How to create RFID antenna

Can you please guide me as how to create RFID Antenna and how it can be integrated with RFID reader ?

Posted by arumansoft 5 years ago


TakeAWay Festival London

Takeaway Festival is a RFID workshop festival tailored for designers. It's located at the Dana Center in London. So if there are any London based instructable members, hit it up and let us know how it was!Do it Yourself Media ... I like that.-bg

Posted by lamedust 10 years ago


Challenge - RFID reader + Wifi Module Low Cost.

Hi Guys,I'm an Oracle Architect and I have one customer that want to monitor water dispenser, he wants to know if water bottle was changed. I have a software to control it, but actually the people need to input this data manually and I would like one solution to do it automatically. I'm thinking to use RFID Reader on water dispenser and paste passive tag on water bottle and with this I'll receive the information and this data must to be send using wifi, I can't have cable in this solution (data and power cable is not possible). In my investigation, I just find rfid reader (UHF) able read a passive tag in 1 meters distance, the issue is, the UHF module is very expensive, I saw UHF module for 40 USD and I need something more cheaper. Is there another way to do it? I need suggestions and help to developer it.If need more info, send me email.Regards, Haysar Lelis

Posted by HaysarL 8 months ago


'ible req: RFID Ring

Topic says it all :)  No access to a 3D printer

Posted by Lycaon 3 years ago


RFID query: Programming RFID lock to accept "pre-existing" RFID chips?

I have no prior programming skills, and only a basic understanding of RFID technology. As my initiation to Arduino programming, I would like to build an RFID door lock/catch. I know you can buy RFID tags to program the system to accept, but can you also program the reader to accept other items you may have with an RFID chip? I'm not sure what other components might be in place to prevent that from functioning. Disney has RFID chip embedded bracelets, for instance which are used for a variety of things around the park.  They way I imagine the programming is that the reader reads an RFID and then records that ID to accept? Is there much more to that? Apologies for my ignorance at this point. Thanks to anyone for their clarification!

Posted by davidandora 4 years ago


rfid and arduin for barrier gate

I want to create a project using arduino barrier gate and RFID , as well as make use of the dc motor for driving the gate . please help me to complete this project , I have not been able to create a code arduino with RFID Thank you

Posted by AhmadA43 3 years ago


Need help connecting a servo and RFID reader to arduino

I need help connecting a servo and RFID reader to an arduino so that the servo turns when the reader is activated. Are there any instructions or tutorials that anyone can provide? 

Posted by hthnc-student 5 years ago


RFID questions

I am wanting to create a fun RFID / NFC device that will detect when different people walk into a room. We all have individual RFID door tags to open a door so I was wondering what the range was on RFID, would the person need to tap their fob or is RFID strong enough to detect if somebody is just carrying the fob in their pocket? If the RFID isn't strong enough, could I use something in their phone to detect them? Bluetooth maybe? Everybody has an iPhone, could I detect something on that? Any thoughts? Thanks. Phil

Posted by filthyPhil 4 years ago


Increasing the range of an RFID implant

So i was already planning on making both my cars keyless with RFID technology and possibly the house door to and i stumbled upon RFID implants. now they are pretty new to me but every thing i have seen on them, they are only able to be read at about 2 inches away.  With a good enough reciever could i increase that range to work better for my applicatiion?

Posted by ZACKHICKMAN501 7 years ago


RFID SENSOR FOR LAPTOP/PC THAT KNOWS WHO YOU ARE :p

Somebody needs to figure out a way to use a usb and connect it to a arduino or a raspberry pi because I am TIRED OF HAVING TO PUT IN PASSWORDS OVER AND OVER AGAIN!!!        thanks, thomas

Posted by txkirrane 4 years ago


RFID READER HELP

Hello, can anyone help me design an RFID reader which can tell me when something is missing. I would like to build a reader for my file cabinet. I know this is hard but the reader will have to keep reading the files by maybe pinging and when a file is missing from the cabinet an LED will light up and maybe a small readout telling me what file is gone. Cabinet is small only 300mm so if anything is more than 300mm away from the reader it will light up. Can anyone help?

