License question... Answered

I am currently in the finnishing stages of a new aluminium print nozzle for 3D printers. Of course I would like to share my project here soon but I also would like to see if it has any commercial value. I would only be able to make a very small amount of them each month and the hours I have to spend in my workshop for it would not be justified by any price. So if someone would have an interest to mass produce this nozzle what would be the correct type of license to choose from when publishing the Instructable?

Question by Downunder35m   |  last reply

Why is MIT license not offered among the available licenses on Instructables?

Hi folks, why is MIT license not listed in the available licenses for instructables? It seems to be a very popular license for open source software development projects, I found a modified version which covers hardware as well.. Any specific reason why it's not available? What's the most popular license around here? Thanks and Regards, Stefan

Question by systdist   |  last reply

Why do you need to choose a license every time you publish an instructable?

I don't get why do you need a license. I just choose GPL (General Public License).

Question by firtvid20   |  last reply

In the uk can you legally own a vehicle if your under 18? Answered

If you do not intend on driving it Just keeping it Its a small road legal 49 cc Trike for info

Question by stephenniall   |  last reply

vista to xp upgrade without piracy ?

Mom is going to buy a new thinkpad soon. it comes with vista home basic - probably oem licensed is there way to change the vista to licensed xp without paying for that ? (question is how to make it licensed and not just download and install xp)

Question by 11010010110   |  last reply

What is the easiest way to remove DRM licenses from downloaded iTunes 9 music? Answered

I want to remove the DRM licenses from all my download iTunes music. What is the easiest (free) method of doing so? Thanks! -Shadow Ops

Question by Arbitror   |  last reply

Can I make these projects to sell?

I want to offer an instructable building service (through the instructables forum) for people who want a project but can't build it. I am going to have a list of projects that I am comfortable building and will build for people. These are the instructables I am going to start with: Can someone tell me which of these I can use. Also how to tell on any instructable whether or not I can use it. Also if anybody has any other sugestion for this endeavour I would apreciate it. Thanks

Question by nurdee1   |  last reply

How do I publish an Instructable and can make sure my work is not stolen for commercial products? Answered

Background: A nice member noticed an induction heater "kit" on Ebay and commented about it. After a lot of digging I found some pictures and technical details on the web - Google translate might be funny at times but was a real help for my bad chinese skills... Turned out the shematics for this heater are identical to my design. Sure they use a different mosfets and and create a nice looking circuit board for all but it does not change the fact that my design drives it. One chinese wholeseller is selling them in 500pcs bulk. Current problem: I am working on the next generation of my induction heater based on an induction cooktop. Since the power levels are much higher and more option possible I think it will be a great project loved by a lot of people. But I feel reluctant to publish it in a detailed form that can be used by everyone to re-create it as I fear it will end up on Ebay as well. So far I can't even estimate how much profit some chinese guy is making while laughing at me and for obvious reasons I would like to prevent that from happening to 2.0 as well... Is there any way to protect my designs or to get hands on the chinaman to strangle some money back out of him?

Question by Downunder35m   |  last reply

Automated License Plate Recognition - Good ? Bad ? Indifferent?

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

Topic by Goodhart   |  last reply

What steps should I follow to obtain an FM license from the FCC? Answered

A friend suggested to apply for an FM license to broadcast from a home operated radio station. I could fill a needed niche but I don't know how much money I need and what steps should I follow to make everything legit.

Question by blkhawk   |  last reply

I have a scrolling led license plate frame. What do i need to do in order to be able to hook it up to my pc via usb?

 I'd like to be able to mod the sign so that i can hook it up to my pc and program messages into rather than using the painstakingly slow remote it came with. Thanks.

Question by spacegravity4me   |  last reply

Can anyone teach me how to make a remote control plate flipper for my license/vehicle registration plate for a car show?

I have a car contest coming up in Indonesia and we have a choice to remove our plates to protect our identities on the streets from show visitors. It usually takes a small amount of effort to remove the plate screws and fix on the contest user name but I thought it would be nice to have it automatically change when I enter the show (might help me gain more points :D) I have tried to search for this item online but some only supply the item to Russia and the rest of the sellers are in China. They cost around 290 dollars for a set, which I thought was quite pricy. To be quite honest in that 290 dollars I was going to spend, I doubted that the China factory would use the best quality materials considering the price. So I was wondering if anyone could help me make one of these automatic revolving plate frames with remote control operation for the auto show? It would be really great as it would help me gain more points! These are the links of the Russian company and Chinese company that produces it: 1.       They have videos (Russia) 2.               They don't have videos (China) Thank you all for you help!!!

Question by 1N5TRUCT4BL3S   |  last reply

what do the numbers on the bottom of a california drivers license mean?

On the bottom of a california drivers license they have numbers . i know one is the date is was issued then there are more what do they mean

Question by    |  last reply

Transfer my Licensed Google Sketch Up Pro from my Pc Desktop to my Pc laptop ?

 Can it be done? It would go from XP to 7.

Question by Chromatica   |  last reply

FM Broadcasting Answered

What is the max power voltage for FM broadcasting without a license

Question by wenpherd   |  last reply

anyone know of any good open license video editing programs??

