nickel plating question

Hi. There is instruction on this address 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% it ok? can i use pure nickel strip(97% pure nickel)that is used for battery welding? Thanks in advance.  

Posted by xchcui 4 years ago

electro cleaning before electroplating

Hi. I made the instructable of A_Steingrube"high quality and safe nickel plating" address: 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 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.

Posted by xchcui 4 years ago

electro plating pewter - brass

Hi, can any please tell me a simple way of plating pewter - brass   thankyou

Posted by BLOCKER999 5 years ago

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. 

Posted by monteypython 4 years ago

Copperplating with non-pure-copper?

Hi! I plan on some experiments with a modified method i saw here for PCB-plating with copper to make the holes conductive. Now the question: What if my metal is not 100% pure but has some impurities in it? Does it still only "transfer" the copper and leaves the impurities as slag behind? I think it should be this way, since a similar approach gets used in refining metals to a very high purity; but i am unsure... Lets say i do: Follow the basic recipe (with smaller ammounts!) @ and use copper sulfide. I think the trick now is that only copper-ions get disolved in the copper sulfide and nothing else. Those ions become plated to the other pole and thus i get purest copper plated to it?

Posted by Orngrimm 5 years ago

Desktop Plating Machine

For a Desktop plating machine, what type of container would you use, how would you pin it out and how much voltage would you need? thanks in advance, also, i know that there was another instructable written by my former self , but I know that I did not build it right.

Posted by Steamdnt 9 years ago

Beginner Jewellery maker. Question about gold/silver plating

Hi there, I'm starting jewellery making as a complete beginner and want to use Metal Clays to do this as it seems one of the easier and cheaper ways to make jewellery at home. I looked into lost wax casting, but there are no studios or workshops near where I live to do this. I really love gold jewellery, and was wondering that if I used bronze, copper, or silver clay, am I able to plate it too? I've seen those electroplating kits online, but I was wondering if it would work after I've finished making my jewellery piece with the clay.  I've also seen videos about 'silver accenting' copper clay... Is this just basically like coloured base metal (costume jewellery), or is it real sterling silver (i.e high end costume jewellery). Any insight anyone can provide is very much appreciated! :) Erika

Posted by cindyycindz 2 years ago

face plate

I would like some sinmatics of a steam punk face plate , u know for your face, kinda like a monicle

Posted by knuckel 8 years ago

ball - on - plate PID controller

Hello everyone I work on a project ball on a plate and have a problem making the ball move a circular motion Please Help Thanks 

Posted by aljaur 10 months ago

Making a plate which detects contact with metal

Hello, I'm trying to make a 6" x 6" plate which can detect when a needle comes into contact with it.  The plate can be made out of whatever ( preferably an easy to obtain material like a metal sheet) and have any electrical components necessary attached to it but the needle can't have any attached wires etc.  Any thoughts?

Posted by kmforest 1 year ago

What to do with old license plate

Hey guys I ~~ripped a license plate off some dude's car~~ got a new pair of license plates for my car. As such, I have a surplus pair of plates. I'll most likely keep one of them unaltered for sentimental reasons, but was thinking it could be cool to do something with the other one. Anybody got any good ideas? --Purduecer

Posted by purduecer 9 years ago

motorized flip up license plate

    I have started to try and create a motorized flip up license plate. It's mainly for my motorcycle.  In the "off" position the license plate is down and readable. Turn the switch to "on" and it flips up, making the plate unreadable. I thought about using a servo or a motor with limit switches. I do not really know how to wire something up to control the servo or motor.  Any help would be great. I know they sell these as kits, but they start off at teh $150 dollar range. Thanks in advance!

Posted by thirdGEARchirp 6 years ago

Automated License Plate Recognition - Good ? Bad ? Indifferent?

Is this a good thing? Does anyone see any possible bad in it (drawbacks, ways to abuse the system)? One place the videos can be found

Posted by Goodhart 9 years ago

Thermoelectric plates not working?

Hi, I am doing a school project and i need to power 8 LEDs with 10 thermoelectric plates, so i soldered 2 on one led and put them over a candle, the LED didn't light up and i don't know why. Is the voltage too low? If so will i be able to power 8 LEDs with ten of these in parallel?  Thanks for any help in advance!

