real time operating system ?

Is window  a real time operating system ? If answer is no then what is meaning of " window as real time operating system I don't understand what is meaning of window as real time operating system Is window ce is different thing ?

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


Operation Immortality

Operation Immortality is a project to collect and archive the very best of what humanity is and has accomplished. On October 12, 2008, Richard Garriott, famed video game designer and the first second generation American astronaut, will take digitized DNA and human accomplishments with him to store in outer space when he journeys to the International Space Station.The archive will include information on humanity's greatest achievements, messages from people all over the world, and DNA samples from some of our brightest minds and most accomplished athletes. During the month of September, every human being is invited to come to the OperationImmortality.com website to submit their suggestions for our greatest achievements and leave a message for the cosmos. A lucky few may also be selected to add their DNA to the mix and join Richard Garriott as he rockets out of the atmosphere.With the LHC ready to do its thing, I think this organization has surfaced at the right time, save the earth, before we might all die.To def.LINK

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


circuit diagram requst

I am making a life sized 'operation' game for a fund raising event. I am fine with construction and artwork, but need a circuit diagram for the electronics, can anyone help please? Doyou recall the kids operation game where you have to remove bones without causing the buzzer to sound or the red nose to flash? I want a circuit (battery powered) which when tripped by some one touching the probe against the metal edge will make the nose flash for about three seconds and also trip the buzzer to sound for about the same time. Any one know how to do this please?

Topic by batjonesy 10 years ago  |  last reply 3 years ago


Life Size Operation Game

I am making a life sized operation game for a fund raising event in my village. You know the kids game where you have to removed plastic bones from a flat cardboard patient without making the buzzer sound or making his nose flash? I am fine on making the game but am in need of help re the electronics. I want to make it so that if the person handling the tweezers closes the circuit the nose flashes for two or three seconds before swirching off, and also at the same time I want the buzzer to sound for two or three seconds before switching itself off. Can anyone please help re this? I need a circuit diagram that will do this. I intend to power the project with batteries. Thak You in advance. Jonesy

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


Operating systems(parody)

I thought I should start a parody of the battle of operating systems. With the new Windows 7 coming out what a great time to start! Here's my crack at it. Do you think it is good? Post your own here if you would like.

Topic by Chromatica 9 years ago  |  last reply 1 year ago


An operating system on an MP4?

Hiya! I'm Michael and I always have crazy ideas. This time I want to enter inside a MP4 player memory and modify it's boring menu into a cool thing where you have a white background and you have a cursor that you can move with arrows. Is that possible to edit its memory that way?

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


ARDUINO TIMING HELP?

Guys can you help me out with some code on arduino timing.I want my Arduino Due to perform a set operation(say blinking an LED) for user defined time ie. It should ask the user to enter the time he/she wishes to run the thing.Thanx..

Question by Lakshya1503 2 years ago  |  last reply 2 years ago


time safe circuit

I'd like to make a time locking box that is equivalent in function to this:    http://www.thekitchensafe.com/ I was wondering if there's anyone out there that would be willing to draw up a circuit for it as electronics is not something that I know how to do.  I could do it with arduino but I don't really want to tie up the board that way.  I assume it uses solenoids to operate.   I'm also open to any other ideas/advice people have.  .  

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


LED run time computation?

If a cell of 10 volts were to operate on a joule thief circuit on 2 1-watt LEDs. How long will that last?

Question by ZjY 2 years ago  |  last reply 2 years ago


intervalometer for servo or solenoid operation? (timed button presser) Answered

HI! I would like to create timelapses with a dslr i own. My camera has no ports for a remote shutter timer unfortunately so i need an alternative. I want to build a mechanical system to hit a shutter release every X seconds. ex: servo or solenoid. it seems like this should be fairly straight forward using an arduino or even maybe just a potentiometer i just cant quite seem to fit the puzzle pieces together to make it work. i am comfortable with soldering and am alright with arduino control so dont be afraid to get a little technical haha... just not toooo much...

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


Battery operated led with 6 hour run time per day.

Trying to figure out how to make a circuit for a LED light that is run by two AA or two C batteries. I would like the light when turned on to run for 6 hours and then turn off. Then autmatically turn on the same time each day and run for 6 hours without having to manually reset the light. Having a hard time trying to figure out how to make this timer. It would also be a bonus if the the led flickered like a candle. Thanks for any help in the right direction.