Me and my friend are working on a short action trailer and need a good editing program that can do gun flashes and is easy to use. also if you have any tips on effects to use or how to do sound effects that would be a great help. im a pc btw

Question by gantyman   |  last reply

How to write code for Text extraction from Image using Raspberry Pi?

Hi ... I'm Student of Electronics . I'm Doing Project on Data extraction from the Image of  Vehicle License plate . What are the algorithms I need to use in the software code to Extract Number from the License plate Image. What is the programming language Suitable for this task.? Thank you.

Question by rkreddy416   |  last reply

Is Arial a proprietary font?

Is Arial a proprietary font? Is it owned/copyrighted by Microsoft? Does the use of it's '.tff' file (such as in software source) require a license?

Question by action_owl   |  last reply

is it illegal to sell sodium and calcium?

I know sodium and calcium are both strong alkalines and make hydrogen gas and ignite it when put in water. So is it illegal to sell it completely or do you need to have a license.

Question by chinarian   |  last reply

Can you make letters, pictures or movie at a distance with a laser?

I have seen comercial units for sale that are thousands of dollars and require a license to operate.  I would like to make a DIY laser projector to display a word, symbol or video covertly at a distance.

Question by yoduki   |  last reply

Is there any way to make a long range video transmitter? Answered

I have looked into commercial transmitters, but they are too expensive, and do not achieve the range I want. I would like a transmitter that can transmit video at least 1 mile, but is still legal without a license.

Question by kjjohn   |  last reply

LED SOS without programing?

If/When i get my pilots license, I would like to build a survival kit that contains a high powered LED "flare" that flashes ..._ _ _... I don't wanna over complicate things by having to program a microcontroller. Maybe a 555 timer?

Question by conrad2468   |  last reply

WMA DRM Removal

I recently downloaded some music from SpiralFrog ( because I'm too cheap to pay for music, but unfortunately It's DRM-protected WMA so I can only play it on my computer. I want to play it on my cell phone, but it only plays mp3s. Does anyone know a free way to convert my WMAs (with play licenses) to mp3s?

Topic by Trebawa   |  last reply

Where could one acquire a small O2 gas cylinder? Answered

Where could I go to get small O2 tanks without much expense for individuals without health issues or special licenses of any sort? I DO NOT need anything of a specfic grade as this is for combustion. I wont be breathing this (at least not on purpose) I want is the small medical sized bottles

Question by The Ideanator   |  last reply

What radio frequencies will be legal for wireless microphone use in 2012? Answered

Hello, I will be wanting to purchase UHF microphones that comply with the new frequency changes in the UK. I have found many recourses on the internet but none seem to match up? I would be very grateful if someone were to tell me what channels you can operate on (license exept) in 2012. Many Thanks Oscar

Question by oscarthompson   |  last reply

How much DNA does forensics need to get a good sample? Answered

I got my new drivers license today. I would have kept my old one, but the guy working there said they were sending it to Jefferson City, the capitol of Missouri. They already have all the info on the card in their database. How much material do forensics need to get a good dna sample? That would be a really clever way of building a database without people knowing if you could isolate a person's dna from the other people that touched the card.

Question by Vorenus   |  last reply

How does radio really work?

             I'm studying to take the exam for a technician class ham radio license, and have been reading up for it.  However, the book just gives practice, not theory.  For example, it says that radio energy is carried down a coaxial, window, etc. cable between the two conductors, but it doesn't say how this actually happens or works.  I know what radio does, but I'm a little lost when it comes to theory regarding its transmission, being carried in cables, filtering, SWR, etc.  Answers are appreciated.  Thanks!

Question by mad magoo   |  last reply

Open-Source Kinect coming on market.

Remember Adafruit's bounty for cracking the Kinect? They might have been a bit hasty paying out for the hacks, since the Israeli developers of the technology within the Kinect have decided to sell similar devices themselves, called PrimeSensor, and release their code on an open license. One of the first licensees has been computer maker Asus which has paired the PrimeSensor with two devices that stream data from a PC to a TV via wireless. This lets owners get at the media on that PC using gestures rather than a mouse. Lithium Rain will be delighted... PrimeSense website Asus. BBC story.

Topic by Kiteman   |  last reply

Yaesu FT-290R internal battery power? Answered

 I have recently become a licensed radio amateur in the UK. I have acquired a few radios and my main one at the moment is a Yaesu FT-290R. I have been running it off a 12v regulated power supply just fine up to now, but I cannot get the 8 internal "C" cells to power it. I've put in 8 new Cs, correct polarity. I've looked at a .PDF of the owner's manual online, no help there. Any ideas?  I really want to get into SOTA and WOTA, but with no portable PS I can't.... :-( By the way, my callsign is M6AIM, mike, six, alpha, india, mike.

Question by DELETED_zoltzerino   |  last reply

is it legal to sell potassium chlorate and perchlorate in Australia?

