How to make solenoid retract when friction applied.

I have a 12V solenoid that was going to be used in a project with a spring loaded door. It was wired into an arduino project and all was going well. That was until I realised that if the bolt had any friction on it that it would not get retracted when power was applied.I wonder therefore whether there is a simple way of making the bolt retract even when friction is being applied?Alternatively, is there a simple mechanism that could be made where friction can be applied to something else that doesn't add friction to the solenoid bolt itself so that when the bolt is retracted the secondary part is free to move and release the sping loaded door.Any help would be appreciated.

Question by mjolnirofthor 1 day ago  |  last reply 20 hours ago


Help: First project - Bluetooth HUD/Router (i don't know what it would classify as)

OK Here's what i'm trying to make you guys. Essentially id like to make a device that will connect to a smart device via Bluetooth and also can connect and transmit to up to 5 Bluetooth speakers (of any brand). i know some Bluetooth speakers now have duo casting or whatever its called but i would like to go a step further. honestly i have no idea where to start, currently what im thinking is using some model of raspberry pi as the backbone of this unit. i would imagine id have to wire 5 bluetooth transmitters and one bluetooth receiver to the pi but i have no idea how i would program the pi or wire it up. as said before this will be my first project so i am rather new to this whole concept of diy but i love the idea of making my own gadgets. i want the pi to recieve bluetooth audio from a smart device and then redirect the audio to the 1-5 other bluetoooth speakers that could be connected to it. i also think it would be really cool to 3D print a body for the pi unit that can house a decent sized rechargeable lithium ion battery, that could be recharged via micro usb or maybe type C. Another cool feature i thought of was if i could wire 6 usb ports to the rechargable battery that could be used to charge 5 bluetooth speakers and you phone in one go. i also suppose id need to put some kind of screen on the pi unit and program some kind of user interface so i could make pairing to the bluetooth speakers and smart devices easier. all in all i guess what im going for is a power bank with the ability to redirect bluetooth audio from a smartphone to multiple bluetooth speakers. is there anyone out there that could maybe help and suggest how to make such a device? constructive critism is welcome as are any ideas for extra features. also maybe point me in the right direction as to where i could purchase the parts for this?Parts i know i'll need5 bluetooth transmitters1 bluetooth receiver6 usb ports1 micro or type C port1 rechargeable lithium ion battery (preferably at least 10000 mah or more, more is always better)

Question by ZeroMonarch 1 day ago


Learning to crochet. Is it too hard? Answered

I always wanted to learn  to crochet. But I freak out because I think it's too hard and keep thinking that I can't learn it :( . So I need a total beginner's guide to crochet and please tell me it's not that hard! Can anyone please help? 

Question by Muhaiminah Faiz 6 years ago  |  last reply 1 day ago


Podra funcionar sin dañarse el amplificador o los bafles?

Es cierto lo que dicen que se puede instalar un bafle de 130 w con un amplificador de 90 w o 140 w, sin dañar los bafles o el amplificador?¿Cuál es la mejor instalación de bocinas (woofer, medio, tweeter), para una buena claridad y limpieza del sonido?Bafles se construye de acuerdo a si se usara para musica clasica o musica rock ?Al aire libre

Question by jtrujilloc 1 day ago


Help Mod a Dumb Car Screen

So I have my first car with a smart screen..This is a 2019 Subaru Forester with an insulting first screen..Anyone know how to hack the screen with my Puppy Pic..

Question by iceng 1 day ago


How do you remove or destroy a microchip in a dog? Answered

A friend has rescued a maltreated dog and does not want the cruel owner to get it back.Actually the dog has run away but if he(the rescuer)can find it he wants to prevent the chip from identifying the cruel owner.

Question by Cooper.123 9 years ago  |  last reply 2 days ago


How can I replace an original Helion veridict RC car servo motor with a cheaper one?

The servo motor on my Helion Veridict breaks often of some reasons. It seems that it can`t stand any bumps at all. I have got new servo motor twice from the manufacturer, but now they will not answer me. Can I change it with a cheaper one? And how do I do it? Any help will be appreciated.This is the car: http://www.rcdriver.com/review-helion-verdikt-elec...https://www.rctech.net/articles/review/full-review...