Topic by pdub0626 10 years ago  |  last reply 10 years ago


Need to operate a timer with a remote

I have a 6 Volt radio frequency remote control pair and a separate board with a 5 to 12 Volt timer circuit that turns power off to a load after 1 to 300 seconds. The timer circuit uses capacitors and resistors including a variable resistor plus a 555 too plus jumpers from Amazon.com to see a picture,it lists as: GEREE Timer Relay Switch 1-300 second 5V 9V 12v DC input TIME OVER RESET Delay. Will it work if I connect the RFRC to power and then from there wire to the timer and then wire the timer to my load so that I can remotely make the timer circuit  operate my load for the set time? I ask so as not to burn a thing that takes weeks to get. Will the 1 channel remote control receiver's single relay reset back into a NO condition from NC after current stops flowing from the battery power and through he remote control's 5 pin relay into the capacitor(s) of the timer circuit, that is to say, will the remote relay reset to NO after the timer's single relay goes back from NC to NO after the capacitor(s) run out of charge? As a note, I have had very little success finding a remote controlled timer in the 6 Volt range. 12 Volt remotes with timers are easier to find but that is too much power, size and expense for my application. Know of a supplier? If I have enough of this correct to make sense then any wisdom in this matter will be greatly appreciated. Thank you, Vince

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


masynmachien's time as an AIR

I had the honour and pleasure of spending the month of July 2013 as an Artist in Residence at Instructables HQ. An unforgettable experience! I feel like I cannot even begin to describe it, so forgive me for keeping it simple. The most tangible amazing thing is the unbelievable workshop, a true makers heaven! I mainly worked on the laser cutters and the 3D printers myself, but these are just a part of the new workshop set up at Pier 9. There’s also the experimental kitchen, the sowing corner, the electronics lab, the high-end CNC machines, a complete wood shop and a full blown metal shop. More importantly however was working among the people behind Instructables. To experience up close how they work very hard to make Instructables not only the biggest and best Show-and-Tell buy also the best “maker medium” ever. Having just moved to the new facilities at Pier 9, there was a lot of extra work to get the workshop accessible and operational, but they moved mountains to get us Artists in Residence onto the machines and making things. Working alongside three other Artists in Residence was also unique chance. Usually, when I’m surrounded by makers, most of them aren’t older than 12. But even as each of us had his inner kid very much alive, having some serious making going on around you is very inspiring (as some of my Instructables will show). I also very much appreciate how my daughter Tika was warmly received when see joined me at Instructables HQ. One month was far too short to spend with the people at Instructables HQ.  I was constantly torn between on the one hand getting to know the people better and on the other hand leaving them continue there hard work and trying to make as much things as possible myself. And to make it even harder there were the lures of the magnificent city of San Francisco and of the Bay Area. My conclusion is clear: I want to come back! But then, being a month away from home is not easy either. Tika joined me during the second half of my stay, which was great, but I missed my wife and youngest daughter. Back home in Belgium I’m first taking some rest, spending time with family and friends, working on some due home improvements and preparing some kids workshops. Writing up the Instructables on the projects I did will take some time. They will be published over the coming months. After all, I have about 15 new projects to document. The thread through my AIR was a laser cut (advent) calendar. A series of toy/gift assembly kits designed to be laser cut out of one acrylic sheet and to be wrapped into a cardboard package opening separately on each kit. The only parts added to the laser cut parts are some elastic bands, screws and nuts. The idea is to have a calendar that is easily made in several copies, with designs accommodating for thickness variations in the acrylic sheet and a concept of cutting and wrapping it all with little handwork. I managed to design, cut and test 13 different toys/gifts. I consider it the first chapter of a full advent calendar. I will make an Instructable on each of the 13 and put them in a collection, together with an Instructable on the calendar concept. The eye catcher of my stay was an iPhone/iPad (or Android) controlled RC Blimp with video feedback. For this I used the plug-and-play Dension WIRC system. This system leading to rather heavy build (200g) comparted to my other blimp projects, I decided upon using a large spherical balloon. From this (and from watching Doctor Who) sprung the idea to make it into a large eye. I named it ‘In the blimp of an eye”. The project that was the most of a learning experience was designing and 3D printing nested dolls. Deviating from the classic Russian dolls, I learned how to design these in 123D Design, how to calculate sizes and experienced the possibilities and limitations of different 3D printing techniques. I hope you will enjoy reading the resulting Instructables, just as I enjoyed doing these projects at Instructables HQ. I want to thank once more the people at Instructables and Autodesk for this wonderful opportunity. Thank you, thank you, thank you! Yvon Masyn aka masynmachien

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


How to calculate the total time a battery can operate light?