Hello i am starting up an online store, and two of the products which i wish to sell , are potassium chlorate and perchlorate, however, i do not know, nor know where to find out, what the restrictions are on selling perchlorate, and what licensing ill need  to ship potassium perchlorate, by courier. i have already checked, and i am allowed to ship them, however im not sure about the restrictions on selling them and if i need permits for them, since they can be used for rather naughty things! also, what restrictions apply to iodine crystals, as i plan on selling it too, or must i just report every sale to the proper authorities?

Question by oldmanbeefjerky   |  last reply

Gadget Gangster Propeller Platform

The Propeller Platform Module (pictured below) includes an 80Mhz, 160 MIPS Parallax Propeller microcontroller, 32kb of EEPROM with space for a second EEPROM, 5V and 3.3V Voltage Regulators and the pin sockets to add additional Gadget Gangster Platform modules like the LCD UI Module or the Prototyper Module.All Gadget Gangster Platform Modules utilize .1" pin spacing and are breadboard compatible. Here's a little video demonstration of the LCD UI and Propeller Modules: What is the Gadget Gangster Platform?The Gadget Gangster Platform is a lot like the Arduino with a few improvements on the basic idea;-Modules (a.k.a. shields) can be connected to each other on top and bottom. For example, you might have a Propeller module in the middle, an LCD UI on the top, and a prototyper on the bottom. We've got a few initial modules to start, and we'll continue to expand on the selection with more modules and microcontrollers.-Pin spacing is .1". This makes the Platform compatible with breadboards, and it lets you use Platform modules in combination with other project boards.-The board footprint is 3.8" x 2.5", which is the same footprint as ExpressPCB's MiniBoard service. This makes it easier to add your own custom module.-Because they're featured in Jon Williams' Spin Zone column in Nuts and Volts, they're well documented. The Propeller Platform Module will be the basis for many of projects described in his upcoming columns and the LCD UI module will featured in his September '09 column. -Platform Modules are licensed under the MIT license (essentially public domain), giving you the flexibility to use the design in commercial products or anything else without restriction.[/list]I'm super-excited about these new project boards. There's more info on Gadget Gangster but if you have any questions, you can just reply to this thread.

Topic by Gadget Gangster   |  last reply

Mac and Pc

I am trying to install Mac OS x on my AMD pc but when i get to disk utility's i don't see my hard drives so i cant format it and i cant install Mac OS can any one help.i am using Kalyway_Leopard_10.5.2_DVD_Intel_Amd from this link i know its wrong to pirate things but really im only installing this to try it. i am thinking of buying a mac or at least a mac license.Now to the technical information.i have 3 partions set up 1 for windows:50G NTFS1 shared:10G FAT321 for Mac OS x:45G FAT32i have aCompaq presario F700 with xpAMD Athlon 64X2 Dual-Core Processor TK-57 1.60 GHz, 960MB of RAM

Topic by chrischavez   |  last reply

LED car headlights colour temperature (Australia)? Answered

I was looking to replace the headlights on my car to LED ones, but I'm kinda conscious about the legal requirements I contacted the Licensing and Vehicle centre/department/whatever to ask about the max colour temperature, but the best they gave me was what was in the pic below. Does anyone know how to convert that or something into colour temperature? I know they sell 5000K lamps at a nearby automotive shop, but they also sell a few more... questionable accessories. I really don't want to have to drag my car in and have to pay several hundreds over just a few headlights; might as well just take the ticket if I ever got one. Other than that, they should have the same brightness, throw, etc. Thanks

Question by .Unknown.   |  last reply

Im needing help with instructions and especially pictures on building A Quik and E-Z Ham Radio antenna ---PLEASE

I'm trying to find an instructable showing step-by-step, coming out of a HAM RADIO to a home-made Antenna. So far, all I have is the plug that screws( Where the Antenna plug screws on) on to the back of the mobile unit itself. The plug used to go to a magnetic antenna , but I cut that off because it was broken and wire was fraid in two peices. SO, like I said all I have is that screw-on plug, that needs to somehow connect to wire? and on to the Antenna, but not sure where to Begin. Any Help would be appreciated. Not looking for the Best antenna, I'm looking for something Fast and E-Z to build, to possibly get my radio out and too just listen, then of course I have to be licensed. Remember something FAST ?

Question by Dirtybeerguy   |  last reply

I think someone has hidden a tracker on my bike to locate and steal it.

I have a cargo bike that is pretty exspensive. I found a small item under my dogs seat . It was not like purposely concealed but I may not have found this thing for a while .  It looks like a  small kids flashlight . It had a blue rubber cover with a happy face on it .But it is not a flashlight . It is about 2 inches long and 3/4 of an inch wide . When  you remove the cover there is a - a meta-dv1 circuit board - a small blue led which was wrapped in a cover that said 125 degrres c on it - 2 lithum cr2016 batteries  Please help me figure this out . I have a invisible chronic illness that caused my drivers license to be revoked. My bike is my life line to the world . I need to know if some organized group of theives is trying to track me.  Many Many Thanks to anyone who can help    