Posted by CrazyPharaoh. 1 year ago

Gelli plate substitute

Hi. there is a new craze sweeping the craft and art community with a mono printing plate called a gelli plate. It's made out of some sort of mineral oil or gel of some sort. (i think). It's a flexible, clear mat with a soft feel and a give to it, a bit like jello. There are plenty of homemade versions using gelatin. which works fine for a while but it soon breaks up or bacteria sets in as gelatin is a food substance. Are there any clever boffin types out there that can make a similiar product that doesn't use gelatin and that has a good shelf life. I first thought of Oogoo but it's not pliable enough. This Gelli plate reminds me of the soft silcone gel that is used for scar healing, but is so expensive for small sheets. here is the link to see what I am after.

Posted by Lijesm 5 years ago

Storing periphery and cables under the table w/ a perforated plate

Hi there! Many years ago, I found an instruction for storing PC peripheries and cables under the desk using a perforated plate and cable ties. But unfortunately, I'm not able to find it again. Does anybody has a clue of what I'm talking about and can give me a hint oder even a link? :) Regards. Felix

Posted by f.zweig 8 years ago

attaching grind plates on aggressive skates

I havent ridden my aggressive skates for a while so i cant remember which side to attach my grind plates, (for some reason i took them off when i stopped usin them.) can someone help.

Posted by XI3 10 years ago

Traffic light plates and other waste glass reuse

What does a municipality do with old traffic lights? Why, they can make them into dinner plates! Recycled Glassworks makes plates from old traffic light covers from retired lights, often the ones replaced with the newfangled LED kind. Oddly, the green lights end up as blue plates... dunno if this is an artifact of the plate-making process or if the light behind is very yellow, necessitating a blue "green" light.But while that's probably their most dramatic product, there's another. Most glass recycling is limited to bottles and jars. The only thing to do with broken windows, or broken glass tabletops, or other glass of this kind, has been to throw it away. Recycled Glassworks accepts this kind of glass in addition to the traffic light kind. They cut it to size and kiln-bake it in a mold (a process called slumping) to produce extremely attractive bowls and plates.Way to go, Recycled Glassworks!

Posted by rachel 10 years ago

Small VERY Hot Plate

I am looking for someone who can design for me to make or make for me a specialized hot plate. I need it to be small like 3" by 2" and to get very hot as much as 700 degrees is desired. I want the power source to be 400watts. I know this seems hard but my reasoning is that the smaller size means higher temps with less wattage. I would use this as a hot plate that evaporates liquid from an airstream as it passes by - a dryer if you like. I would use 2 to cause the air to have to pass both in a zig-zag path. I would like to have a solid surface so eventually I see the plate encased in ceramic but for this it need only be metal. Can you help? Contact me here on the site to discuss more details Coog

Posted by coogrrr 5 years ago

Is it possible to transfer data via magnetic induction between two coils separated by a steel plate ?

Is it possible to transfer data via magnetic induction between two coils separated by a thin steel plate of 2mm ? Or does the magnetic field gets diminished by the metal plate?

Posted by ZZamorin 2 years ago

Extrusion plate in CAD

I have an idea that requires either machining abilities/tool access or CAD experience. A while ago, I found out something that was apparently common knowledge. Meat grinders with their blades removed can be used to extrude spaghetti. So I decided to look for additional pasta extruder plates for different noodles. There are no pasta extruder plates for standard meat grinders. You can, however, buy a glorified grinder and accessory plates or a dedicated pasta machine for top dollar. The marketted pasta makers at their very cores are the same as the meat grinders with the right plates installed. Obviously pasta dies/plates for meat grinders are intentionally not produced. The closest I could come was a garage sale extruder that looks like a plastic grinder with three dies. Big surprise, it doesnt work. But I modified a plate so it sort of works for a grinder. This worked as proof of concept. Would anyone be interested in helping to design CAD files to print pasta dies on Shapeways based on proper pasta dies? I don't know much about CAD, but it looks easier than the designs created by some folks on here. Basically disks with a dimple for alignment and specially shaped holes. admittedly, the hole depths would be the complicated part. Let me know what you think.

Posted by Darkman 2 years ago

Powering Peltier Plates

Hey guys,So, I just got a Peltier plate, a device that gets very hot on one side while very cold on the other. It requires 90 watts of power. I was just curious what would happen if you powered it by USB or 9v battery. I found this tutorial which uses USB, however, I doubt it gets to its maximum coolness potential. Also, if I used a 9v, would that drain the battery in a matter of minutes, or even damage the plate?Thank you.