Hi,I am willing to just use solar panels to recharge my batteries and then to power my garden lights.  What I need is how do I know if my battery will be able to power my lights for atleast 24 hours.  How do I choose the solar panels to be able to charge the batteries. IF I know how to calculate for atleast one light and battery that should be enough for me to calculate for my whole system. Thanks

Question by Chamburn 5 years ago  |  last reply 13 days ago


Circuit for digital time control

In my design classroom project, my students want to build a 230V AC electric immersion heater (for heating water in a bucket) whose duration of heating the user should be able to set. The user should be able to set the ON duration by pressing up- and down- keys (operating 2 switches) to increase or decrease numbers that show on a dual 7-segment display (for showing 1-99). The numbers that show in the 7-segment display is the time in minutes the heater should stay on for and then switch itself off. Please guide me to a circuit that would do the above. All our induction cookers, washing machines, etc have this interface, I know this is not something new, but not being an electronics person I don't know where and with what terminology to look. Please help.

Question by ranjit_k 2 years ago  |  last reply 2 years ago


would it even be worth my time to make an ible that makes a yagi antenna have not seen a lot of radio lovers on ibles? Answered

I found a really cool way to make a yagi direction finding antenna but i have not seen much interest on the site about radio operations

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


"Massively Reduce Laser Etching Time"

The guys over at Redtorope.com have been addressing a way to reduce the cost of laser etched/cut projects when having a job done or reduce the wear and tear on one you or your company owns. It's not really a hack or a hardware fix, just an exercise in thinking within the operating parameters of the machine. Really well done and explained in such a way that others will be able to apply to their own projects. Well done fellas!  http://www.redtorope.com/2010/11/massively-reduce-laser-etching-time/

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


Sunday mentoring session was the best time I've had in a LONG time.....

I had wanted to post this yesterday,  and I had it ALL written out but just before I wanted to hit enter, I had to back space to fix a misspelling and the whole browser backed up and wiped it ALL out. *sigh* Anyways, this past Sunday, after meeting, my wife and I were invited to stay and do some things with the children and the parents of that particular household. This is the family with the Asperger's child of 8 that built the Scorpion model/puzzle with me (see instructable for details on that build). I had sooo much planned, but we didn't get to half of it.  Which is ok, more to do another day.  I fixed her robot (last time the ground wire had broken off the motor, this time it was the red wire) by soldering the loose wire back on.  The battery compartment was broken too, so the one end of the "box" that joined the positive and negative terminals of the two batteries, was completely off. Thankfully, I had brought my hot glue gun. A more permanant fix would need to be done later if this didn't hold.  Anyway, I demonstrated the Magus effect to her, first showing her a ball rolling off a flat piece of cardboard, then asked her what she expected the paper tube to do when I rolled IT off the plane. She wasn't sure but after a bit of prodding she said it would act like the ball, only slower.  When she saw the tube roll of and reverse direction she had to see it again (to make sure I hadn't done something TO the tube :-)   THEN she just HAD to show the rest of the family   :-) The hardest part was explaing the effect to an 8 year old.  She is smart, but not very advanced language-wise. So I had to keep it fairly simple. STILL the experience was great. When I made a "voice box" out of a drinking straw and a balloon, though, she was tickled pink. She just HAD to have one, despite the great difficulty in operating it. I promised to think more on how to make it easier to use by the next session.  All in all, my head was spinning, and I was giddy all the way through Monday from the encounter.  I do think I missed my calling in life....

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


Time Travel Contest (with actual prizes!)

Fancy winning a few goodies?From the New Scientist magazine:Our theme this year is time travel. When the Large Hadron Collider at CERN was about to go into operation, some physicists speculated that it might attract visitors from the future (New Scientist, 9 February, p 32, and Feedback, 5 April ). For our competition, we ask you to imagine three such visitors arriving, each bringing glad tidings and bearing a gift from the future. What would the gifts be?Ten lucky winners will each receive a copy of Physics of the Impossible: A Scientific Exploration of the World of Phasers, Force Fields, Teleportation and Time Travel by Michio Kaku. They will also receive a selection of New Scientist goodies - including books from the Last Word series and a pen-drive.You may enter the competition online. You can also enter by email - with "Competition" in the subject field, please - or by fax or post.The competition closes on Monday 1 December {a significant date} and no entries will be accepted after that date. The results will be published in the 20/27 December issue of New Scientist. The editor's decision is final. Happy imaginings!

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


CCFL tubes...what is the range of power they operate in ?

I see write-ups aplenty of how to fix screen backlights and re-using CCFLs from scanners and such, and ALL say 'beware high voltage !'. NONE, however, specify what those voltages/currents/frequencies may actually BE ???! Several times I have been offered LCD monitors with obvious backlight problems and have only gotten one to work by replacing bad caps. This all makes me wonder - could it be that the ballast from a dead, smallish CFL might power a CCFL quite nicely - does anyone know ?! Thanks for any replies ! PS: Please, no lectures about the dangers of high voltages and so forth, this question is being asked by an adult who is safety conscious.