Posted by BryceK2 3 years ago


RFID BLOCKING, MADE SIMPLE

I have seen RFID wallets, sleeves, and cards.  I like the IDEA of RFID blocking cards that you sandwich your credit cards between. So, my question is thus... If I had two cards made of 21 gauge aluminum and placed them on in the last pocket on both sides of my wallet, would this block the RFID scanners?  If not, then what would it take? What just programming some RFID chips and put them in my wallet to eff with the scanners?  I know there are things like this in the market, but very over priced.  I have contacts in the RFID scanning and deployment world, so it would not be hard for my to get my hands on this stuff. What do you all think!?

Posted by benjaminleebates 3 years ago


Arduino with RFID MFRC522

Hi, I need your help with Arduino and RFID MRC522. I need a program that reads the card blocks and stores them in an array, reads the UID of the card and saves it in a variable, then instead, the opposite direction, that is, write the card blocks with values ​​in an array and write to the UID of the card with a code contained in a variable .. I hope for your help because I'm desperate with a school project to be urgent, sorry, unfortunately I do not speak English and I had to rely on google translator.

Posted by Biribiri71 2 years ago


RFID Tracking?

Someone posted a question asking about RFID tracking and didnt get a good response. I also have not found a simple answer to my question on Google. So I figured I'd re-ask the question in hopes of a better solution. In short, friends and I go disc golfing pretty regularly and losing discs is always stressful (obviously we are not pro's so the occasional disc will go into the wood or tall grass etc). I thought wouldnt it be great to stick a tracking device on these discs to help find them. RFID's being small enough to just stick them on and not sacrifice too much in performance to the disc, i figured that would be the best way to go. Question here: Is there a practical way to track rfid tags? basically just a device capable of telling you when the signal is getting hotter or colder. Thanks, DJ

Posted by madzilla 8 years ago


12vdc Arduino with bluetooth and wifi and RFID reading ability

I am looking to place one of these devices in a few storage rooms at my office and have them monitor the RFID stickers that are on my stock. Please message me directly. If you wish to be properly compensated for your work please make sure to have a connection with someone who lives in New Hampshire or Massachusetts as I would prefer this item that is developed to stay hidden until I obtain a proper US and International Patents.

Posted by JohnD19 3 years ago


Passive RF battery?

Hey i was just wondering what are typical conversion rates for signal to electricity in passive RFID tags? Information on the subject is usually not geared towards the electrical charge being generated.

Posted by Qcks 4 years ago


Equipment tracking using RFID

Hello there. I have this project where i intend to track down equipments entering and leaving the room. My first problem is im a newbie to Arduino and i don't have any clue on where to start.  I've already installed the software but i dont know what to do. Anyone who can help me? Or can anyone give me the code on how my Arduino will connect to my RFID reader? THANKS A LOT. By the way, im using Aceduino - an Arduino clone here in the Philippines.

Posted by Estela Alano 4 years ago


Giving Commands to a Figurine to be Read Digitally

I'm trying to incorporate a series of RFID tags and readers for a project concept I'm working on. I have next to no RFID knowledge and mainly work as a conception-est. The problem I'm having right now is having an RFID or something similar inside of a figurine respond to a command given from another RFID reader or chip. I've played with the idea of putting and RFID reader inside the figurine, but threw that out due to space constraints. While the size of the figurine is not set in stone, I'm estimating somewhere between 2"-5" and there are other components that need to fit inside.  Basically, the command that is given heals the HP etc. of the figurine when it is touched to the the figurine (The HP and other values are recorded digitally).  I'm sorry if I'm not very clear. I guess a good analogy would be the Kartoz if anyone has heard of that. But instead of the reader in the Main bunny, the reader is in the  tags. And each "Tag" has a different function.

Posted by DestatiOverload 5 years ago


RFID Keyboard (Musical)

Hi there, I'm currently doing a University course in Digital Art and was wondering how possible it would be to produce an RFID keyboard (of the musical kind). In the lectures we've been studying about tags and readers which is all new to me, but I've been looking at a few different examples which use sound as their basis and was wondering if I could get something like a keyboard working. I've done a quick Google search and nothing has come up with regards to tutorials or anything related to producing something like this so I guess I'm the first to try it? I also looked on Ebay at parts and for an RFID reader and some tags it comes to around £10-15 which isn't too bad. For the keyboard part I was thinking of creating my own keys so that the instrument could be played with hands or feet as opposed to fingers (making it easier to play?). What do you guys think? Is it possible? Cheers, Andrew. P.S. Apologies for the lack of diagrams/pictures but this is just a quick thought and wanting to run it by someone before getting serious about it :).