Question by dapper dad    |  last reply

It it legal If I use someone elses music/Tune in My Video (trailer)? Answered

Soooo I was searching on YouTube (bored as always) And I found a small YouTube channel (less than 200 subs) With a Tune that sounded alright i was wondering if it is legal to use The Tune in my own Video If i gave that person The credit for it in the video (also in the description with link to they're channel) This is what it said in the Description of the Video: Uploaded on Apr 23, 2011 Sheet Music: Please credit me if you use my score in any way :3 And at the very Bottom it said, Creative Commons Attribution License (reuse allowed) whats that? it also gave me the option of remixing the Video. Also Here is the link to the Video On YouTube if it helps more: Thanks In Advance to anyone reading this and giving me an answer -Kevin, 7/9/2014 USA 

Question by KittyOfCamelot   |  last reply

Any ideas for near space (weather) balloon telemetry? Answered

Hey guys, I'm considering a project like the recently popular near space balloon project. The only twist is that it could float for several days/weeks at a time. The major problem I have is that I need some way to reliably communicate with the system. The balloon would have to send climate data, gps data, and maybe photos. A video feed would be good too. I'd have to be able to control its descent and control its cameras. The issue I see is that many common systems are only good to about 40 miles which would still be way too short of a distance. Cellphones are obviously out of the question (way too unreliable up there). Satellite phones would break the bank. Power consumption is also a concern I have. I would consider getting an amateur radio license if you guys think it would help.  Note: I plan to use arduinos. JP Aerospace does some of the stuff I want to do with this potential project. The photo is their Away 46 mission.

Question by DIY Emilio   |  last reply

French paramilitary forces break the Windows ...

.The French administration is slowly replacing Microsoft's products by open sources solutions.It started few years ago, 2005, with OpenOffice, then with Mozilla.And now, the French Gendarmerie (paramilitary forces) plans to replace Windows XP by Unbuntu Linux. are three reasons behind the move [...]. The first is to diversify suppliers and reduce the force's reliance on one company, the second is to give the Gendarmerie mastery of the operating system and the third is cost [...]The move away from licensed products is saving the gendarmerie about seven million euros (10.3 million dollars) a year for all its PCs.The 70,000 desktops of the French Gendarmerie should be 100% Linux by 2013-2014.This is, again, a proof that Linux solutions became mature enough to compete with Microsoft Windows.Dell now sells computers with Linux instead of Windows.OLPC and EEEPC use Linux.Several administrations around the world are seriously planning to move to Linux and Open-Source.Is this is the beginning of a new era ? How many administrations around the world will abandon Microsoft too ?How long before buying a computer with Linux sounds like a serious option for a majority of consumers ?I wonder if Microsoft really feel worried about that ... =o)

Topic by chooseausername   |  last reply

Arduino alarm with LDR and RFID disable feature?

Hello. I understand that this sounds like an unbelievably simple idea, and so I thought it would be. I have successfully written this first code, that detects an RFID tag and sounds a beep, but I am struggling with getting the second to work. Any ideas? First Code -- this one WORKS! Code: /*------------------------------------------------------------------ This is a sample code for RDM630 RFID reader by Spekel( This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. -------------------------------------------------------------------*/ #include #define rxPin 2 #define txPin 3 #define SPKR 7 char code[20]; int val = 0; int bytesread = 0; //------------------------------------ //create a Serial object RFID SoftwareSerial RFID= SoftwareSerial(rxPin, txPin); void setup() {   Serial.begin(9600);   Serial.println("Serial Port Activated");   RFID.begin(9600);   Serial.println("RFID Reader Activated");   Serial.println("Scanning...");   pinMode(rxPin, INPUT);   pinMode(txPin, OUTPUT);   pinMode(SPKR, OUTPUT); } void loop() {   val = 0;   bytesread = 0;   while(bytesread < 12)   {     // read 12 digit code     val =;     if(val == 3)     { // if header or stop bytes before the 10 digit reading       break; // stop reading     }     if(val != 2)     {       code[bytesread] = val; // add the digit       bytesread++; // ready to read next digit       code[bytesread] = '\0'; // add the NULL     }   }   if(bytesread >= 12)   { // if 12 digit read is complete     Serial.print("RFID Detected - Tag: [");     for(int i=0; code[i]!='\0' ; i++)     {       Serial.print(code[i]);     }     Serial.println("]"); //print the whole 13 bytes     for (int i=0; i<200; i++) {  // generate a 1KHz tone for 1/2 second   digitalWrite(SPKR, HIGH);   delayMicroseconds(300);   digitalWrite(SPKR, LOW);   delayMicroseconds(300);   }     Serial.println("Scanning...");   } } --- You didn't even need that but I assume you understand the setup now --- The second code is exactly the same, apart from it contains and LDR that decides whether or not the value it receives has changed enough to sound the alarm and does so, allowing the alarm to be deactivated by an RFID. This does NOT check to see if the RFID tag is the correct one, that is to be written in later. At the moment I get a constant beeping whether or not the RFID tag is used to dissarm, or there is no beep at all. Any ideas?? ^^ Please actually read this before answering my Question!! Code: #include #define SPKR 7 #define rxPin 2 #define txPin 3 char code[20]; int val = 0; int bytesread = 0; int lightPin = 1; int variable = 0; int secondVariable = 0; int differenceVariable = 0; int ledPin = 13; SoftwareSerial RFID= SoftwareSerial(rxPin, txPin); // --- Initiation Complete --- void setup() {   Serial.begin(9600);   RFID.begin(9600);   pinMode(rxPin, INPUT);   pinMode(txPin, OUTPUT);   pinMode(SPKR, OUTPUT);   variable = analogRead(lightPin); } // --- Setup Complete --- void loop() {   variable = analogRead(lightPin);   Serial.println(variable);   delay(50);   secondVariable = analogRead(lightPin);   differenceVariable = variable - secondVariable;   if ((differenceVariable^2) > 200) {           val = 0;       bytesread = 0;       while(bytesread < 12) { // read 12 digit code           val =;           if(val == 3) { // if header or stop bytes before the 10 digit reading               break; // stop reading           }           if(val != 2) {               code[bytesread] = val; // add the digit               bytesread++; // ready to read next digit               code[bytesread] = '\0'; // add the NULL           }           for (int i=0; i<200; i++) {  // generate a 1KHz tone for 1/2 second               digitalWrite(SPKR, HIGH);               delayMicroseconds(300);               digitalWrite(SPKR, LOW);               delayMicroseconds(300);           }         }       if(bytesread >= 12) { // if 12 digit read is complete           Serial.print("RFID Detected - Tag: [");           for(int i=0; code[i]!='\0' ; i++) {               Serial.print(code[i]);           }           Serial.println("]"); //print the whole 13 bytes           for (int i=0; i<200; i++) {  // generate a 1KHz tone for 1/2 second               digitalWrite(SPKR, HIGH);               delayMicroseconds(300);               digitalWrite(SPKR, LOW);               delayMicroseconds(300);           }           Serial.println("Scanning...");       }    } } Thank you very much for any help that you can give, AMouse197 (I accidentally posted this in the wrong forum so have moved it)