Question by Rabadash 5 months ago  |  last reply 2 days ago


how to make power by a hamster running on a wheel?

Running

Question by chaoxie 9 years ago  |  last reply 2 days ago


12v DC battery amp measurement? Answered

HI, I have a 12v dc battery and I wanted to measure the amps. Can anyone show me how to hook up the multimeter? Thanks

Question by amantux 7 years ago  |  last reply 2 days ago


Simple fishing lures?

Back in the day my grandfather use to make all sorts of artificial lures for us.From a simple spoon like thingy over spinners all the way to massive 300g killers to catch cod in the sea.And we always got our fair share of fish with them.These days everything is fancy, full of glitter and sometimes even with bluetooth and flashing lights.Are there any websites that show how to make the traditional ones yourself?I know how to make my own flies and have enough ideas for the rest but there must simpler ways then what comes to my mind..We even used wooden sticks with some aluminium foil around it and a small piece of lead for added weight to catch trout and redfin...

Question by Downunder35m 2 days ago


Add resistance to a led tail light?

I have a Led Tail light to wire to my motorcycle. I split my running light to light up my flashers also. My question is how can I make my tail light less bright? I off course think about putting a resistance, but how to choose the right one?here's my spec:12V motorcycle batteryLed light: 15 white LEDs2 flashers: 12 volts incandescent bulbsWiring: original running light split in two (1 in tail light and one to the back) then the second one split into the two flashersThank you all

Question by JimmyM95 4 days ago  |  last reply 2 days ago


CNC Electronics - Grounding and probe

Hello!Reading about proper grounding of cnc electronics I saw that ground has to be isolated from power supplies negative. So, I have a copper plate with ground cables from 48v, 12v and 5v power supplies with ground cable from the wall. Everything works fine but the machine itself, has no ground cable because if I attach the negative of my probe cable I will be connecting negative to ground... This morning touching the machine structure and the door handle (the door is metalic) I felt a light discharge. Should I connect the maching to ground? Can this affect in any way the electronics with that negative to ground? ( the discharge was lightly, I can live with that lol)The router has no ground cable, maybe that was the reason for the discharge.Thanks!!

Question by ryghar 2 days ago  |  last reply 2 days ago


DC MOTOR ROTATION problem with ARDUINO !!

Hey there ,i have a simple problem in my controlling motor with arduino project that i send 5v to it at the top of the code but many times it gives a very small incomplete rotation (a small step i mean ) and stops the code not allowing to complete it , if i give a hand help to rotate it rotates properly and some times without help . so how to make it rotate without hand help ? and what is the idea ? thanks .(i am using l293d)

Question by mohamedsaad194 2 days ago  |  last reply 2 days ago


i need help to make a video game can anyone help me?

Hi my name is arshya and i want to make a video game but i do not have the experience because i am 13 but i already have a idea i just want to see if it is possible to make it so if any one can help we can work as a team if its possible to make my idea, we can get it together than maybe we can split everything 50, 50. so if anyone is interested just email me at  arshyamohebpour8@gmail.com.

Question by arshyamohebpour 5 years ago  |  last reply 3 days ago


HOW TO ASK A GIRL OUT (FIRST TIME EVER)?

(FIRST TIME EVER)? OK we met at the start of term 2 last year at this little school we went there for term 2 we came friends and i no a little about her she is a year older then me i see her 4 for about 30 Min's in the morning on aw own when we met at the same station we hop on the same train we both get off at the same station then we get off and then she goes to her school and i go to mine i cant stop thinking of her no matter wats happening every tim i see her i get butterflies i have never told a girl that i have like them or ever asked some1 out in my hole life and im 14 and i have never been out with any one or kissed any 1 wat a boring life i have

