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Only read this if you are a kind person. Thank you.

Thank you for taking time to read this post. I realize it is rather long. If you are not a patient person, you may wish to simply skip reading this.I live in Washington DC and am looking to purchase something very specific, preferably from a reputable online retailer. I am a simple person, without any formal education. I know nothing about electronics or engineering. I hope you can be patient with those facts. I have no tools, no skills, no money, no knowledge.I'm searching for something that has been surprisingly difficult to find. Please, if you haven't got anything constructive to comment about this post, would you please just not say anything? Life is already difficult enough without negative words or sarcasm. Perhaps you might know of other internet consumer bulletin boards/forums that might be better places to ask this question? There don't seem to be very many at all.I am well aware that most modern cell phones easily fill the requirements that I am about to describe. Unfortunately, this item is needed for elderly people who are very suspicious of and dislike all things new. They violently refuse to accept a cell phone.Even if perfect, it's going to be a battle to get them to try it or use what I am searching for.So. Here we go. Maybe I can't find ALL the features, but here is what I am hoping to find:This needs to be a digital timer that can be set to go off at a minimum of six different times in one twenty four hour period, regularly.It has to have both an audible alarm and a strong vibration, and it has to be switchable between these two. Even better if it also flashes or lights up when the alarm goes off, and that also has to be optional, switchable. Very good if the strength of the sound or vibration can be adjusted easily.Should have a belt clip, preferably made out of metal, not cheap plastic.Should have a place where a neck rope could be easily attached and detached.Should have buttons that can be locked, so that no accidental changes by accidental bumping will occur.Should be water resistant. I'm talking about it being able to take a splash from a sink, not something to withstand being taken in the shower.Should also function as a typical normal digital watch with calendar feature. should be SWITCHABLE between calendar and clock view, so that all letters and numbers are as LARGE as physically possible,not all crammed on one tiny screen.Display should be larger than a normal watch, but the overall device must be small enough that a senior would not be upset to wear it around the neck or put it in a pocket, such as a normal shirt pocket.Great if it includes a strong LED flashlight feature, something with an on/off button, NOT a button that you have to hold the button down every second that you want the light to beam.Display should either be always back lit or at least have a button that will make the display light up without having to hold that button down the entire time you want it back litGreat if it came with a DVD of instructions with video, not a flimsy booklet with tiny letters written by someone who can't correctly speak English.It must run on batteries that can be purchased at any national retail chain, such as WalMart or Target. Fine if it has a very long life rechargeable battery built in, but not so fine if that battery is welded in so that it deliberately cannot ever be replaced.Good if it is able to run on the type of rechargeable replaceable batteries such as Nickle Metal Hydride or one of the others, without damage to the device.If it MUST be a plug into the wall rechargeable type, the cable cannot be a tiny pain in backside USB cable, it should be very simple and EASY for someone with arthritis and bad eyesight to plug in, perhaps with a charging cradle dedicated for the purpose, which can just be left plugged in somewhere.The charging device should have bright clear LED lights showing both that the device is currently charging as it should be, and another light that will FLASH to indicate it is now fully charged.Should sell for a price that a person that worked a lower middle class life and now barely gets by on Social Security could afford to buy. This device is not for me, if that matters at all. It is for people I care about.

Question by bearcat2222  

Why my servo doesn´t work?

Hi, I have tried this project : , about controlling servo with headphone´s jack, I just bought 2 servos TowerPro SG90 and when I tried both, none worked. Firstly I tried it with a 3,7V battery, then with a USB (5V), later with a 5.2V battery and finally I put the same as the tutorial (9V) but it didn´t work. I tried with the audios provided in the tutorial and I did new ones with audacity, with 1000hz frec 1ms duration (clockwise) and 500hz 2ms duration(counterclockwise), coping and paste every 20ms until completing 2 sec, but it didnt do anything. I want to know if I am doing something wrong or the servos are just broken (newly purchased).I edit, I just realized that if I apply 5V on the signal wire, it moves, is that because it is broken?Thanks for the help!

Question by pacomurso  

Anyone know how to make the Claire Burke Original fragrance oil for an effusion lamp?