Question by anonymouse197   |  last reply

Why cant i post my instructable? Answered

So i have about 10 finished ibles saved as drafts, and today ive been wanting to post at least one of them since there are a few applicable contests running. So i went into edit and clicked publish, it took me to screen where you have to add channel, category, license keywords etc... I used  attribution noncommercial share-alike which is the default it automatically brings up, i clicked 'publish now!' and nothing happened, the url didnt change, there was no loading icon, nothing looked like it had changed at all. So i tried clicking the 'Yes, publish my instructables' at the bottom of the page and still nothing happened. I tried both entering and not entering the ible into 3 contests, but no luck. Ive tried 3 times today, ive turned my internet and computer off and on twice. I really have no idea whats going on, ive posted 28 ibles over the course of 3 years and i dont think ive had this trouble before. The main contests i need to enter all end in about 2 weeks and i have a ton of ibles i need to enter so if anyone could proivide an answer ASAP that would be great

Question by DIYWEAPONS   |  last reply

long range radio control flying

Hello all...I was looking in at the discussions of the possibility of long range radio control airplane operation and can make a few comments drawn from my research into the topic, with my opinions directed toward the USA market area ; First, Americans are bound by Federal Communications Commission regulations so we must abide by them or risk steep fines or legal trouble if caught. Second, the frequencies assigned by the FCC for radio control hobby use are already allocated, so modifications to your control systems in terms of frequencies could be illegal. Third, the maximum output for radio systems in the hobby is 1000mw (1 watt), which will easily control your miniature aircraft out to 1 to 2 miles, where you will need a video camera, transmitter, reciever and viewing device to even keep track of it ! There are several manufacturers that are way ahead of most of us here - offering pre made systems that are plug and play (no head scratching needed) . Search "FPV systems" on your computer and you'll find them. Bear in mind that to use these systems in America, you will need to obtain an amateur radio (ham) operator license to be legal (again, so if you get checked, you won't get in big trouble with the Federal Government ). I'm still looking into it myself, but if you want to see a good example of a really sharp Canadian who has a handle on this, search " VRflyer" on YouTube. He started doing this quite a few years ago and has some great video of his projects and results !

Topic by 2512rc 

XP pro hardware drivers: library, cache for system when detecting new hardware

Where in the XP Pro OS (operating system) can place all the drivers needed when plug and play starts detecting new hardware? Background: I am currently overseas and the home computer my wife normally uses has crapped out on her. She sent me the HDD (hard disk drive) and I will install XP Pro along with all the applications, but this time will create an image onto the hard drive so she can recover if she needs to (Acronis Image). I was lucky enough to run a driver program that picked up all my drivers (Ghostdriver? program) before I left home and have the drivers the system will need once I send it back to my wife and she installs it. I believe that some of the hardware drivers are located in C:\Windows\System32\drivers but am not sure if this is the only place or if I can just "drop" my copy of drivers into this and have the system pick them up as it "discovers" it's new hardware. I do realize that she may have to reactivate the Microsoft XP Pro license and she can handle that (we also do have a legit copy of WXPPro). Any suggestions would be greatly appreciated. Thank you, TJ I am glad I asked, I did not think about the the possible driver conflicts. I will try both the CD and Driver Magician. Thanks!