Question by darcy cammo 10 years ago  |  last reply 3 days ago


How to bypass the Zscaler web proxy/filter? Answered

Ok so here are the details, I want to access sites like youtube, and well just youtube and I tried the https protocol and that didn't work and on top of that there's a bug installed within our computer especially designed to keep us away from changing any of the proxy settings in all of these browsers and I only have these 3 browsers: Firefox, Safari, and Google Chrome. If possible I would prefer Firefox because of the add-ons that I have with it. And i can't modify anything within the advance settings button on the Network/Internet Preference Pane. And as my last resort I ask all of you on how do I bypass this web filter? P.S. I have a mac mountain lion v10.8.4 Tank you very much for your support

Question by SkyRiseElite753 5 years ago  |  last reply 3 days ago


If I lost the remote control to an r/c car, can I use another one? or how can I fix it? Answered

Do I need to replace a transmitter and receiver? if so how? Any other suggestions are welcome.

Question by Kevvixx 9 years ago  |  last reply 3 days ago


Arduino Dying out!!

Hello, I bought an Arduino about a year ago, and just now I noticed that whenever I plugged it into my computer, it turns on(of course), but then it slowly dies out. Can anyone help me diagnose this problem? 

Question by vek11 5 years ago  |  last reply 3 days ago


dimensions for displacer on a Stirling engine? Answered

I want to make a low temperature Stirling engine. I was looking at some different designs for them and none really have a set dimension for the displacer. All the ones I see must just be guesswork. I  have a glass tube that I was going to use for the power cylinder about 16mm diameter I will build it like this. I have no idea what size the displacer cylinder and displacer will need to be for it to be effective. can anyone guess for me? I also need to know how much the piston should move for it to be effective. Thanks, David.

Question by David97 5 years ago  |  last reply 3 days ago


Help fitting a low voltage indicator into this circuit?

Hello,I know very little about circuits and electrical components, so please be kind.Attached is a picture of a simple circuit. "A" is a 4,5V AAA alkaline pack, "B" is a latching pushbutton switch and "C" is a nicrome wire.In the simplest and cheapest way possible, this circuit needs to alert the user if the battery pack goes below 3V. The indication signal needs to be a "beep", just like a 9V fire detector. (I can't have a LED signal).After some googling, I found that a 3V "low signal relay" could be one option. I prefer to use wires, and not a PCB in my circuit. My questions follow below:1. Is a low signal relay this the cheapest and simplest way, or are there others?2. What components do I need to achive the "beep" and where in the circuit do these components go?3. Will these components draw any power in standby mode, or do they only consume some power when the "beep" goes off? Because if they draw power continuously, I will need to add an extra (coin cell?) battery, as I need to save my alkaline pack for the nichrome wire. The extra battery shoud last for min 3 years.All help highly appreciated.Thanks!/Karolina

Question by karolina81 5 days ago  |  last reply 3 days ago


Question: I made a power pack of 18650s with protection board. Is voltage drop normal?

I made a power pack using 18650 batteries from an old laptop. All batteries tested individually are good. 4 batteries in 2S format. I used a cheap 2S 3Amp rated protection board I got on Ebay from China. I correctly connected all the terminals and properly soldered, B+/B- to the +/- of the final ends of battery and BM to the middle.The voltage measured directly at the battery terminals (at B+/B-) is 8.4 volts but at P+/P- (the input/output terminals of the board) it measures 7.5. Which means this board will not produce more than 7.5 volt usable voltage even when the batteries are fully charged to 8.4. Is that expected and normal? or is there a problem with the board.Thanks for help.

Question by ju1234 3 days ago  |  last reply 3 days ago


Is there a way to fix a binder ring that doesn't fully close? Answered

I think that we all have had to endure the annoyance of a ring on our binder that doesn't fully close. I am becoming quite impatient with the fact that every time I try to close my binder one of the rings is the slightest bit unclosed and my paper end getting very jumbled. PLEASE HELP!!!!                                