Posted by kugarweb 8 years ago


Keeping track of your ants...

This may well be the world's smallest tracking collar. From an article in Science News.

Posted by kelseymh 9 years ago


Weight sensor kit sending message when weight reduces i.e. 80%

Hi, I am looking to muck up a quick prototype of a weight pad with BLE, Zigbee or RFID to send a message to a smart device when 80% reduction in weight has been achieved. Can someone point me in the proper direction? I like it to be fairly small. Thanks in advance! JC

Posted by JCDA 2 years ago


Passive home automation

Hey all, been working out idea's for a project recently, and kind of stuck on one point. So the plan is to do up some automation in my basement. Right now I was starting with my desk, using a phidget usb relay controller to control desk lamps, move on to insteon for actual ceiling lights, but one thing I want to do would be passive control. So if the system detects me coming down the stairs it will turn on the ceiling lights, then when it detects me sitting at my computer the computer will log me in. I was thinking rfid, but not finding any hobby boards for rfid with ranges over a couple of centimeters. I know people have done this with bluetooth, but on testing my computer will connect to my phone if I'm just about anywhere upstairs above the computer and kills the point of this whole endeavor so any and all help would be greatly appreciated. Thanks.

Posted by Frentraken 7 years ago


It had to happen: Real SnailMail

In hindsight, it's inevitable that somebody would create genuine snail mail, and recruit actual snails to carry actual messages.The gastropods have been fitted with equipment to allow them to send e-mails on behalf of visitors to a website.Instead of instantaneous communication, sent messages will travel at 0.03mph (0.05km/h) and could take days, weeks or even months to arrive.It is part of a "slow art" project called Real Snail Mail at Bournemouth University in the UK which will be showcased in Los Angeles in August.Each snail is fitted with a tiny capsule which holds a Radio Frequency Identification (RFID) chip. RFID allows objects to communicate over short distances.Users of the service send a message via the Real Snail Mail website which is routed to the tank at the speed of light to await collection by a snail "agent".As the three snails slowly amble around the tank, they occasionally come into range of an electronic reader, which attaches the e-mail message to the RFID chip.The electronic messages are then physically carried around the tank by the snails until one of the gastropods passes close to a second reader.It is then forwarded over the net in the usual way. So far, the three snails have managed to deliver 14 messages.Users of the service will hope that Austin is on hand to collect their messages. The Snail has made 10 of the deliveries so far with an average delivery time of 1.96 days. SnailMail siteBBC story

Posted by Kiteman 10 years ago


A tracker to find your lost item or keys

Hi guys, i want to make a tracker device which can track keys or items, but i have no idea what sensors do i use to work in a small parameter, any help? 

Posted by anepzamri 5 years ago


Arduino: HELP: How to perform action if two rfid tag UIDs have been detected?