Posted by Joe426 10 years ago

Project Idea

A roomba is roughly the size of a plate. I would like to make a roomba plate washer - one that sits on your dish, soaps, spins, scrubs, and rinses, a-la desktop dishwasher. Are there any kits left?

Posted by stasterisk 11 years ago

License plate spray to emulate (PhotoBlocker) existing products

I want to learn how to make my own photoblocker spray so I can use the tollway without my plates being photographed. I know PhotoBlocker already works but wondering if you geniuses can come up with an at home, DIY for this purpose. MANY thanks!

Posted by kfarrell 9 years ago

Flashing L.E.D plates to get kids to eat their food.

I was sat in a caf'e earlier , and there was this todler sat on the table next to me. Her parents were trying everything to get her interested in the food but she was having none of it. So I had this idea for an instructable, a plate which you serve meals to your todlers,that you turn on and it flashes multi-colour lights.Possibly even through shapes of their favourite sessamee street charachters. It would need to be washable and could possibly play a tune like a jewlery box. Although it may be better to make a base mat with the leds and sound box and use the weight of  a see through plate to operate it. That way you could just wam the plate straight in the wash and not have to worry about electronics getting damaged.

Posted by ghostfart 8 years ago

usb face plate

Does any one have a line on a usb face plate for the front of a computer? im looking for some thing that would replace one of the removeable slot covers on any computer. i have a car stereo that has usb hook up for flash drives but it looks ghetto with a usb cable hanging out from the dash. i only need 1 usb slot so i guess i could just cut a multi port on up....if i could find one. i checked rs, tigedirect, bestbu, circuit city, and a few build your own comp shops and cant find the usb plate i need. i have a cable with the female end on it and i guess i just need on of these plates to plug it into and flush mount it to my dash steve

Posted by cruisermedic 10 years ago

Replacing an old bathroom fan

This is an idea someone may be able to use, but it does not quite rise to what I would want to do as an Instructable. A widow friend has two bathrooms, each with a very dated bathroom fan in need of replacement. I was able to mount the works (fan motor, fan blade, and mounting plate) for the new fan onto the old mounting plate after modifying the old plate. This saved me hours of work in a very hot confined attic when time and tools available to me were quite limited. Had I torn out the carcass for the old fan and tried to put the new fan carcass in its place, I would have needed to fashion a wooden framework for mounting the carcass that would fit just right between the ceiling joists, all so the fan would be properly centered above the existing hole in the ceiling.  The mounting plate for the new works was just a bit smaller than that for the old works. The height and diameter of the new fan cage were very close to the dimensions of the old fan cage. I began by using a cutting wheel on an angle head grinder to cut through the old mounting plate around the circumference of the old fan cage. Then I positioned the old mounting plate over the new works and its mounting plate. The glass dish that would cover the light bulbs fastens to a shaft that screws onto a threaded stud centered between the corners of the new mounting plate. I sighted across the corners of the mounting plates so the threaded stud was centered. I clamped the two mounting plates together and drilled four holes for 10-32 screws 1/2 inch long and secured them with nuts and lockwashers. (I did need to cut out part of the new mounting plate so the fitting for the two electrical outlets [fan and light] were accessible to plug in both the light and fan cords.) Had the glass dish mounted to the works differently, I would have used measurements from at least two sides to the center of the fan's shaft to position the new mounting plate on the old. Once the two mounting plates were held together with four screws it was a simple matter to put the works into the old carcass and plug in both the fan and the light to their respective receptacles. There was no question the works would fit because they were attached to the old mounting plate that had been taken from the old carcass. The round opening in the ceiling drywall bordered on being too large to be covered by the escutcheon for the new cover/light fixture. I added some drywall spackling around the edges to close any imperfections and gaps. For me this was an idea that worked and saved me a lot of time.  

Posted by Phil B 5 years ago

flat plate evacuated solar panel

Hello, I am trying to figure how to make an evacuated flat plate solar thermal panel ( sort of this one: ). Main problem so far is how to keep air out (vacuum) . What sort of o-ring should I use ? Would it be possible to use Arduino to control internal vacuum and act a vacuum pump to keep it balanced in time ?

Posted by gabdab 8 years ago

I want to make a tiny hot plate

I am trying to make a hot plate about the size of a quarter to 50 cent piece. I am going to wire in a dimmer switch for temp control, I would like even heat so I dont know if nichrome is the way to go-I'd love to use some sort of flat type resistor but havent found anything on line that seems fesible. Also I would like to use a plug in power suppy. Any ideas?