Topic by wil75son   |  last reply

nPlayer Game Clock for Hexagonal Chess (Need Help Sourcing LCD and Misc Parts)

Hello, I am sourcing components for a project. There is a 3 player chess variant called hexagonal chess. I want to make a 3 player game timer. The idea is to have three displays, one for each player on their side of the board. Each display has a button to stop the timer and start the next. Because there are 3 players, it won't work well to have a single timer between them, as is done with a 2 player timer. I don't have much hardware experience but I can read/write C/C++ well enough. I will be developing under Linux. These are the components I am considering. FRDM-KL25Z arm m0+, needs some modification to activate real time clock. has usb control 4 digit, 7 segment display A basic LCD display - $6.86 each, can I find these cheaper elsewhere? Will the m0+ be capable of driving 3 of such displays simultaneously? Is there perhaps a more appropriate solution? What other bits am I missing? Like I said, I don't have much hardware experience. I know I need buttons...I've never hooked up an LCD before, is there anything special I need? I downloaded the manufacturer PDF for the particular unit (FE0202W). It doesn't give much info. It doesn't even say how much voltage it is rated for. Is this just such a basic component that it doesn't matter so much??? Kind Regards, Movo PS: All designs/code will be published under an opensource license.

Topic by tmckinney1   |  last reply

Safe removal of a ~30' HAM Radio Antenna

Hello all, I have a friend who has a 30 foot (approx) HAM Radio antenna mounted on his garage.  The pole base attaches to two brackets which are anchored to the exterior wall of a garage.  Near the top of the antenna, 3 cable anchors connect to brackets on the roof.  He wants it gone, and wants me to take it.  But, this must be planned out carefully.  The pole could be lowered 3 feet or so, so it makes contact with the ground.  It could be used as the fulcrum to lower this down into his backyard.  Power lines are not in proximity.  If several people were on the roof, could that point be used to lower the antenna gently to people on the ground?  My concern is that the construction looks aluminum. The pole is 2" steel pipe.  ButI cannot be certain on the actual antennd contruction or weight.  There are 3 or 4 small boxes mounted at various heights on the pole.  I can't image they weigh too much.  Can anoyone tell me what there are used for?  Occasionally, a red led will blink on the bottom of the case. I am excited to acquire components that one day may help me get my amateur license.  But I am concerned about how to safely do this, and will not attempt without a very clear plan.  I don't want it to end up being too heavy, and slingshotting the people on the roof (like something that would happen to red green).  I also need to insure his roof is not damaged.  I think the brackets will be left on, and the cable cut at the base.   Any knowledge is greatly appreciated!