Question by happyjo 8 years ago  |  last reply 3 days ago


2003 Dodge Ram Pickup 1500 Radio not working

So, I have the OEM radio in it right now. Its a radio/cassette player. You can play a cassette and hear the audio just fine. But when you go to the radio, nothing. No sound at all. Not even static. And if I scan for stations, it'll just keep running, won't find anything. I pulled the radio out, made sure the antennae was connected, followed the wire as much as I could from the back of the radio to the antennae and didn't find/see any breaks/cuts. Any thoughts, suggestions, ideas? Thanks.

Question by Epicpoet 4 days ago  |  last reply 3 days ago


What is the difference between PVA glue and Elmers glue?

What is the difference between PVA glue and Elmers glue?

Question by threadbare 9 years ago  |  last reply 3 days ago


L293d and extrnal battery issue !!

My main problem here that i have a doubt that tinkercad can go someway wrong ! In this connection that i think is right , the l293d burns beacuse enable pin has higher voltage than powersupply pin or vc2 . But in conncection the 9v battery is with vc2 not the enable and the multimeter shows that , is there any thing can be wrong ?? (Enable is connected to arduino directly to send pwm values )

Question by mohamedsaad194 4 days ago  |  last reply 4 days ago


Electric Ukelele & Viola, Violin or Octave Violin Build

I am searching for inexpensive means to create aesthetically pleasing electric stringed instruments. I started this project when I started playing viola years after I was forced to quit private lessons. I discovered the F-f-fiddle on openfab.com which is a super rad 3d printed electric violin but since I do not have access to any 3D printer in the tiny town which I reside in, I sent the files to an online 3D printing business and they quoted me at least $500 just for the Fffiddle body! I didn't even bother to ask for a quote on the electric ukelele which I want to print & build so badly as well. I am interested in this project so that I can possibly help low income public school students in creating their own instruments to inspire them to take up an instrument and show them how much fun it can be to create something by yourself rather than buy. I am especially interested in acrylic plastic/lucite/celluloid, resins, exotic wood, recycled plastics, plastic injection molding, piezo pickups, and any other interesting materials that could be incorporated into these projects. I have been studying luthier tools, supplies, etc, along with design/fabrication of lucite/acrylic stringed instruments, furniture and other home goods. 3D printing/scanning, vintage celluloid guitar finishes, pre amps, recycling plastic bottles, landfill harmonic instruments, leather, pearl inlay, metallic finishes, enameling kilns, metal smithing, hand engraving & everything in between. I have been a mixed media artist for nearly my entire life and my father was a jeweler. I am going to find a way to create some functional and beautiful instruments no matter how long it takes me to narrow down the right combination of materials and how to make them, model them, mold them, dye them, etc! The photos attached are simply inspirational photos which I have collected over the past 6-8 months. Many of them are possibly patented, licensed, etc and I do NOT want to simply RIP OFF any of these photos! Please email me at svbacklund@gmail.com if you believe you could help me with my low income student instruments program or leads on 3d printing grants for public schools or anything else that may help me on my latest project or contact me directly via my instructables question here. I especially am interested in creating an electric violin which incorporates both classical and contemporary design. Any advice? Could you help?

Question by SVBacklunda 4 days ago  |  last reply 4 days ago


Controlling ws2815 from raspberry-need a little technical help

Hey guys! Im pretty new to this stuff. As part of an ambilight “project” im trying to use ws2815B with a raspberry pi3b+ I use a 12V 20A (meanwell) psu for the leds and an raspberry 5.1V 2A adapter(bought it because new rpi hated everything else!). So powering seems sufficient. 12V is stable. I already managed to get the lights working somewhat. Even video capture works “fine”, so the lights are okish and delay isnt “that bad”. However i managed to fry the gpio18 on the pi... I dont know what caused it for sure - but i found a broken 12V cable to the strip. Maybe that...or... My new rpi also keeps hanging a LOT when the leds are attached. I can still push buttons and try to restart with ctrlaltdel(which sometimes works sometimes doesnt) but completely hung(instantly loses network connection and only ctrlaltdel does anything), although colors still work on the strip as the video capture captures different image. So hyperion is running. First few leds are off or look like dead pixels. The Rest shows the right colors. Can this hanging and erratic behaviour be because of different logic levels? If so which logic level converter should i be using? Ws2815 is 12V but it works as mentioned above with 3.3v logic from rpi with some errors. If i bring it to 5v will it be enough? Or 12V logic level is needed? If logic level is not the issue, then what else? Thanks a lot for any input :)

Question by ferenc.lippai 4 days ago  |  last reply 4 days ago



Where can I get potassium ferrocyanide?