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


Two DPDT switches with timing for one motor Answered

Hi, I have a motor (12V DC) that I need to be able to operate both backwards and forwards from two locations. The simple way is to connect it with two DPDT switches with momentary on in each end and off in the middle, i.e. also called (on)-off-(on). The reason for using momentary switches is that there would otherwise be a risk of short circuiting if one of the switches are left in on-position. However, I almost always need the motor to go to preset limits in both directions which takes a couple of minutes (the limits are built-in functions in the motor, so no need to set those). So I was wondering if there was a cheap and easy way of inserting a kind of timer or similar that would only leave the connection on for a couple of minutes only (and yes, there would still be a risk of short circuiting within those two minutes, but it would be unlikely to happen)? Or perhaps there is an even simpler way of doing it? Any ideas would be welcome. In (the likely) case the above is not clear, perhaps this will help: I need it to operate a curtain, i.e. moving the curtain up and down, but I need to be able to do that from two different locations. Preferably it would be good if I could also stop the engine somewhere in the middle - as I would be able to do with a switch simply be releasing it. The best/cheapest/easiest way would, I think, be to have two DPDT switches with a spring or something with a couple of minutes delay, i.e. if it is left in the on-position for more than two minutes it would automatically spring back. But such a thing seems not to exist... or? Would be grateful for any inputs. Erik

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


Solar operated timer - NEED Help Please...

Hello everyone!I need help!I have an idea of a product I'm designing to get accepted to a design school.I need help since I have very little knowledge in electronics.I need a circuit for a timer... an egg timer with a twist (I think)Should have a switch (click type), 1 Buzzer, 6 indicator LEDs, and I take it that some kind of Controller (I have no idea what kind) and should work with solar power.Should work as follows:You press the switch once - one LED is lit and the timer count back 10min. and then the buzzer will go off. press it twice - 2 LEDs are lit and it will count back 20min till the buzzer goes off... and so on up to 60min.If 6 LEDs are too much for Solar power, 3 are also OK (30 min timer) or NO LEDs, but a "beep" indication for each press / 10min. time.I hope it's possibleAnd thank you all for your HELP!!!Take a look at the attached picture... Just to get a laughET

Topic by etgalim 12 years ago  |  last reply 10 years ago


converting lighting fixture to portable battery operated

Ok I've done many searches but do to this being a bit unique I haven't found a solution thats spot on. So here's the story!  I found this cool bathroom, above the sink, multi bulb lighting fixture by the trash. (Oh like you don't shop the same places? He he) I really want steampunk looking lighting for a convention booth I am setting up in march. Tricky part is no power. So, I grabbed the fixture, blasted with a base coat of paint and am posting here for guidance on making this battery operated. Anything is possible I know but in this case I would like a few requirements to be met 1. I'm a maker, and a broke one at that, I don't want to spend $250 on a battery go anywhere plug in device ...its expensive plus if I can make my own I'm happier, mmo cheaper I'm even more happy, mmo with more "found" parts I'm even more happiest! ;-p  2. I'm a lil thing, 90lb soaking wet... I had to hump 120 pound packs w heavy radios back in my USMC days, however I'm not in the corps so I don't want to pack a 120 pound battery thru a convention center for my Lil display. Light as possible battery solution for my light please!;-p 3. I can't use solar at this location, I do have limited space and finally 4. If possible I'm trying to keep this looking nice. This is for my display table. The broke part...I need to make money and that means slick looking booth that people will be drawn towards, handing over their hard earned money for amazing well lit steampunk treasure. I love duct tape, even mentioned it on my dating profile...but it doesn't scream style. Just saying ;-p I'm not surrounded by fellow makers or tools so me chatting ideas out with friends and fine tools isn't happening...so I'm here i n hopes my fellow interweb maker family can help me out here. I have basic electrical knowledge, basic tools, color blind but I think were OK with these few colors here. I took photos to assist the visual and stir creative juices.  Mahalo for taking time to read and inspire! 