I'm trying to locate "recipes" for a DIY effusion lamp oil. I found the basics-10-12 drops of essential oil per 16 oz. at least 91% alcohol, but some of these oils are expensive also. I'd like to recreate the Claire Burke Original scent-it, of course, has been discontinued.Any directions for the Applejack and Peel scent would be helpful too! I have the lamps, but the refill oils for all brands are really expensive;the alcohol can be found at drugstores and Wally-world for about $1.50/16 oz. bottle.The Essential oils are a bit more expensive, but all the info says one must use these-Not the fragrance oils. Apparently, those mixtures will clog the lamp wick or stone .Any and all suggestions for recipes and how many drops/Ml. of  the different oils-for ANY fragrances- will be welcomed.

Question by sandfoot    |  last reply

Robot battery

Hi everybody I build my robot actually I have a 12v 12ah lead acid battery ( I would like to change it but I don t if I choose lipo or lifepo4 or li-ion? My principal goal is loose weight and size, so I think about lipo but I am not shure

Question by LaurentP30  

Ammonia + Aluminum?

I was reading all of the labels on things in my house, mostly spray-able things like spray paint, spray adhesive, spray enamel, etc., etc., to see what's flammable, and on the bottle of ammonia we have it says "Do NOT use to soak aluminum utensils in...." or something like that. What does ammonia + aluminum equal or do? Is it flammable? Thanks all you chemistry-buffs!

Topic by Bran    |  last reply

Is this ambergris

Hi,My dog bought this item to me whilst walking along Duranbah Beach in Queensland Australia.It floats on water, weighs 323 grams, has a nice sweet smell. Ambergris buying experts in France say "definitely not ambergris".Passes all the tests for ambergris including hot needle.James Cook University, 5 marine biology experts came back to say "not certain from photos but most suggested ambergris"One image on ambergris New Zealand buyers website looks almost identical to this piece.I really would like to know what it is, if anyone can help with guidance or perhaps seen similar.Look forward to feedback.Thanks in advance.Best RegardsBrendan WarlowSheldon, Brisbane, Queensland, Australia.

Topic by BrendanWarlow    |  last reply

Correct crossslot for NAS and MS screws?

Do anybody now the correct crossslot standart for NAS (National Aerospace Standard) and MS (Military Standart) screws? is it Phillips? Frearson/Reed/Prince? JIS/JISC? or any standart else?

Topic by 1Bln65  

how would you build a portable ice maker?

I want to know how to build a portable ice maker that could run on 120v and 12v or just 12v so i could use it in the RV or who knows. i have seen them for sale but no one ever has them can some one help with ideas on this or insight ty

Question by krazymike58    |  last reply

how many Popsicle sticks dos it take to make a truss bridge ? Answered

I'm doing a science fair prototype bridge but I don't know how many popsicles sticks to build a truss bridge

Question by adamray2106    |  last reply

Any ideas on how to create solid roof for steel framed gazebo?

Have one of those $180 steel framed, 10 x 10, two tier roof, gazebos that every retailer seems to sell now a days. (kind of like the one in the picture) Its perm attached over our hot tub. Problem is, the nylon top keeps deteriorating and then shreds and has to be replaced. Any ideas on a good, cheap or maybe recycled material, roof that would be permanent? (WI=Snow in winter, has to be strong enough for an occassional storm) And how to attach it maybe? Looking for a few brainstormed ideas because all I can think of is boring PLYWOOD! *GRIN*

Topic by kellyndiy    |  last reply

What is the best way to update an Instructable?

Hello everyone,a few days ago I published an Instructable "Card Sorter for a Trading Card Machine".As I mentioned in the last step, there are some to-do's that I have to fix.What is the best way to update an Instructable?Create an new step at the end with all informations?Update the excisting steps and delete to old information?Any other ideas?Thx.

Question by theguymasamato  

Problem with compressed air, ping pong turret

Hello all, I am in the process of making a ping pong ball turret powered by an air compressor, I’m using a solenoid valve to trigger the air electronically.i have had some exact diameter steel pipe milled out which is 250mm, so the diameter of the balls are 40mm and the diameter of the pipe is roughly 40.5-41mm. And I’ve sealed off one end with a tapped out hole for a nozzle fitting. My compressor goes up to 7 bar -around 100,psi -. Do finally to the topic 0f my question, i have tested the firing of the balls by firing 7 bar through an compressor gun, and to my surprise it didn’t fire across the garage like I expected, instead it made a very high pitched noise and the ball vibrated inside the tube, eventually the ball would rise up the tube and eventually speed up towards the end of the tube but still only launched at most 1 meter. Any help on how to fix this problem would be excellent. As I expect 100psi through an exact diameter tube would fire the ping pong ball very far. Feel free to ask any questions if I haven’t been detailed enough. Cheers

Question by bashmore00  

Convert jam khm600 haze machine to wireless

Hi I have a Kam KHM600 Haze machine which currently has a wired controller. I would like to convert it to wireless operation. Does anyone have any advice on how to do this?

