to show that they care about nature, making a product green is actually toxic. Due to the difficulty of making a green dye and all the chemicals that are used, it contaminates anything it touches. So when a product is simply putting some green to make it look a little more nature-friendly, it's actually making things worse. Yay! From the NY Times: Take Pigment Green 7, the commonest shade of green used in plastics and paper. It is an organic pigment but contains chlorine, some forms of which can cause cancer and birth defects. Another popular shade, Pigment Green 36, includes potentially hazardous bromide atoms as well as chlorine; while inorganic Pigment Green 50 is a noxious cocktail of cobalt, titanium, nickel and zinc oxide. The Toxic Side of Being, Literally, Green

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


DIY Furniture: I have two rectangles of fiberglass with holes drilled in the corners. I want to make a coffee table.

I want to create a two layer coffee table. I've got the idea in my head, but haven't found the right materials. The fiberglass layers both have 4 holes (approximately 3/8" diameter - I can be more exact if necessary) drilled in each corners. The two layers would be separated by 4 metal tubes/pipes (~ 18"?) made of stainless steel or brushed nickel or the like. The top layer is held onto the 4 tubes by some sort of screw with a flat head that's bigger than the hole diameter. The bottom layer is held on by some sort of furniture "feet" that screw into the tube from the opposite side. Any ideas on what I can use for the top screw, the tube, and the foot? One such assembly for each corner, of course. The more exact the answer the better. Thank you, Chris

Question by caj9064 4 years ago  |  last reply 4 years ago


Coin Collectors

Hey guys, I was just wondering if anyone here collected coins. My brother, and my dad, and I all collect coins as a side hobby. What coins do you collect? What types do you have, and the oldest ones? I have many books for nickels, dimes, and pennies. I just love the feeling when I can open up the book and find it full! My brother and I just bought some old Indian Head pennies, as well as some Steel Pennies from 1943. (During WWII) I have many foregin coins, as well as about 20 Susan B. Anthony's. I have about 10 Sacajawea coins, and a few Kennedy Half-Dollars. I just love the feeling of the profit that will be made in the future. Today I collected about 6 brand new 2007 Pennies, and took them out of circulation. Share your tips, tricks, and cool places to find your coins! As well as your coin collections!

Topic by Brennn10 11 years ago  |  last reply 4 years ago


Help me identify this spider?

OK so, tonight I was getting out of the shower when I saw what looked like a little bit of red string dangling in the air. I inspected closer and found out it was some kind of spider! It kinda just dangled there on what seemed like one thread of web from the ceiling about 1-2 feet from the floor. After blowing on it to conjure some sort of reaction, nothing happened. It just slowly swung without moving. So seeing as it was dead, I grabbed the stand of web a small distance ahead of it and dropped it into the sink. As soon as it touched the sink, it sprang to life being the sissy I am I filled the sink with water and let it be sucked into its watery grave. Here's my description, I'll post pics tomorrow. It was a deep red color, I'd say almost burgundy. I found it in my bathroom in Phoenix, Arizona As for it's size, I'd say it was relatively small, maybe the size of a nickel at the largest. Remembering back from learning about insects in fourth grade, because it was a reddish color I deducted it could be venomous, but I doubt it.

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