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


Pretend to be a Time Traveler Day - Dec. 8

This sounds like loads of fun: Pretend to be a Time Traveler Day!Scheduled for December 8, 2007. Just spend the entire day in costume and character, but don't actually explain what you're doing- context, costuming, and behavior are key! Never admit you're a time traveler, and make really, really bad attempts at keeping a low profile.Three options:1) Utopian/cliche future- "If the Future did a documentary of the last fifty years, this is how badly the reenactors would dress." Think Star Trek: TNG or the Time Travelers from Hob. Ever see how the society in Futurama sees the 20th century? Run with it. Your job is to dress with moderately anachronistic clothing and speak in slang from varying decades. Here are some good starters:- Greet people by referring to things that don't yet exist or haven't existed for a long time. Example: "Have you penetrated the atmosphere lately?" "What spectrum will today's broadcast be in?" and "Your king must be a kindly soul!"- Show extreme ignorance in operating regular technology. Pay phones should be a complete mystery (try placing the receiver in odd places). Chuckle knowingly at cell phones. 2) Dystopian Future:- This one offers a little more flexibility. It can be any kind of future from Terminator to Freejack. The important thing to remember is dress like a crazy person with armor. Black spray painted football pads, high tech visors, torn up trenchcoats and maybe even some dirt here or there. Remember, dystopian future travelers are very startled that they've gone back in time. Some starters:- If you go the "prisoner who's escaped the future" try shaving your head and putting a barcode on the back of your neck. Then stagger around and stare at the sky, as if you've never seen it before.- Walk up to random people and say "WHAT YEAR IS THIS?" and when they tell you, get quiet and then say "Then there's still time!" and run off.- Stand in front of a statue (any statue, really), fall to your knees, and yell "NOOOOOOOOO"- Stare at newspaper headlines and look astonished.- Take some trinket with you (it can be anything really), hand it to some stranger, along with a phone number and say "In thirty years dial this number. You'll know what to do after that." Then slip away. 3) The Past:- This one is more for beginners. Basically dress in period clothing (preferably Victorian era) and stagger around amazed at everything. Since the culture's set in place already, you have more of a template to work off of. Some pointers:- Airplanes are terrifying. Also, carry on conversations with televisions for a while.- Discover and become obsessed with one trivial aspect of technology, like automatic grocery doors. Stay there for hours playing with it.- Be generally terrified of people who are dressed immodestly compared to your era. Tattoos and shorts on women are especially scary.

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


How accurate do VGA timing signals have to be?

I'm looking to try to drive a VGA monitor using a PIC 16F690, on a 12MHz clock (3,000,000 operations per second) The most accurate the signal from the PIC can be is 1/3 uS, but the timings given are to 1/100 uS for the 640 X 480 @ 60Hz standard. Overall, each frame does come out to a whole number of cycles, so does the exact duration of each line matter? I've seen a PIC output very basic graphics on a 4MHz clock, so I would expect it to be fairly simple to just light up the display on 12MHz. Alternatively, is the display smart enough to fit whatever is fed into it onto the screen? Thanks for the help.

Question by The Skinnerz 7 years ago


I want to operate 3 different LED's using single push button?

I mean when i'll press the button, 1st LED should glow and it should be turn off after few second... and when i'll press this button for 2nd time, only 2nd LED should glow and it should be turn off like 1st .when i'll press this button for 3rd time, only 3rd LED should glow and it should be turn off . what to do??? can anyone help me?

Question by thered4321 3 years ago  |  last reply 3 years ago


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 4 months ago


how to install permanent air jacks on each tire side operated by 12v compresor system to lift car and change a tire.?

The idea is to install pneumatic jack on each tire. to lift the car when a flat tire occurs. one side at time, the system need to include security system to avoid unintentional or accidental operation when the car is moving. also the system could be hydraulic operated by 12 volts pump

Question by 10 years ago  |  last reply 8 years ago


Operate a 12v/6Amps air pump, with DIY battery pack? Answered

Hello guys... I have an electric air pump and i want to operate it with a battery pack (for camping purposes, away from any kind of electricity source). Its a 12V/72W pump (works with car lighter connector) so by my poor calculations, i need something that can give me 6Amps for at least 5-10 minutes. I have a lot of 18650 batteries in my disposal, so i thought that i maybe can put together a portable battery pack, so when i go camping for example i can carry it with me. My circuits design skills are... nonexistent... My DIY skills are reasonable... so my questions are: 1) Is it possible to create something that can provide at least 5-10 minutes operation, once per every charge? 2) If yes... can you please tell me or point me at the right direction so i can accurately calculate the amount of batteries that i need and the proper way to connect them? 3) or... any other easier "portable" solution? for example something lighter and cheaper than a motorcycle battery...? Thank you for your time! :)

Question by the_phantom_boy 3 years ago  |  last reply 9 months ago


Self Opening Clip with time delay of 2-3 mins

Hi All This is my first post, so I apologise in advance if I've selected the wrong category for the post. I have an idea... I have a quad-copter at home that I'd like to attach a small light weight item and have it self release/open after 2-3mins. Ideally, either a small springloaded clip based on the rough image below or something similar, that is self opening after a selected timeframe, even after 1-2mins, or alternatively, a small lightweight mechanism that does the same thing. I've searched everywhere and can't find anything even close; lots of small clips, hook, latches, but nothing that 'self-opens', which is the most important spec. I can add a new RC servo and swinging arm and operate the release by remote, but I want to avoid it if there's a simple solution out there. Appreciate any help if someone has seen something out there?