Topic by huck alexander   |  last reply

Arduino Multiplexing Code Issue

I'm trying to select a pattern for 12 multiplexed leds (2x6) using the input from a pot. The different patterns are stored in arrays. To complicate matters two of the states include a blinking led, the first, redShift attempts to blink a single led, 1, using a for loop to step through an array. The other holds on leds 2-11 and flashes 12 using the same method. The input from the pot is diveded into 12 sections and a switch case is supposed to select the proper arrays to read from. Here is the code: //LED TEST 2 w/ 74HC595 //by Bwrussell 2013 // /* Program Flow/Intent: Hardware: a 2 rows by 6 columns LED matrix running through a 595 shift register, arranged in a single line, and a potentiometer. The pot's input is divided into 12 ranges. These ranges correspond to incrementing LED patterns. There are 3 different types of pattern, the first blinks only the first, red, LED, the second covers 9 ranges and each one turns on an additional led, keeping those behind it on, the final type has all but the first LED on and blinks the final one. */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ //pin connections- the #define tag will replace all instances of "latchPin" in your code with A1 (and so on) #define latchPin A1 #define clockPin A0 #define dataPin A2 #define potPin A5 // analog pin for reading the pot's input. //looping variables byte i; byte j; //LED state storage arrays byte firstStates[] = {2,6,14,30,62,62,62,62,62,62}; //first row, non flashing, states byte secondStates[] = {0,0,0,0,0,1,3,7,15,31}; //second row, non flashing, states byte redFlashO[] = {1,1,1,0,0,0}; //row 1 states for red flashing byte redFlashT[] = {0,0,0,0,0,0}; //row 2 states for red flashing byte greenFlashO[] = {62,62,62,62,62,62}; //row 1 states for green flashing byte greenFlashT[] = {63,63,63,31,31,31}; //row 2 states for green flashing //Function variables byte dataToSend; //used in standardShift function byte redSend; //used in redShift function byte greenSend; //used in greenShift function //Storage variable byte normalState; //holds the array position for non flashing states byte redFlashingState; byte greenFlashingState; int rowOne; //passes the non flashing state of the first row int rowTwo; //passes the non flashing state of the second row int position; //holds the output from the potRead function void setup() { //set pins as output pinMode(latchPin, OUTPUT); pinMode(clockPin, OUTPUT); pinMode(dataPin, OUTPUT); Serial.begin(9600); } void loop() { position = potRead(); //read the current knob position switch (position) { case 0: //blink red led redShift(); break; case 11: // blink green led code here greenShift(); break; default: normalState = position--; rowOne = firstStates[normalState]; rowTwo = secondStates[normalState]; standardShift (rowOne, rowTwo) ; } } void standardShift (int firstRow, int secondRow) { byte stdArray[] = {firstRow, secondRow} ; for (i=0;i<2;i++){ //send data from ledData to each row, one at a time byte stdData = (1 << (i+6)) | (63 & ~stdArray[i]); // setlatch pin low so the LEDs don't change while sending in bits digitalWrite(latchPin, LOW); // shift out the bits of dataToSend to the 74HC595 shiftOut(dataPin, clockPin, LSBFIRST, dataToSend); //set latch pin high- this sends data to outputs so the LEDs will light up digitalWrite(latchPin, HIGH); } } int potRead () { int potRaw = analogRead(potPin); int potPosition = potRaw / 93; //returns a value 0-11 return potPosition ; } void redShift() { for (i=0; i<6; i++) { byte redArray[] = {redFlashO[i], redFlashT[i]} ; for (j=0; j<2; j++) { byte redData = (1 << (j+6)) | (63 & ~redArray[j]); // setlatch pin low so the LEDs don't change while sending in bits digitalWrite(latchPin, LOW); // shift out the bits of dataToSend to the 74HC595 shiftOut(dataPin, clockPin, LSBFIRST, dataToSend); //set latch pin high- this sends data to outputs so the LEDs will light up digitalWrite(latchPin, HIGH); } } } void greenShift() { for (i=0; i<6; i++) { byte greenArray[] = {redFlashO[i], greenFlashT[i]} ; for (j=0; j<2; j++) { byte greenData = (1 << (j+6)) | (63 & ~greenArray[j]); // setlatch pin low so the LEDs don't change while sending in bits digitalWrite(latchPin, LOW); // shift out the bits of dataToSend to the 74HC595 shiftOut(dataPin, clockPin, LSBFIRST, dataToSend); //set latch pin high- this sends data to outputs so the LEDs will light up digitalWrite(latchPin, HIGH); } } } I'm having two issues. First, the switch case doesn't appear to be working. I've monitored the pot input but there is no response from the LEDs. The second is with the for loops that are suppose to run the blinking. I know the loop on the inside will hold a pattern but in test code, without the pot, but adding the outside loop to step through the pattern array breaks it and the LEDs don't respond. Is the for loop running to fast to respond but not fast enough for POV? do I need a third loop that repeats each position but wouldn't that break the POV for the other LEDs? Or is there some stupid error I'm missing?

Question by bwrussell   |  last reply

VLC Vulnerable to Hijacking

For those who use VLC media player, I recommend reading this article. For those who don't know what VLC Media Player is, it is a widely used media player which supports many of the codecs that other common media players do not support. Source:,143542/article.htmlA flaw in the widely-used open-source VLC media player could allow an attacker to execute harmful code on a PC.The problem stems from a buffer overflow that can occur when the player processes subtitle files used for movies, according to a security advisory.The vulnerability existed before VLC was upgraded to version 0.8.6e in late February, but the bug appears to have escaped the last round of patches, wrote Luigi Auriemma in a note."The funny thing is that my old proof-of-concept was built just to test this specific buffer overflow, and in fact it works on the new VLC version too without modifications," Auriemma wrote.Video files can contain a link to a separate subtitle file, which VLC automatically loads when it plays the video. An attacker could use the buffer overflow flaw in VLC to execute malicious code contained in a subtitle file, and thus tamper with a PC. The flaw affects VLC players running on Windows, Mac, BSD and possibly more operating systems, Auriemma wrote.The VLC media player is part of the VideoLAN project. The player is free, and it is released under the GNU General Public License. VLC can also be used as a streaming media server for a variety of platforms. Courtesy of: flaws affect VideoLAN VLC versions 0.7.0 through 0.8.6. Users can fix the issue by upgrading to VLC version 0.8.6a or by applying the patch.Another solution from Torrent Freak: For now, the only solutions are not to run any subtitle files, or to grab one of the nightly builds. The downside is, however, that these might not be as stable as the regular releases.

Topic by Brennn10   |  last reply

Best motor suited for a diy generator that can provide 48V?