I'm using an rfid-rc522 and I want to print to the serial a string of text if two rfid tags have been read in a given time period. Essentially this: 1. First tag is read (print to serial: Tag 1 has been read) 2. Wait 2 seconds 3. Second tag is read (print to serial: Tag 2 has been read) 4. Print to serial: Tag 1 and Tag 2 has been read) 5. Bonus: Keep this state - and then when a button is pressed (print to serial: Tag 1 and Tag 2 are finished) I know how to read the UID and print to the serial if one is read. Thank you so much for your help, it's greatly appreciated. Here is my code so far: #include     // Core graphics library #include // Hardware-specific library #include #include // For the breakout, you can use any 2 or 3 pins // These pins will also work for the 1.8" TFT shield #define sclk 4  // SainSmart: SCL #define mosi 5  // SainSmart: SDA #define cs   6  // SainSmart: CS #define dc   7  // SainSmart: RS/DC #define rst  8  // SainSmart: RES Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, mosi, sclk, rst); #define SS_PIN 10 #define RST_PIN 9 MFRC522 mfrc522(SS_PIN, RST_PIN); float p = 3.1415926; void setup(void) {   Serial.begin(9600);   SPI.begin();   Serial.print("Starting cornhole leaderboard...");   mfrc522.PCD_Init(); // Init MFRC522 card   Serial.println("Scan PICC to see UID and type...");   // Use this initializer if you're using a 1.8" TFT   tft.initR(INITR_BLACKTAB);   // initialize a ST7735S chip, black tab   // Use this initializer (uncomment) if you're using a 1.44" TFT   //tft.initR(INITR_144GREENTAB);   // initialize a ST7735S chip, black tab   Serial.println("Initialized");   uint16_t time = millis();   tft.fillScreen(ST7735_BLACK);   time = millis() - time;   Serial.println(time, DEC);   // large block of text   tft.fillScreen(ST7735_BLACK); } void loop() {   // Look for new cards     if ( ! mfrc522.PICC_IsNewCardPresent()) {         return;     }     // Select one of the cards     if ( ! mfrc522.PICC_ReadCardSerial()) {         return;     }     if (mfrc522.uid.uidByte[0] == 0xA4 &&        mfrc522.uid.uidByte[1] == 0xB8 &&        mfrc522.uid.uidByte[2] == 0xB8 &&        mfrc522.uid.uidByte[3] == 0x96) {           Serial.println("Nate has checked in to the game.");           tft.fillScreen(ST7735_BLUE);           tft.setTextSize(2);           tft.setCursor(0, 0);           tft.setTextColor(ST7735_YELLOW);           tft.print("Nate ");           tft.setTextColor(ST7735_WHITE);           tft.println("has checked in ");           tft.setTextSize(2);           tft.println("to the game.");           delay(2000);           tft.fillScreen(ST7735_BLACK);     }     if (mfrc522.uid.uidByte[0] == 0x03 &&        mfrc522.uid.uidByte[1] == 0xFD &&        mfrc522.uid.uidByte[2] == 0xBC &&        mfrc522.uid.uidByte[3] == 0x02) {           Serial.println("Ted has checked in to the game.");           tft.fillScreen(ST7735_RED);           tft.setTextSize(2);           tft.setCursor(0, 0);           tft.setTextColor(ST7735_CYAN);           tft.print("Ted ");           tft.setTextColor(ST7735_WHITE);           tft.println("has checked in ");           tft.setTextSize(2);           tft.println("to the game.");           delay(2000);           tft.fillScreen(ST7735_BLACK);     } } Thank you!

Posted by djrage 2 years ago


proximity car key ??

Ok so I work at a car audio shop as an installer and I see so much different stuff and do a lot of custom stuff on cars.. Ive seen a lot of cars that are keyless.. its just a key fob. when you have the fob in your pocket the car knows you are there and lets you start the car with a push button... that stuff is at least 5 years old.. now the other day a new z07 corvette came in for work and the guy handed me a fob to bring it in the shop,, nothing new at first,, but as I approached the car I heard the locks click,, so I stopped and walked back a few feet and I heard them click again... this thing is unlocking and locking on its own as I get near and away from it... And it still gets better.. after walking to and from it a few times to confirm my suspension I finally opened the door... the dash was flashing and it said welcome technician. the key I had was a valet key.. the other key fob I had welcomed the owner by name... this is really cool... I needed both fobs because I was putting a remote starter on the car and both keys are required to program it.. the valet key I had also turned on the traction control and the car wouldn't go over 40 mph... that's a lot from just a key fob... NOW FOR MY QUESTION HERE.... Is this done with rfid or some sort of proximity sensor on the fobs?? I want to build one for my car but just for the locks and push button starter... but I want to retain the factory key also..any ideas or maybe a link to an instructable?? ive searched them but cant find one for my purpose.. lots of rfid stuff though..

Posted by aclark32 5 years ago


HACK a Passive RFID Transponder/ tag

I use an Amtech transponder to access my neighborhood.  The signal strength is poor and the association isnt cooperating with me to have the system upgraded or to offer me a new style of transponder.  I opened one my my transponders and it appears to be a PASSIVE RFID device.   HOW CAN I MAKE A PASSIVE RFID TAG INTO AN ACTIVE TAG?  I.e. HOW can I add a battery and/or larger antenna.  ANY other suggestions that you can offer would be appreciated.  

Posted by mmrogge 8 years ago


Glass capsule RFID not readable but work

Just wondering if anyone has come across a glass capsule RFID which cannot be read by any reader but work inside the machine?  We have tried countless of readers but none of them can detect anything of the chip.  Is this possible?  Anyone has any idea which can help us or can provide the reading service?