Posted by yoss974 9 years ago

I'm trying to make a Breast Plate

Hey, I'm going to build a piece of FANTASY chest armor. I'm not going for realism or authenticity. Just making "a pile of spikes" that looks cool in my opinion. I'm thinking of making something to the equivalent of a low neck line tank top out of leather / tight weave canvas, and then covering it in steel plates. I'm thinking of dividing the front suit into groups and bands of plate. So I'm going to have a set of bands from the right and left chest, then another section that joins them down the center. A section for the abdomen, a section for each side, and then similar sections for the back. I'm then going to bolt the shoulders onto their respective chest plates. So I've done a crappy sketch on GIMP, Kinda explaining what I'm going to do for the center line of the chest. I think If I do this right It'll allow a lot of flexibility, might even be able to see my chest expand and contract while breathing which I think would be a cool effect. Is there any reason why this wont work? But are there any key factors that I need to take into account when doing this? Parts that need to be more flexible than others?

Posted by Deathcapt 9 years ago

quick release tripod plates

So for a few years now i've been using a small speaker setup strapped onto the tail of a longboard skateboard to provide music at skate meets and fun bike rides etc, and it's worked well enough, however at 13kg on the highest point of the board it has a tendancy to flop into corners and mess with the handling. Recently the amplifier broke so i want to use this opportunity to redesign the whole setup... for a start im hoping to reduce the weight by about 5kg i found this video ( on youtube of a skateboard sidecar for a child which i intend to modify for the speakers but i don't want it permanently attached to my board, would 1 or 2 quick release tripod plates have the strength to keep the mechanism attached to the board until i wished to remove it? i know you can get plates to support some particularly heavy cameras so would there be one that would be up to my task?

Posted by ambientvoid 2 years ago

SSR and a hotplate

Dumb question. Have a heating plate that uses 1100 watts and runs on 120 volts ac. if 1100 watss / 120 volts = more or less 10amps, Could I safely use a 10 amp rated ssr aka solid state relay or use something higher.

Posted by Computothought 3 years ago

Toxicity of chromium

Does anyone know the toxicity of chromium, or more specifically the toxicity of burning something chrome plated?

Posted by Tetranitrate 11 years ago

Smoker Grills

Looking over the DIY's for smoker grills. Why not use your Weber Charcoal Grill with the hot plate ? Slots at the bottom can provide access to hot plate thermostat. You would need to make a tool, rod with end fitting to engage the thermostat knob. cord can exit the grill through one of the bottom slots.

Posted by phantom9 8 years ago


This could become an instructable, but these days, juggling photo files from cell phone to email to comp to ibles is so dang cumbersome..    anyway, this is how i fixed ceiling fan. fan has a rubber plate between motor and blades. apparently a bit of wiggle room for blades is a desirable thing. but that rubber plate was cracking. the fan blades had begun to hang low and drag against the light fixture below em. so i removed the lights that hang below fan. removed all 5blades,  blasted dust off rubber plate with compressed air, and used used gel superglue from loctite brand to glue cracks in rubber plate. i specifically got glue in a tube, not a bottle, since ihad to apply it upwards.  i never removed fan motor from ceiling, so, the work was overhead. the glue says its good for rubber, and so far, it has held up. the fan is reassembled, and working again.

Posted by Toga_Dan 4 years ago

Light(ish) and non flexible.

I am toying with the idea of putting together a non flexible notebook case. I really liked the look of my Timbuk2 sleeve and other sleeves out there, but they always leave out adequate support to prevent flex when in a messenger bag. I am pretty sure that being flexed across my back while cycling with a good amount of weight pressing on it killed the motherboard (twice!) on my old notebook and would like to avoid it again. I need some materials suggestions though. I need a non-flexible material to act as plates to be sewn into the outside covering of the case. Ceramic plate would be ideal, but the things that I have found are anti-ballistic and ridiculously expensive. Plate steel would work but it is heavy. Anyone out there with experience with plate steel or aluminum that can tell me how thin I can go without flex, or maybe some advice on materials that I haven't thought of?