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


I want to find CNC laser machine operation manuals, can anyone help me?

I just got hired, and Im a 3-axis laser cutting operator working with two 5Kw machines (5Kw = 1,000,000 times your average large laser pointer) one is a NTC TLV-714 D and the other is a NTC TLZ-510. If it is at all possible that someone could scrounge up an english copy of operating manuals in English (ones that detail how do do things, like button sequences and beam codes) for one or both of these, i would be extremely grateful.

Question by The Ideanator 8 years ago  |  last reply 8 years ago


Finding authors who like to share and co-operate with their instructables

This is Kalimov. I am now working in an education company called Shanghai Genius Education Technology Co. Ltd. that mainly deals with schools in China. I am also a maker, too. For several years, I've read about instructables on instructables.com and many of them were quite amazing, both in techniques or ideas. I think why not introduce them to kids in schools of China? I've asked the staff commitee about my idea and now I'm sharing this idea to you. Below is my thinking. My company wants to introduce some overseas instructables to schools in Shanghai or other cities in China. We also want to publish books of tutorial compilation. We are willing to translate English to Chinese. We like to share the backstories of a making and autobiography of you. What we need is your permission that you like to share or write out how much benefit you want (PM).  Summary: In the book and the app we are going to publish, there are introduction of instructables.com, your profile and tutorials, your backstories. We share the benefit from education market. All sales reports are going to be visible to everyone. Besides, I also collect some of my crafting these years and I have made a post here. https://www.instructables.com/id/Some-Pictures-of-Crafting-I-Made-These-Years/. Thanks to Mike Asarus, Liquid Wash Hand and many members in instructables.com that they keep inspiring DIYers all the time!

Topic by Kalimov Lok 1 year ago  |  last reply 1 year ago


Battery Powered LED Strip

Hi, I have one 6V Alkaline Battery (or two 3V Coin cell battery) that i am using to light a fairy LED strip (see here). I'd like to know for how long the battery will last me for. Can you please direct me what parameters I need to collect for the battery (or the LEDs) and what equations i will be using to determine the operating time of the battery. Thank you for your support in advance, Regards,

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


Wireless Battery Operated Water Tank Overflow Alarm or Transmitter

In India and worldwide water, availability is a huge issue so saving water is most important work these days for the environment. As like most of the Indian families using water tank to store water and use them later. The main issue is that wastage of water once water tank got filled and most of the water tank fixed on the rooftop. There are lots of devices available in the market to warn overflow tank but most of comes with bulky wires and connection to show the water level or water overflow warning. But I want to make a simple battery operate design/circuit for a water tank that transmits water overflow signal every 8 or 10 seconds to the receiver. For the signal receiver, there is no issue of power but for transmitter power, an important factor and this is must that transmitter circuit works on battery for a long time. So Here I want to design a circuit works on battery (3v to 5v). A circuit with two wire fix at the top of the water tank or on the sidewall and circuit check wires connection for water touch them every 8 to 10 sec. If water touched the wire transmitter release a signal (go to sleep mode again for next 10 sec) to the receiver and receiver worn by a small buzzer for 10 sec. Again after 10 sec transmitter check the water level and release a signal to the receiver. Similar water tank alarms comes costly around 90$ to 150$. I want to use AtTiny85 or min Arduino, Wireless module 433mhz to save money. So please help me start this project by programming or another way to finalize this project and help me save water.

Question by sandeeprhce5 1 year ago  |  last reply 1 year ago


220V 1000times a second transistor/relay?

I need a transistor/relay that can operate under 220V and can open and close itself a 1000 times a second. Does such a thing exist?

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


Timed Arduino, Solar Panel, Battery & 12V Pump HELP

Hi all, I'm a struggling to do a project in less than 1 week for a charity and wondering if the www can help. I'm a complete electronics/Arduino beginner so please break any suggestions down, thanks! The challenge: I need a little water pump to run for 3 seconds with a 10 minute pause completely off the grid 24/7 from a battery. I need the battery to be charged using a solar panel and hold enough storage to run 2 days without sunlight. An Arduino is also needed to change the duration and interval of the pump. What I know: The pump requires ~12v @ ~270mA (5W) and 64.8mAH (for 2 days of operation) (pump runs for 18s per hour = 0.05h per hour 0.05h x 270mA = 1.35mAH 1.35 x 48hrs = 64.8mAH) I also need to be able to take the battery on a flight so please recommend a suitable battery for the system (I was thinking maybe the Li-ion 18650? http://www.ebay.co.uk/itm/311727421481?_trksid=p2060353.m2749.l2649&ssPageName;=STRK:MEBIDX:IT). Pump: http://www.ebay.co.uk/itm/222223864810?_trksid=p2060353.m2749.l2649&ssPageName;=STRK:MEBIDX:IT What is the simplest way to wire & code everything up? (Please also recommend any required components) Any help is much appreciated!