Topic by Chrisg54  

Why doesn't my internet work properly on my laptop but it works fine on my PC?

Hey, can someone please help me? I have this problem and its really frustrating. My problem is..When I connect to the internet it usually says I have internet connection but Google Chrome says "The web page cant be loaded" and after a few minutes my internet connection goes down and says I have no internet access. So I reconnect to the internet and the same thing happens, I repeat the process and a few times it works but only for a few minutes and then it happens again. (The internet works perfectly fine on other laptops and phones but its just mine for some reason). I asked this on another site and someone told me to go to "My Computer" and then right click it, then go manage, then to click on "Device Manager" and then click on "Network Adapters" and to double click on each of the Intel (R) things there. Then to click on the power manager tab and untick the box that is ticked. I have also done this: 1. Click Start, go to control panel. 2. Click Network and Internet. 3. Click Networking and Sharing Center. 4. Click Change adapter settings 5. Find your wireless adapter, right click it, and click Properties. 6. Scroll down to Internet Protocol Version 4 (TCP/IPv4), and double click it. 7. Click the radio button that says "Use the following DNS server addresses:" 8. Put for the Preferred DNS server, and for the Alternate DNS server. 9. Click OK and test your internet. Can anyone please help me?

Question by Asghar123    |  last reply

Make a CNC with Camera

Hi my friends.I want to make my own CNC Router,but i want to add an Camera for point positions and cutting through black lines using mach3.\I will send an youtube link from one CNC that has this function.If anyone has an idea how can make something like this please write to me.

Topic by elami123    |  last reply

Mega 2560

I bought the 2560 from amazon it came with cd but the 33 lessons r not in the code book tool how do i retrieve the right codes it has a 13 lesson starter kit in the code book i down loaded that it sent me to they dont match the lessons??/

Question by MathewW9  

How do I make a power indicater light for a bluetooth?

I have Bluetooth headphones, & I'm modifying them. I want my Bluetooth to light up tow external LEDs when I turn the device on. I can't wire a line to the micro LED, its to small for me to solder. I was thinking wiring the External LEDs to the Bluetooth's battery. Is there a way to make a simple connection from the battery, to the external LED wire & back to the circuit board, so when ever the Bluetooth is switched on, all the external LED is indicating is the power going to the circuit board?

Topic by elkaddalek    |  last reply

is popcorn a veggie?

Well popcorn is made of corn right? well, does it count as a veggie then?

Question by SmeXy!    |  last reply

Common materials for Clock hands? Answered

Hi!! I'm trying to create a clock out of a music CD and his cover... i've the mechanics and i've everything i need, i just don't know where to find the material to create the minutes and hours hands of the clock... Do someone of you know some common material that i can use to make them? something not too hard to be found... i've seen that usually they're carved out of some alluminium, not too hard or too fragile, easy to cut... If i manage to find the parts that i need i'll make a guide, i think that my idea could be appreciated :)

Question by FenriX    |  last reply

Why an Instructables failed to publish?

Why there is the following error message when I tried to publish an Instructables: Your Instructable Failed to Publish.

Question by babybayrs    |  last reply

transistor keeps burning out in the circuit!

Hi everyone! i followed this 'ible ( to make a laser burglar alarm for an electronics project. i soldered everything together properly, followed the schematic and all, but every time i connect the battery, the transistor just explodes, like, there's a small spark and next thing you know, its damaged. what can be the reason for this and what can i do to solve this problem? i've already used 4 transistors and all burned out! please help!