Potassium Ferrocyanide is a chemical that I can use to make Prussian Blue. I am currently looking for this so I can make some Prussian Blue or Laundry Blueing powder which I cannot find anywhere here. Prussian Blue will be used for making crystal tree's / forrest for my daughters. Anyone know where I can find it commonly or if I can do a synthesis of something else to extract it?  Is it used in pottery / ceramics ( this is the best source of my random chems )

Question by AtomRat 6 years ago  |  last reply 4 days ago


Question: does anyone know if there is an aluminum pipe expander over 6" in diameter

I would like to find a portable aluminum pipe expander a half inch over 6" for repairing aluminum irrigation pipe or any other ideas about how to repair them. thanks ron fancher

Question by flagman12 4 days ago  |  last reply 4 days ago


Advice on Brass wire soldering

Hi all :) I'm totally new to soldering and want to make a project involving soldering two pieces of 12 gauge brass wire using 20 gauge brass solder.My issue is the solder won't flow and the brass just darkens after a while of holding the torch to the metal.Here's the equipment I'm currently using:Solder: https://www.etsy.com/listing/291425439/brass-wire-... Silver - 38% Copper - 32% Zinc - 28% Tin - 2% Melt Point - 1200º F (650º C) Flow Point - 1330º F (721º C) Wire: https://www.etsy.com/listing/551472422/1-lb-round-...Solid Round Yellow Brass Wire. Metal : # 260 Yellow Brass. Melting point according to seller: 1650 to 1720º FTorch: Micro torch Roburn MT 770PFuel: Bernzomatic ButaneFlux: Oatey No.95Application: I clean and sand (using sandpaper and/or a file) the brass wire, and the solder. Apply flux liberally Apply heat using just in front of the inner cone (flame is totally blue with a slight hiss), starting on the sides of the wire and working my way to the joint.The metal glows but doesn't stay very much.Do I need a propane torch? What am I doing wrong?Thanks so much!

Question by Tooltip 11 days ago  |  last reply 5 days ago


Bottle stem holder

I have a lot of bottles i want to turn into differnt glasses. I liked tkhe idea of these stem holders but dont want to buy them. I'm thinking if using cutting and using the bottle bottoms so i need a way to attach them. Is there a food safe glue/epoxy to do this. Can i weld or melt the glass together. Yes, i can just buy the item buts thats not the point.

Question by danneauxs 6 days ago  |  last reply 5 days ago


I want to manufacture radiator coolant for vehicles. Pleae tell me the process.

In ur ans in yr 2010 u ve mentioned about the dye.. what kind of dye is requierd ?? 

Question by arcbits88 6 years ago  |  last reply 5 days ago


Dead Dremel help

I have a Dremel tool that is a few years old.  the other day it quit working, I was using it heavily.  I checked the brushes they looked fine.  I opened it up and everything looks OK the motor/ shaft are connected and spin. The  only thing I noticed was what looked like a thing strand of solider on the one side near the brush.  Any ideas?

Question by denkeeper 6 years ago  |  last reply 5 days ago


has any one cried in a dream and then woke up and had tears in real life.?

Like some one die in a dream  and cried and then woke and they were crying in real life.

Question by build52 8 years ago  |  last reply 5 days ago


How to convert a mini laptop (Netbook) with a broken screen to a workable instrument

Hi everyoneI have a Gigabyte Q1000C which recently fell and busted the monitor. The machine still works fine, other than the battery no longer charging. I would like to convert it into my "writing" machine (I write short stories as a hobby), almost like a typewriter with a screen.The main idea is to purchase a smaller second-hand LCD PC monitor and gutting it to fit into a custom built enclosure, I also need to be able to convert it to a direct-power sourced instrument, thereby bypassing the battery, which I have no clue how to accomplish, my electrical skills are dangerous at best.If there is anyone who could help me with the above-mentioned ideas, I'd be very grateful.The design ideas are either a retro feel, steampunk or cyberpunk vibe.