Ok, out of all places, I've seen this particular question be asked once and the discussion trailed off topic somewhere. Before we start, Yes it's a bit of a backwards thought but it's still a project, experiment and I'd do it for the sake of doing it. I have an electric scooter - lack of knowledge for proper battery care during winter lead it to 4 dead batteries. In my area, as long as the scooter is moved by an electric motor and makes less than 40km/h it's a street legal and non insurance or license requiring vehicle. Only issue for me is the limit of the battery capacitance and the eventual depreciation of the battery capacity. So I want to try an experiment of strapping a small weedwacker motor or even a hobby airplane fuel motor to an electric motor to act as a power source for the scooter. Don't laugh, It's an experiment. Yes, I'm aware I can just buy batteries. they are 50 bucks a battery + 12 bucks shipping and mine ran on 4x of these suckers. Buying batteries would work but would not satisfy the curiosity of an experiment.. Now then: ============================================== My scooter, when bought, could do about 12 blocks (1 block = 2km ) trip on a full charge. Before this winter, it could do 8 barely. It ran on 4x Lead Acid 12v 18Ah batteries. Now the batteries are connected in series so that's 4x 12v 18Ah making it 48v 18Ah. At this point we can drop the need to have the generator produce exactly 18Ah of current because that originally is the total battery capacitance, determining how long we can ride before draining of the batteries. So with a generator, all we need is to draw sufficient Current at the moment of generation. Which motors are best suited for generating 48v. I'm obviously missing some que variables here but I just want a point in the right direction. I'll most likely need extra head room and make a Step Down Buck Converter. Every time A talk of a diy generator comes up, people seem to mention Stepper motors. Seem like good choices? Brush-less, multi lead motors, yes - no?

Question by MilesT9   |  last reply

"It Will Be Awesome if They Don't Screw it Up"

Public Knowledge recently published a white paper on 3d printing (see link for downloadable PDF version). It compares low-cost home 3d printing technology with home computing and digital publishing, with specific reference to the possibility of DMCA-style legislation preventing the technology reaching its full potential. In many ways, today’s 3D printing community resembles the personal computing community of the early 1990s. They are a relatively small, technically proficient group, all intrigued by the potential of a great new technology. They tinker with their machines, share their discoveries and creations, and are more focused on what is possible than on what happens after they achieve it. They also benefit from following the personal computer revolution: the connective power of the Internet lets them share, innovate, and communicate much faster than the Homebrew Computer Club could have ever imagined. The personal computer revolution also casts light on some potential pitfalls that may be in store for the growth of 3D printing. When entrenched interests began to understand just how disruptive personal computing could be (especially massively networked personal computing) they organized in Washington, D.C. to protect their incumbent power. Rallying under the banner of combating piracy and theft, these interests pushed through laws like the Digital Millennium Copyright Act (DMCA) that made it harder to use computers in new and innovative ways. In response, the general public learned once-obscure terms like “fair use” and worked hard to defend their ability to discuss, create, and innovate. Unfortunately, this great public awakening came after Congress had already passed its restrictive laws. Of course, computers were not the first time that incumbents welcomed new technologies by attempting to restrict them. The arrival of the printing press resulted in new censorship and licensing laws designed to slow the spread of information. The music industry claimed that home taping would destroy it. And, perhaps most memorably, the movie industry compared the VCR to the Boston Strangler preying on a woman home alone. One of the goals of this whitepaper is to prepare the 3D printing community, and the public at large, before incumbents try to cripple 3D printing with restrictive intellectual property laws. By understanding how intellectual property law relates to 3D printing, and how changes might impact 3D printing’s future, this time we will be ready when incumbents come calling to Congress.   Podcasts and videos on 3d printing. Gothic Cathedral play set. BBC reportage. Freedom of Creation (3d printing designers)

Topic by Kiteman   |  last reply

ARK, hologram community

Hello everyone ! I'm building a project, called "the ARK" : It is a holographic pyramid with a new type of interface who gives life to your projects. Holography has always been fascinating: you see your 3D, you work on it, and you can create directly with your hands. Today this type of holography is really expensive compared to the simplicity of its fabrication process. I want to give the possibility to use it for everyone. The Ark has a software suite. Your drawings, films, models, all in holograms and in 3D GPS augmented reality view, directly on your smartphone to walk in your creations. And more:  with the sensitive gloves it will be like feeling the 3D under your fingers. Films, 3D, drawings, you will be able to touch and feel all of it. THE STORY : This project started two years ago with some research in my architecture school; I created the first holographic reflector “Ark-mini” for the students of our school. This creation is now in open-source (for more information see HERE, you can translate the page) For this new project, I want to create the more intuitive, complete holographic software: you will just need an USB and HDMI connection and let’s go! Order, and the ARK will follow it with his speech recognition menu. I will present 3 softwares for the Ark:     The ARK-creator for your 3D creations     The ARK-movie: what you film is what you see… in holograms.     The ARK-net to send directly in augmented reality your project, to visit it with you tablet or smartphone. This project is a personal initiative that I have been developing since last year, thanks to the help of some forums and Internet’s people who follow me. Today I propose you to make this project a reality. The first Ark serie will be presented in Paris, at the “Futur-en-Seine” numeric convention in the “Gaité Lyrique” on 13th june, and at the end of june for my Diploma. The thing is, i want to build this project with a creative commons license (open-source), and i'm trying to build a community. For the moment, i make a simple design for the ARK, i will have six month to build the software. We can (i hope so), in the future, create something like a "Jarvis" (who do not dream about this :) ). For the moment, i'm finishing the file with the design and the prequel of the software (openframeworks). But you can register in the forum and i'will send you a newsletter when it will be done. I hope we can make something beautifull, and, it is not just an idea:  i am doing it (but i need you)! here the LINK of the project here the FORUM / COMMUNITY

Topic by vmarsat   |  last reply