Question by here_to_learn    |  last reply

Calculate DC motor specifications (torque power etc) for electric vehicle

Dear Sir/Madam, I want to make an electric car like as shown in figure below., with a DC motor. assume no inclination, road is plain surface. please explain all calculation with formulas.THANK YOU following is the basic known parameters: Total mass of car(including rider and everything) = 250kg initial velocity of car = 0 (still car stop) max velocity = 60 km per hour time to reach max velocity = 1 minute = 60 seconds radius of tyre = 8 inch please tell me how could i find the following parameters to find accurate DC motor for my car: how to calculate force needed by my car? how to calculate torque needed by my car? how to calculate speed RPM of a motor needed by my car? how to calculate power (watt) of motor needed by my car? how to calculate battery needed by my car to travel 10 km in one charge?

Question by fawad_pappi    |  last reply

Top 100 Instructables of 2018

Here's a look back at the 100 highest-viewed Instructables published in 2018. It's a fun collection full of inspiring, clever, and educational projects. Be sure to take a look:Top 100 Instructables of 2018Thoughts, comments or observations are welcome below!

Topic by seamster    |  last reply

Call for videos!

Aka How to receive feedback, get featured, and be awarded internet fame + more!I know it's been a minute since I've put a post like this in the forums, so allow me to (re?)introduce myself.Hai!I'm audreyObscura. I love making stuff, playing with cameras, petting dogs, and eating pizza. I've worked here at Instructables since 2012 doing a little bit of everything, and I solemnly swear that the best thing about working here is getting to learn something new every day from amazing community members like YOU!These days, a good chunk of my time is spent queuing our posts on social media platforms and boosting Instructables authors that use Twitter and Facebook to share their projects. (And finding the perfect gif to reply to Twitter threads, I'm very good at it - try me.)I'd love to start featuring more videos and gifs on our channels, but need a little help from the community. We are looking for media to help give YOUR INSTRUCTABLES a boost on our social media feed! What we'd like to receive:Great, high quality, short-form videos (under 1 minute) GIFs! Under 3MB preferred (bonus points for perfect loops)Examples: What we don't want to receive: YouTube URLsProjects hosted outside of What you'll get out of it:Momentary internet fame and all the warm and fuzzies that come along with community recognition!An Instructables Author Thank You pack in the mail which includes our super sweet Robot Stickers, an idea notebook, pencils, and a super fun enamel pin!Feedback! We want to work with you and coach you through making great feature-worthy content. If you share something that isn't quite up to our snuff to post to our channels, have no fear, we'll still send you a little gift AND let you know HOW you can improve your content!If you go above and beyond, maybe we'll send you something extra too, so impress us! Send your vids to this email address!Have you already posted an Instructable with a great demo video or explainer gif? Drop us a link in the comment section below and we'll review your project to see if it's a good fit for our social media feed!Lastly, I wanted to leave this post with some inspiration and some skill building tips to get started. Hope these help: How to make a gif How to turn movie clip into a gifPlease comment below with any questions you may have, and I can't wait to see what you share.Thanks!-Audrey

Topic by audreyobscura    |  last reply

What projects are you working on during break?

For those of you who have time off over the holidays, what will you be working on?I have 3D printing and laser cut jewelry ideas I want to work on both for Instructables and Etsy while I (hopefully) have some time and I was curious if people had plans for projects they wanted to try to get done.

Topic by Penolopy Bulnick    |  last reply

Nichrome wire won't heat even with a car battery.

I have some very thin nichrome wire that I pulled out of an aquarium heater. I think its about as thin as the smallest wire on an acustic guitar. I'm trying to use it to cut foam for an rc plane but it just won't heat up enough. I'm trying to heat up a good 20 inches of wire so its quite a lot, but I thought for sure a car battery would handle the job. Right now it barely gets warm, I can leave my hand on it indefinitely without it feeling hot.Should I just strip a power cord and plug it straight into a wall socket? Also do I need a thicker wire? I know a thicker wire would take more to heat up, but this thin wire breaks easy so I'm unsure if it will be able to withstand tension when it actually gets hot.I really don't want to have to order a bunch of crap to start working on this plane but I guess if I absolutely HAVE to then I will.

Question by warhawk373    |  last reply

Using a hall effect sensor with TL494 pulse width modulator.