Posted by triplenine 11 years ago

24K Gold-Plated Bike for the Uber-Rich

A UK based insurance company, ETA, is offering a custom-made 24K gold-plated Charge Plug bicycle complete with customized seat, handlebars and chain to mark the Green Transport Week. The Midas themed ride comes with its own security guard. But, there are certain restrictions in case you want to buy this hell of a pimped ride like you must be eighteen years old, live in the UK, and get a free quote online for cycle insurance in order to enter the contest. One person will be randomly drawn after the contest ends on October 21st. This amazing two-wheeled ride is approximately worth $18,750 !

Posted by =SMART= 10 years ago

Electroplating Non-Metals

I'm looking for input on the process of electroplating non-metal materials. I have never electroplated before and am open to trying the traditional method or the paint on plate solutions that are available.  I'm just uncertain where/ how to begin and what to buy. The hurdle is that the items I want to plate are not metal to begin with.  One website I read seemed to suggest that painting the object with a paint that contains metal flakes (like Liquid Leaf faux gold leaf, which contains soluble copper) would be enough to get a paintable silver plate to bond. Anyone have experience to weigh in with?  I welcome suggestions for techniques, favorite products, etc.

Posted by ashleyjlong 2 years ago

Painting Aluminium

I'm painting some 1/16" plates of aluminium black. I gave them a wipe down, and used some generic primer and black spray paint. (I originally started off with a paint gun, but it broke). As the plate dries, it starts to crackle in some areas, but not all over. Any ideas what is going on? I've never had this problem painting steel, or wood. Do I need a different type of primer, specifically for aluminium?

Posted by sam 11 years ago

Arduino & Matlab

Hi, I'm working on a project  the ball - on - plate, and I have a problem in controlling the model of the MATLAB eg PID parameter . Please Help

Posted by aljaur 10 months ago

Things to do with LCD backlight guide plate and polarisation films?

I received about 15 damaged laptop screens and took them apart to get the CCFLs and inverters which I'll combine into a modest spotlight for video recording. From each laptop I also gained some films and the light guide panel. I believe one of the films from each is just a simple diffuser whilst the other two appear to also be blurry polarisers. Finally, each screen has an acrylic light guide which refracts the light 90° and does so evenly by having some kind of bumps or dots spaced out according to the "diffusion equation" so there are more further away from the source of light (which comes from the side).  Any ideas for what I might use these films and plates? I do have a lamp project for which I can use the diffusion film but the polarising films would probably absorb too much of the light.

Posted by THX 1138 1 year ago

Awful back-of-the-magazine tat

Somehow, I stumbled across this bloody-terrible piece of cack on the internet: Flying Scotsman-Memories of Steam Cuckoo Clock And remembering the: Elvis Presley Dambusters Clock Plate of Tutankhamun I could not honestly tell which was real, and which was a "piss-take". There are more... what did you see in the back of that thing you looked at printed on cheap-paper?

Posted by lemonie 8 years ago

Sciences PI Plate

Hi every ones, I'm a young engenner in plant biotechnology. On my free time i try to create an open source plate for the Raspberry pi which has lots of functionality very usefull for science project (Plant growing, Invitro cell, hydroponic control, compotemental study...) I'm really a beginer in electronics, but i read a lot electronic book, looking schematic and see video. This plate have : -8x relay 220V 5A control by a Darlington Array -8x Analog input -4x BNC connector connect to 4 Atlas Scientific Stamp (Ph, EC, DO...) -RTC clock (to be sure of time when data are store on database) -LCD screen 16x2 to facilite the reading without computer -This project will come with backend/frontend distribution Before i order all parts and PCB, i wondering if you be able to check my schematic to validate it and maybe improve it  :P Schematic Image files (2Mo) Fritzing file FZZ I have few question too  : 1/ Can i connect all my ICs and LCD to my external power supply, i read on internet this is better than connect on the 5V from the Raspberry PI? 2/ If i connect all 5V on my external supply how many amps i have to provide (the sum of all amps require by parts)? 3/ Do you know an I2C IC can replace the 74HC4052 to make all the plate in I2C and made it usable by more than a Raspberry PI ? (if it interesting) 4/ Which width is recommand for the wire on my pcb 24 mil (or smaller), and for the 220V Relay the biggest ?? Thanks you for your help, and your website ! Regards Erwan

Posted by wanoo 4 years ago

How to fix this cake stand?