Question by FrancoisG2 8 days ago  |  last reply 5 days ago


How does one with no experience learn to work on and fix up cars? Where to start?

I am a girl and I have been interested in fixing cars for a while. Quite a few guys at my school seem to know how to fix cars up, but they had to start somewhere, right? Often, I think peoples' fathers help them out, but my own father knows nothing about cars, nor shows any interest in helping me. If anyone has tips on where I could start, perhaps I could find a shop where people would help me? Or do any car co-ops exist? I know there is such a place for bicycles where I live. Any tips would be great! I am enthusiastic and have some background with fixing bicycles and doing wood and metal projects, so I'm not mechanically clueless. I am mostly interested in old cars, but anything to start would be alright. I have browsed Craigslist for cars and found a few I could afford. On that note, I have a teen's level of funding, so I could find something, but tips on making the best of my money when going about fixing up an old car would also be appreciated (especially considering the cost for parts and such). Any tips on where and how to start are what I am looking fore. Thank you!

Question by toolgal29 8 years ago  |  last reply 5 days ago


Can I import a Blogspot Blog to create an instructable?

Can I import a BlogSpot Blog to create an instructable?I am currently writing a blog on googles BlogSpot about how I added more memory to one of my Arduino projects and compressed G-Code to save the plots on the EEPROM.I was thinking it may be a good instructable for those that write there own programs, and to entre it into the current Arduino contest.I haven't finished it yet: My BlogIt's quite long so an import would be better than copying and pasting

Question by Palingenesis 7 days ago  |  last reply 5 days ago


is their a repair manual for KIA Sportage for free?

Id like to try and repair my car myself for the crises nowadays is rampart if any body can give a site or whatever to help me avail this manual. this badly needed in my behalf thanks a lot

Question by jovenhatsjr 9 years ago  |  last reply 6 days ago


Melting Issue in LDPE Extrusion with Black Masterbatch

We're facing this situation with black masterbatch for LDPE in extrusion lamination process where some of the masterbatch granules are not properly melted and mixed with LDPE, which creates a lot of defects in the lamination. I've tried a number of Black masterbatch samples from different companies and in different prices and the problem still exists. Increasing the extruder temperatures doesn't seem to be helping either. This happens only with Black masterbatch and all other masterbatch colors melt and blend in with LDPE to give an uniform color strength. Appreciate your professional advice on preventing this issue..Thank you!

Question by hasitha.saveco 12 months ago  |  last reply 6 days ago


Use of diodes when connecting solar panels in parallel?

I have a bunch of 24 volt 270 watt solar panels.  Eventually I'll be putting three in series, then combining the strings in parallel, but for a temporary measure, I want to just connect two in parallel.  I've been in tv repair for over 40 years so electrical theory doesn't confuse me, but solar systems are a different story.  I've used four smaller panels to run a car radio display at an old car show swap meet for the last 12 years, and I just ran them in parallel, then into the charge controller.  Now I'm reading about blocking diodes, and I understand what they're for and that some people use 'em and some don't. My question is, physically, where do you stick them, and related to this, what is the purpose of using a combiner box?  Is the box just to provide a weatherproof place to make the connections?  Are they used to provide the place to stick the diodes?  I see they have circuit breakers inside, and it appears there's one for each panel, or string of panels, but I don't see the point.  If a panel can generate 10 amps, you'd want a breaker bigger than that so it doesn't trip at full output, but what could trip it then?  You can't get more than 10 amps even if there is a short. This should be common sense, but since I don't have a combiner box yet to look at, can I assume if it's made to combine four panels or strings of panels, you can connect just two or three and save the unused ones for adding on later? Thanks bunches; caradiodoc