I have an electric billy cart with a dead controller board. I constructed the kit circuit below to replace the dead board and it works well enough for the job except for one small problem. The throttle on the billy cart utilizes a hall effect device and not a pot. The billy cart also has a handbrake with a switch that closes when applied. I use this with a resistor to discharge C2 and pull pin 4 (inhibit) high. This ensures a gentle start (as the capacitor slowly charges through the 100k resistor) if the brake is released with the throttle advanced. The output range of the throttle is 950 mV to 4.1 V if VREF (5V) is used as the supply. (I'm dropping it in in place of the pot.) 4.1 V is sufficient to achieve the maximum 90% duty cycle of the chip, but 950 mV leaves me with a minimum duty cycle of about 21%, and of course a motor that won't stop. Will changing the divider ratios 20k/2k2 & 47k/47k be sufficient to get me zero speed or am I going to have to do something more exotic? Thanks in advance.

Topic by Rasputin182    |  last reply

Wisdom Needed to Create a Translucent, Waist-high Boulder

Hi Folks, I need some help. I need to build about a dozen waist-high translucent boulders. They must be shaped as though they are naturally-occurring boulders, approximately rectangle shaped so that they can be stacked, and see-through so that I can put LED lights inside and have their illumination and color visible from a distance. This is for a backyard, outdoor art project to decorate the grass around an in-ground pool. Your wisdom and all thoughts are greatly appreciated!

Question by Calico Max  

Does anyone know what shape the knives are in Ranger's Apprentice? Answered

I've loved this book series for so long and recently I have gotten into costuming. I (obviously) want to make a Ranger costume but I don't think the covers of the book are all that accurate (the cloaks are green while in the book they're mottled grey/brown/green).  A similar question I posted when I first signed up to this website returned the answer that the Saxe Knife looks like a Bowie knife, but I don't know if that quite fits...  Any suggestions would be helpful, also any tips for the rest of the costume would be appreciated.  Thanks in advance :) UPDATE: I'd like to rephrase this slightly. Does anyone know of a blade shape that couldsuit the saxe knife? It is a costume of a fictional item, not a re-creation so I figure a stylized shape would be better.  UPD

Question by Splicer02    |  last reply

Modifying an existing instructable or posting a new one

So I have an instructable for a Lego table I'm in the process of building a new one with a better method for the legs and also a track to hold some storage bins should I just modify the existing one, make a whole new instructable with all the steps, or just a new instructable with just highlighting the changes I did

Question by Itsatrav  

Induction Heating large scale

I am working on a project and have a large tank full of product kind of a greasy substance trying to heat up to temp of 180 degrees. the tank currently has a 4 inch pipe running inside wall all around tank for heat transference.. At this location a boiler is not a option at this time . I was curious if anyone ha s ever attempted a large induction heater build one that would encase a 4 inch pipe and heat liquid inside so thermal transfer would heat our product. Sorry for not including all details at this time i just curious if large induction heat was possible or efficient ?Thanks,

Question by andy1917  

How to program RF LED remotes so they work individually?

I have two of the same LED Controllers with RF remote controls.(See attached image)Is it possible to have one remote control one controller and one remote control the other?As they are set up now, each remote activates both controllers and I can't seem to separate them.I have followed the instructions in the attached image, but no dice..Thanks for any help!

Question by denogginizer  

Can anyone identify this item?

It is an old foot pedal, cast iron. It has both incoming and outgoing electric cords. Both leading from the perferated round cylinder. The pedal is spring loaded and returns to the up postion after the pressure is removed. Thanks

Question by tekutch    |  last reply

How is the wearable battery designed to last longer?

The kicker now is that your smartphone holds far more information than a pocket ever did, How is the battery designed to last longer?

Topic by EvaW23    |  last reply

Can a board be bypassed? Answered

My sewing machine (a Pfaff 1171) dies after about 10 minutes. When I push on the peddle again, there is nothing... no hum - absolutely nothing. The light stays on.  Wait fifteen minutes or so, and it runs just fine...only to repeat the cycle.  Turning the wheel doesn't change the electrical situation.  It's almost as though a fuse is blowing and then resetting itself. I took it into the shop, and the verdict is that it's either the peddle (unlikely) or the board inside.  The board is no longer made.  If I turn the wheel, everything works... forwards, backwards, stitches and all that.  It's a great machine mechanically,  and I hate to lose it because of some glitch on a board.  Is there any way that a board could be bypassed?  I can survive without a bobbin sensor and being able to set whether the machine stops with the needle up or down.