Hi everyone! I bought this cake stand off ebay to use for our wedding cake. It's made of some kind of thin metal. The problem is that the upper plate seems wobbly where it attaches to the pedestal underneath. At this point I'd worry about whether it would be sturdy enough to support a 3 tier cake. I'm wondering if there's a way to re-enforce the seam between the pedestal and the plate to give it more stability? You can see the seam right below the "bowl" part of the upper plate. Would something like epoxy putty work? I'd like to avoid taking the whole thing apart if possible. (Don't mind the weird orange green colouring - I plan to spray paint the whole stand). Any advice or input would be great!

Posted by margogy 1 year ago

10-15 AMPs w/ potentiometer.

So, as a chemist I thought it would be fun to save some $ by making my own hot plate & magnetic stirrer. I am using Thermoelectric cooling device (TEC) to heat my stirrer, and a small DC motor to stir. Here's the problem - if you've ever taken highschool chemistry you will know that a hot plate with a stirrer has a potentiometer for Temp & Stirring speed - I'd like to do the same! Problem: the TEC takes anywhere from 5-20 amps in operation @ 12 volts DC. Adding a potetiometer to this in parallel is out of the question - I can't fine a potentiometer that can handle greater than 2 watts. ( i may just be looking in the wrong place)... So.. all in all I'm looking for nearly 140-170 watts of power for my heating plate. (The motor will be using much less, almost negligble to the heating plate) So, if I can't put a potentiometer in series for power regulation, how can I get my temperature to vary? If this is going to require a circuit board, I may need some help with a design :)

Posted by GreenD 8 years ago

push button contacts fail

Hi, i disassembled my full-automated coffeemachine as the push buttons for programs failed. The buttons are a line of rubber and the contacts on the platine are toothed while each rubber contact got tiny plates that bridge the contacts on the platine. I guess that the contact plates lack of conductivity - any suggestions what i can do to improve the conductivity? I thought bout buying contact foil and glue it over the rubber contacts, but i don't know, if this is the best solution.

Posted by Luziviech 2 years ago

best (inexpensive home) tool to cut thin brass cleanly?

I've been etching brass for a couple years now, but need a better way to cut and trim my plates than a hack saw and a straight edge... What's the best power tool for getting straight edges on thin brass plates? I've been thinking scroll saw or band saw, but I've been told that band saw blades will walk. would a scroll saw be a good idea?

Posted by gschoppe 9 years ago

Connecting the Arduino to the Matlab

Hello I am a student electronic engineering I'm working on a project (the ball - on - plate) and I am having trouble connecting Arduino with matlab please help

Posted by aljaur 10 months ago

Swivel Castor Wheels from Other Types of Wheels?

Is it possible to make swivel castor wheels from skateboard, rollerblade, rollerskate, or other type wheels? I know there are swivel plates by themselves, but would this be used? If so, how, if at all, would the above types of wheels be attached? Or just use some type of swivel bearings? Wood? Something thru the middle of the wheels? Fixed castor wheels attached to swivel plate? Any ideas, other poss optons, to be able to make? Thanks

Posted by MelPhleg 3 years ago

Wanted: Magnetometer LED Matrix Controller

I have an idea for a light grid control module for home usage, based upon the assumption that a grid of LEDs will be used as overhead lighting in a room, not to dissimilar to this instrucable: The materials should roughly include:   - a ferrous plate (copper, or alloy to possibly reduce cost) - magnets (could be non-rare earth, to keep cost down) - magnetometer sensors and a circuit to determine magnetic field strength (example:  - transformers (possibly) My thought is that either one or, most likely, a grid of magnetometers could be arranged in such a way that it is placed in a circuit that resides almost directly behind a ferrous plate.  When magnets of varying field strength and size are placed onto the plate, sensors would detect the field strength and given the relative location of the field based upon which sensor(s) is/are activated, send a value that will cause a controller to allow however much current to that respective light and (possibly linear) falloff to neighboring lights in order to create a low-resolution (think 8-bit) "spot gradient". In the off state, all magnets would be removed from the plate, or power to the circuit would be disabled, or power to the lights would be disabled. Ideally this controller would be mounted in the place of a wall switch, with some kind of reservoir for the magnets to reside when they are not attached to the ferrous plate. It should have the most simplest setup possible to reduce cost.  It could be done with a regular circuit or an arduino-based controller, I think. All input welcome.  Unfortunately I am not an EE and have only a rudimentary of electronics, but I think this is totally possible.

Posted by r_w_king 5 years ago