Topic by nikian.aghababaie 2 years ago  |  last reply 2 years ago


Build a small solar powered, battery operated LED bedside light?

Firstly, I am a mom of boys, who want to build their own stuff. I am a nurse/midwife, so very knowledgable about many things. Electronics is not one of them! But I'm willing to learn and find help for them. the store I will be using is www.rabtron.co.za as we are in South Africa.  This is the light my son wants to use for this project. http://shop.rabtron.co.za/catalog/module-samsung-5630-chip-leds-plastic-white-p-6957.html He will need about 4m of wiring to run it to the solar panel just outside his room.  What would be the best components for him to use, - rechargeable battery, solar panel, switch, and any extras that I don't know that I need.  Also, if he does not use solar power, what battery configuration would work best? Thank you for taking the time to help us. We hope to be tackling many projects in the future. 

Question by BW7 3 years ago  |  last reply 3 years ago


Voltage question - 4 battery operated soap dispenser to AC powered awesomeness

Alright, so first time post here, I have been interested in converting my automatic soap dispenser from DC power to AC power using an old 5V cellphone charger. Last night I did the deed, actually really simple, I followed the general idea of this instructible, though my mod didn't include a double pole double through switch, I just took the batteries out and connected the AC charger's wires directly to the battery terminals. Here's my question though: While it works, its not quite as powerful as I though it would be, its actually a little weaker than it used to be when I had batteries with a fresh charge. It originally had 4 batteries, so I used a 5V charger. I have another charger setting around, but its a 7V, do you guys think thats too much of a jump? Should I wait till I can find a 6V charger? Am I going about this the wrong way? I really don't know anything about voltage, but the concept of converting this stationary item to AC seemed like a good idea and I'll really enjoy not having to replace the batteries all the time. Thanks for any help!

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


EMERGENCY LIGHT circuit

>i want a design of an EMERGENCY LIGHT circuit pcb> >i want it to run two 61 cm 20W florescent tube lamps> >the circuit should have a key to turn on or of and a key to operate one or two lamps> >u may use one key as u like , operation time on battery is 3 hours as minimum .> >i may buy the design after testing it .

Topic by spyman114 8 years ago  |  last reply 8 years ago


What kind of switch to operate and bypass motion sensor security light?

I would like to be able to manually operate the light for when I need it to stay on continuously, and then have it operate on the motion sensor when I am away from it. Basically I have a motion sensor light mounted above the entrance to my shed/ workshop, and sometimes I need to set up my sawhorses outside of the shop to do work at night and the light is sufficient, but when I have been still too long, perhaps doing some figuring or whatever, it goes out. I don't want to have to continue to wave my hands about to get it to come on every time it goes off. Do I need a double pole single throw switch, or a single pole double throw, or what(is a three way light switch a SPDT- [single pole double throw] switch)? Is there a way to wire it to a single switch where I could flip it over to one side to operate continuously, and then flip the switch to make the light work off of the motion sensor when I have gone in for the night? Please forgive the ignorance. I just can't envision it in my head. Thanks.

Question by stevecinstrfme 4 years ago  |  last reply 2 years ago


This week the highly anticipated High Line Park in NYC opened to the public for the first time.

This week the highly anticipated High Line Park in NYC opened to the public for the first time. The park was built on the remains of an abandoned rail system in New York City. Check out our video of the new High Line, with exclusive interviews with the design team including Lead Designer and Landscape Architect James Corner of James Corner Field Operations and architect Ricardo Scofidio of Diller Scofidio + Renfro who made this stunning new park possible. http://www.youtube.com/watch?v=DIerTFnRiR4

Topic by YourSolarLink 9 years ago  |  last reply 9 years ago


Help! Magnetron in microwave oven makes jackhammer noise.