Question by caradiodoc 4 years ago  |  last reply 7 days ago


How to connect 12v water pump to the 240v wall socket Answered

Hi there I really hope someone can help. I want to install a campervan tap setup in my office (tu cut a long story short, I need the sink and running water and the building is too old and no plumber will work there for little money) and got a 12v water pump which I indent do connect to a tap and feed from a 20L water tank.  This is the pump: http://www.trademe.co.nz/motors/boats-marine/parts-accessories/pumps-tanks/auction-1195429887.htm I got these details: Volts: 12V Nom. (9-14.4V) Amps: 3MAX (3.5A fuse required)  My question is: Can I hook it up to a 12V 5A power adapter to it and simply plug it to the wall? This is the adapter I found: https://www.aliexpress.com/item/Power-Adapter-Supply-For-Led-Flexible-Tape-Light-AC110-220V-to-DC12V-1A-2A-3A-4A/32658402593.html?spm=2114.13010608.0.0.k9Mw96 I really hope someone can help as I'm useless with this stuff 

Question by RacineO 2 years ago  |  last reply 7 days ago


Projects to use a bilge pump?

I have a 500 gph fully submersible rule bilge pump that is not needed for anything. I've been looking around and trying to find a use for it. I feel like the possibilities are endless yet I can't think of anything. It's a 12 volt 2.5 amp pump. Any ideas?

Question by Kirschbj 3 years ago  |  last reply 7 days ago


what shape is the most aesthetically pleasing composition to the human eye?

What shape is the most aesthetically pleasing composition to the human eye?

Question by 9 years ago  |  last reply 7 days ago


Cleaning an unknown metal object

My husband and I just moved into a new house on 5 acres. While cleaning some of the 'back' yard, I found a small metal coke/beer shaped-type bottle. It is obvious to me that it is a promotional or key chain fob or similar object. It looks like it screws together in the middle top to bottom. That is the crucks, it is frozen closed so the curiosity in me is trying to find how to unscrew the item. Any suggestions?

Question by ladynavyvet 8 days ago  |  last reply 7 days ago


Hoemade bike USB Charger not charging iPhone

Hi, I made a bike phone charger using a motor as a generator connected to a linear voltage regulator. The output current is stable at 5.05V and 1.1a (measured with a multimeter). Any USB device works, except iPhone and other Apple devices. It starts charging and 2 seconds later I get “This accessory may be not supported”Anyone knows what’s happening? Thanks.

Question by AdelCraft 8 days ago  |  last reply 7 days ago


Remote control pool heat pump

I want to interface a esp8266 to my pool heat pump, the heat pumps all show 3 and 2 wire access. But it's not clear if i just put 12vac via a relay on the pins or not? Also the 2 wire connect appears to be digital?Any advice would be appreciated.Ps.. I have already had success controlling the valve actuators with 24vac and of course the pump with 120v relay. Just need advice on the heater.

Question by JimO44 7 days ago  |  last reply 7 days ago


Soldering substitute? Answered

Is there anything that i can use instead of solder to bind electronics with? Im asking about solder itself, not the iron.

Question by PieMaster777 9 years ago  |  last reply 7 days ago


I accidentally poked small hole in freezer cooling line, can I patch it with flex seal or something like it?

Was de-icing my haier mini fridge, when I accidentally punctured a tiny hole in  freezer wall cooling line, it hissed for like 2 seconds. Is it safe to plug back in? and can I patch the hole?

Question by brandon.salinas.319 4 years ago  |  last reply 8 days ago


Question Re: Membership status

Hi does anyone know where to find out how many months membership I have left?I looked in various parts of the Web site but I cant seem to find it.I tried to download an Instructable today but the download button did nothing .I wonder if my membership and run out (although I would expect it to tell me !).Thanks in advanceSamBTW , it could just be a bug with the Instructable web site. Another issue is that I cant post a general question without choosing a Category or Channel which don't have a 'General Instructables Web Site' topic

Question by SammyPati 15 days ago  |  last reply 8 days ago