Question by mole1    |  last reply

The future of mobile operating system or the end for "hackers" and rooting?

For mayn years it was almost logical to get full root access on your new smartphone or tablet.The other fraction might now it as "jailbreaking"...No one really needs it unless they are not happy with they way the mnufacturer designed the operating system and features.The removal of bloat, apps the user never needs, is still the most common reason for rooting.Custom ROM's offering a different experience are right behind.Now we also have TV's, entertainment boxes of all kinds, even from our ISP's directly.The main provider for the operating system is now Google with only a few "competitors" left.Apple has a strong hold of the mobile and tablet sector too but is not really presented in other areas.Android is still open source but Google heavily modifed it to suit the needs of data collecting and security for features like banking, access control and so on.What is good for the normal user and perfect for those with security in mind can be really bad for those actually just using a device.No matter why you buy a new phone from your provider, you almost never buy it for the added apps and services.Rooting has become more and more difficult.One reason of course is constant security updates and removing possible access options for even simple things like getting USB debugging and an unlocked bootloader.People dedicated to find ways to remove provider locks, creating custom firmwares or the basic tools required to work with firmwares were called hackers.If you buy a new car and decide to modify it with a new engine, seats or whatever than no one will stop you.So why don't we have the same rights for our electronic companions?I wouldn't call it hacking, I would call it actually owning and controlling your device instead of Google letting control you - or Apple, but who cares....The other reason is dead simple: Those guys who started it all have retired or found employoment with those they fooled for so many years.Chainfire should ring a bell for anyone ever concerned with rooting.The master is gone now and only a few people are willing to take his legacy.For Asian devices the community over there is better off but for our market region right now Magisk seems to be the only option left for modern devices.The sneaky ways to lock us out....Security comes at a price, simple as.You can offer secrity for money transfers if the device is not trustworthy.Same for online streaming - you want the money for what you give and prevent that someone is able to make unwanted recordings without encryption.The list goes on with access control system and literally everything we use our devices for that involves some security.Even with the lates PIE systems Google's own devices are still quite friendly in terms of gaining root access.Different story though if a manufacturer makes full use of all the latest addition at Google's disposal.Device security no longer starts with the boot we see.It is now possible to create a hardware based tree of trust.This means any modification to anything will cause a failure.This locks out all "tools" able to read out partitions and vital data while a device is in fastboot mode.And of course said fastboot can be fully disabled as well now.For security reason a so called A/B configuration is used.Updates come over the air and are applied to the dormant system.Next start will boot the new system and then update the old one, no requirement to manually apply and update.The recovery can also be abandoned and replaced by a system using a copy on the device itself that is updated through OTA updates with the firmware.So both ways to gain official access can be full removed from the user.From there we get encryption, hash checks and literally everything working in its own user space - a full SELinux enviroment at the highest level.There are already devices utilising a lot of this and so far the only way to get any sort of insight was done by those intercepting OTA updates on a router level.And apart from quickly changing the encryption with the next updates nothing was gained.Is it all coincidence?Of course not.Well known leaks were kept open for years.Kernel updates gave improvements and closed really old leaks but never all known ways.With the retirement of the best rooting experts these holes were suddenly closed.Checks of latest kernel releases showed that there is no known vulenerabilities anymore that can be misused to gain access.And those finding new ones and making them available for us are bascally gone now.Encryptions and packing algorithms changed, same thing for the actual handling of partitions and rights.Anyone with a decent understanding of how the old ways worked will be able to figure it out with some time wasted on it.From there however the outcome is often dark.The tools needed to work with these new files are not always updated anymore.The developer simply moved on and most of the time without publishing his source codes.And the still best way to protect your firmware from tampering is to encrypt it.In the old days it was enough to sign a ZIP file with a release key not available to the public.Custom recoveries allowed us to get around this.This still works to some extent but now we also get additional checks starting from the bootloader.A modified system will be detected and stopped and a stock system will stop i a modified boot is detected.Even using a custom recovery by flashing or through fastboot is preventable now.Right now the only way for most new devices is a total wipe and the installation of an unsecure firmware with everything.As you already guessed this is to prevent now as well.So does all this rooting stuff actually concern you?Of course not!If you never had any need for rooting or no clue what to do differently with a rooted device than you are a happy camper.But your neighbour or friend might think differently.You see, I have two problems when it comes to "stock" devices.a) I have no clue what data they collect from me and what it might be used for.b) I do not like being forced to agree to terms that are endless and of questionable content just to use the damn thing.For crying out loud: In most cases it is now impossible to even set up a new device without working internet and a Google account.....