My microwave oven was out of order, it kept blowing up the power fuse; finally the trouble was traced to the power capacitor that was shorted. So, the power capacity was changed and the oven worked again, but now the magnetron becomes noisy with a jackhammer noise when it is working. This noise starts when the magnetron starts working, but it stops after some two minutes while it continues to work up to the time adjusted for it to finish its operation. What has happened to the magnetron? Is it possible to fix it? On the other hand, it is my best suspicion that it is the magnetron that is making the noise and not the transformer. What is your experience in this situation? This is exactly the sound (click on the link below) I am getting from my microwave oven, but it does not go and on until the machine turns off; the sound stops some two minutes into the operation, and the remaining time there is no longer the sound or noise – for the remaining time it keeps ‘quiet’ up to the completion of the time period it has been adjusted to operate, or I turn the switch knob to off. https://www.youtube.com/watch?v=CF0RXKF4puQ Thanks for any help or information.

Topic by Marius de Jess 4 years ago  |  last reply 4 years ago


DIY about wiring a garbage disposal? Answered

I have a situation in which I have a receptacle under the kitchen sink that my dishwasher is plugged into.  This receptacle is then operated by a switch on the backsplash on top of kitchen counter.  We leave the switch in the on position so that we do not have to flip the switch each time we want to operate our dishwasher.  I now want to install a garbage disposal and place a switch under the sink.  I would like to come off of the receptacle described above. Could someone inform me how to connect to the receptacle so that the switch will operate but not interfere with leaving the switch on at the backsplash.  Any assistance will be greatly appreciated.

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


Sewing Machine Retrofit

Just ran across this blog post by someone who has altered his sewing machine for significantly improved performance, and several modes of operation. I particularly love the mode where the needle follows the pedal, up, or down.  You basically make one stitch at at time each time you press the foot pedal.  Want!

Topic by rachel 9 years ago  |  last reply 9 years ago


how general os scheduling is different from rtos scheduling ?

Scheduling for rtos and general operating system scheduling for rtos - rtos use time sharing architecture where each task assigned small slice of time to execute its instruction before switching to another task how general os scheduling is different from rtos scheduling ?

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


How exactly to link a hardware to a software? Answered

I've seen it so many times in robots computers etc, i wanted to know which software does that job? rather how to operate a hardware using codes?

Question by ankur2893 7 years ago  |  last reply 7 years ago


Hi Guy's Im looking to build a Led controller that can operate a12v 600 leds in 4 channels 200wh 100red 100blue?

Each channel has two on times and two off times in a 24hr period.Each event ie; morning, can have 4 ramp times ie:red led channel comes on and rises red channel starting0% led power up to say 85% over a one hour period meanwhile the white channel comes on say 20 mins in to event and rises led up 0% to 100% over the hour and red led will fade out.This giving the effect of sunrise. There will be different light for different times of day.For the night the blue channel will fade in simulating the moon.There can be up to 256 stages of color.So a need a system controller that can control Both the time that a channel is turned on/off and the level of power that is put to that particular led channel. This project is for my aquarium.The idea is to be able to simulate daylight for the the fish that doesn't have a florescent light flashing on make fish jump. Sorry for the long explanation.I,m a electronic dunce sorry guys.Any help or advise would be very much appreciated Regards Jon

Question by 10 years ago  |  last reply 9 years ago


Questions are Not Deleted

A couple of times, I have tried to delete a question, and I will find out later that somebody had replied to it (and it will still appear in the QA section).  My operating system is Windows 7, browser is Firefox (I think it is the second latest version; I am not positive).  Thank you!

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


Running a single DC motor for a specific amount of time using Arduino Uno.? Answered

This will be my first experience with arduino or any  micro controller as well as my first dip into android app development. I need to run a single bi-directional DC motor in one direction for a set amount of time, say 10 sec, and then later run it in the reverse direction for the same amount of time. The time between these operations will average a couple of hours. The command will be sent from an Android app via Bluetooth to the Uno. I don't need variable speeds, just the ability to set the run-time duration and direction. Also the run-time will be set once and stay the same, it does not vary. I assume I can develop an app that sends some sort of command (C1) to the arduino and when the arduino receives C1 it can turn the motor on for a set amount of time in direction 1 then turn it off. Similarly when the app sends a new command, C2, the arduino then could run the motor in direction 2 for a set amount of time. Is this assumption correct? What sort of commands would the app have to send to make this happen? Is there an easier way (run-time set in app not arduino code for example)? I also assume I can use one of the simple motor control circuits here on instructables with this setup. Yes or no? Sorry if these are incredibly simple questions and thanks for helping a Arduino virgin out.

Question by bwrussell 7 years ago  |  last reply 2 years ago


Switch Timer

Good day, Please i have 2 bulbs/leds, one is green and the other is red. I want to put a time switch between them so that after 10 minutes the red switch off and the green lights up and vice versa till i switch it off. So do you know of any switch that i can use for that purpose, that will operate under 12v, like 5v. Please thanks

Topic by Don Amada 4 years ago  |  last reply 4 years ago