Topic by Downunder35m  

I have a swann wireless 2.4Ghz camera with no receiver. How can I use it with my PC or laptops? Answered

The camera is a Swann nighthawk 2.4Ghz wireless. I do not have the receiver that came with it, just the camera itself. I would like to make some kind of usb receiver for it or find out how to pick up the signal with one of my laptop. Both of my laptops are state of the art tech. Toshiba, and an Acer 4530 with euro software on it that gives it some rather unusual wireless capabilities. Anyway... I would like to make, modifi, or build a receiver for it. If you can give me a little direction I would be very greatful.

Question by bones92653    |  last reply

How do you electroplate, or plate, small jewelry pieces of copper or brass with sterling silver?

I make jewelry and would like to cover some small jewelry parts/ findings/ charms with sterling silver. The parts are made of copper and some of brass. I would need to do this in my home. If this is possible, how do I go about it? What supplies and equipment do I need? Thank you, Laurel Martin

Question by laurel1    |  last reply

I need some soldering advice from you guys

Hello Everyone - I am trying to solder a different type of a joint, and I'm having a problem doing it. I am hoping someone here can tell me what I'm doing wrong (or not doing). Here is my problem:I am trying to solder an alligator clip to a 3/16" dia steel rod (I have a picture of this joint, but for some reason, I can't upload it).When I heat up the joint with my propane torch, the alligator clip goes red hot first, and the rod takes a while longer. The rod turns a really dull red, but never as hot as the alligator clip, because the clip is only ~ 0.020" thick. I have a roll of silver bearing resin core solder that I am using. When I apply the solder, it just sorta balls up and won't flow over the metal at all. I end up with a bunch of melted balls of solder on my table, and that's it. I didn't try using any flux, because this solder is resin core. Is there an inexpensive way of doing this ? Does anyone here know a method that works ? thanks in advance, Terry

Question by jw58479    |  last reply

My scooters forks/wheel has gone out of sync, after a slip on road thing is need a quick fix so I can get it back home, so I can replace thanks in advance...

My scooters forks/wheel has gone out of sync, after a slip on road thing is need a quick fix so I can get it back home, so I can replace thanks in advance...

Question by AlanW131  

Power supply problems for my project

Hi everyone. I'm stuck with power supply problems in my project. My project is a drink dispenser (cocktail machine) with water level indicators. I was thinking of putting 4 water pumps connected to relay modules, controlled by Arduino or microcontroller (something like attiny). The microcontroller would receive a command with 2 push buttons (tasters) and depending on the button pressed, it would combine 2 liquids from 2 tanks into one glass. Now, the code isn't a problem. I need to add a liquid level indicator to the circuit (4 indicator circuits for 4 liquid tanks). Now, the pump I was thinking of buying is rated 5V and the current draw is about 150-250 mA. Attiny2313 operates on 2.7V-5.5V. I found the water level indicator circuit also rated 5V ("" but I was thinking about the one without 555 timer). Now, my question is, what is the best way to power all these components. I was thinking about getting a 220V to 5V 2A PSU adapter (""). Will that be enough and will it destroy any of my components. Thanks in advance!

Topic by Kvragu  

What glue to use to fix my sun visor

My sun visor has broken on my 2012 Chevrolet Sonic. Pretty much same as this guy, Because I'm cheap I was going to try to glue and treat it gentle instead of paying $40 for a new one. What glue would give me the best bond and any idea how (if needed) to clamp it while it sets? The plastic has ABS written on it, so I presume that refers to Acrylonitrile butadiene styrene.

Question by bp2000  

Cheap battery powered - timed Arduino light?

Hi all, For a research project, I need to create as cheaply as possible a LED light that is battery powered and that automatically turns on every 30 or 60 minutes (and turns off automatically after 1-2 minutes).Any ideas/links on how I might do this?

Question by pauliusyamin  

Enter a contest twice

Is it allowed to enter 2 different projects in the pcb contest?

Topic by FriedZombie    |  last reply

A good glue to stick aluminized Mylar to PET

We are making a parabolic solar hot water heater and have been working on it for several years now.  We have been searching for a better glue to stick the 8' x 4' sheet of aluminized Mylar to the PET backing.  We have tried everything from axel grease to double-sided tape but really need something that we can roll on with a paint roller, that won't eat the Mylar (which is basically plastic) and which will allow us at least 5 minutes to place the Mylar and to move it around a little until it is in position - and then harden. The most recent type of glue we were looking at was something like the glue that comes in a small stick that kids use for making things with paper - a glue stick i think it's called.  However this is not liquid enough to be able to be applied with a roller (i suspect we need a roller in order to get it on fast before it sets). Anyway, any suggestions would be greatly appreciated!  Have a super morning!  :)

Topic by frazelle09    |  last reply

Does anyone have circuit schematics for a battle robot? Answered

Could you also give me part names if possible, i have some ideas but im still confused. This is my first bot, thanks.

Question by DaNerd11    |  last reply

Roberts Clock Radio - dimmer - Model CRD 26

Clock working fine except that when it is dark there is no time displayed and it is obvious that the dimmer is sensitive.Open up the clock by removing four tiny posidrive screws and carefully prising the top and bottom apart. ( preferably with a plastic prising tool to avoid damaging it). Disconnect the supply to clock. Small white two pin plug in the motherboard attached to dimmer. Remove plug and short out (connect together) the two pins that it plugs into. For a simple repair push some aluminium foil trimmed to size (like the thickness of aluminium foil on shop bought mice pies) between them. This will eliminate the dimmer and allow the time to be displayed in the dark. unaffected by the dimmer.. OR simply snip the red and black wires and join them together.These clocks cost about £60.00 so it's worth doing.

Topic by poor1  

Voltage: In search of a better analogy than water

I need to come up with a good analogy to describe the concept of Voltage. Water seems to be the most common analogy, but it seems to fail in some way. Here is a good water analogy that I found, but it still leaves questions that I cannot answer.The Lake Analogy: No force is pushing or pulling on the water inside a lake, so nothing moves. If it were possible to lift up on one side of the lake and tip it at an angle, gravity would pull on the water and it would flow. We have created a gravitational potential difference. The side that we lifted up on now has a higher potential than the lower side. Gravity will always cause water to flow from the point of highest potential to the point of lowest potential. The higher the difference between these two potentials, the more electrons will flow; the greater the current will be.Electricity is the same. When we attach a battery to a copper wire, the battery’s internal chemical reaction has created an electrical difference in potential. The negative terminal of a AA battery, has a higher potential than the positive terminal, so electrons will flow through the wire from the negative terminal to the positive. In this case, each coulomb of electrons will have the potential to do 1.5 joules of work as it passes through the wire. QUESTIONS: Does Voltage Push or Pull Electrons? The negative terminal of a AA battery repels electrons. This pushing force is what moves the electrons. However, we also know that electrons are attracted to a positive charge. So, are the electron being "pulled" by the positively charged battery terminal while being simultaneously pushed away by the negative terminal... or... does the negative terminal push the electrons away to a certain point, when the positive terminal begins to pull on them?With water, the only force is gravity, which is a pulling force. But with flowing electrons, it seems like the water analogy would require a pump there is only a pull, and no push. I guess... if you use a water pipe instead of a lake, and you use a water pump as an analogy for the battery, the end where the water is pushed out of the pump would be the negative terminal, and on the other end, water is being sucked into the pump, so that would be the positive terminal. But could you say that the sucking action of the pump is pulling the water towards that end, or the pushing action of the negative end is pushing the water towards the positive end? or Both? If so to what degree, and when? Meaning... as a water molecule is pushed out of the pump, is the sucking end already acting on and affecting the molecule, or does the sucking action only exert force on the water molecule at a certain point? It's all a real brain bender to me. Does anyone else know of a rock solid voltage analogy, or how I can improve this one?

Question by Dolmetscher007  

turn a old plotter printer into a laser cutter? Answered

Awhile back my wife and I bought an old plotter @ a yard sale, unfortunately the pens are dry and i'm unable to purchase new. I thought about turning it into a laser cutter. Can anybody help me with this. thaks to all.

Question by castothomas    |  last reply