Posted by BT73 1 year ago


iDropper LEDComm Electronics

Has anyone used the iDropper and/or the LEDComm as mentioned in some posts on throwies recently. How does the rfid option work with these things.

Posted by sswcharlie 10 years ago


Magnetic or rfid music box

Hi, i was wondering..is there any possibility to make something like this: you all know the sound mats for kids, where they step on it and it has a sound box in it and plays a sound..i was wondering if those mats can be modified like this: instead of playing sound when you step on it, it should play sound when you put an object over it ( magnetic or rfid). any idea if it works and how and what is needed? Thanks!

Posted by gabrielbuta 2 years ago


Using Arduino + RFID to Email when something is removed from a box?

Hey everyone, I'm looking at completing  a home project using an Arduino (or perhaps a Raspberry Pi if its easier) and any help as to how to approach this or where to look would be really appreciated! Essentially I want a box filled with a number of items with RFID tags and I want the system to send an email telling me if an item has been removed (and preferably which). I'm pretty new to this, but I have a feeling I have seen similar projects around. Can this be done and if so can anybody help me? EDIT: I understand this may not be possible with RFID, but if so is there a different way of wirelessly checking (say once a day) if all items are present or not? Thanks!

Posted by Wintermute. 4 years ago


What happens to my phone in an RFID blocking wallet?

Greetings! I'm curious about everyone's experience with using RIFD blocking fabric for blocking phone transmissions.  If I put my phone in a pocket like this, will my phone struggle even harder to find a signal and run my battery down quickly? What other concerns come into play with using this to block signals to digital devices?  I plan to experiment with different fabrics from lessemf.com if anyone has some recommendations or warnings.   Thanks! image supplied by http://creativity-online.com/work/trident-focus-life-gear-collection/

Posted by scoochmaroo 4 years ago


REMEMBER YOUR STUFF BEFORE YOU LEAVE!!!

So I've got a real problem with leaving my stuff behind when I head out the door, and I was wondering how possible it would be to have a small device to help that. What I was envisioning, essentially, was little chips, RFID chips maybe, that you'd attach to your phone, wallet, keys, anything else. A reader would sit by the door, low power enough to give it just enough range to scan the doorway. You'd leave, but there'd be a sign on the wall showing checkmarks next to the things you have. Adding something to the list shouldn't be too difficult, or setting up a different person. This could show on a screen or using some kind of mechanical method. Either way, shouldn't need to ever be more than eight items. Anyone done something like this?

Posted by quantum_mechanik 4 years ago


Don't Do This To Your BART EZ Rider Card

BART, Bay Area Rapid Transit, recently issued RFID-based fare cards called BART EZ Rider. If you look closely, you can see where the actual chip is embedded within the card. Like other similar cards, I assumed there was a wire antenna also embedded in a rough spiral around the chip. The card didn't fit nicely on the outside of my Jimi wallet so I decided to cut a notch to make it fit better. While I didn't see any evidence of cutting the antenna, the card quit working. So, if you plan to chop your card, at least try the opposite side as mine!Since the Jimi only fits four cards inside, and I carry five, next up, cutting apart my Discover card...

Posted by ewilhelm 9 years ago


Cat chip logger

Could you modify the reader in a chip reading cat flap to log the details of the chips t hat pass through it rather than only let recognized chips open the flap? Chip reading cat flaps exist data logging is possible this I know, how to tie the two together is beyond me. Give me detailed instructions I could do it, but I'm more at home with working out how to wind the detector coil than what to do with it. The reason is this My sister has a problem, she is in danger of becoming a cat lady, or at least over run with strays or other peoples cats. Her current plan other than catching the visitors that are clearly street cats and delivering them to the local shelter, is setting a camera trap aimed at her cat flap and posting the visitor photos on the local area FB page with is this your lost cat under it.  couple of the poor conditioned strays she has managed to get to the shelter have been chipped it is  reasonable to assume that some of the others must be to, and they would be easier to catch possibly if their  owners were trying to do it. Even a simpler system that just connected chipped cat with photo, and there by identified which cats aren't chipped so presumably are true strays not just nominally owned would b of help those could then be targeted for capture and re homing first.

Posted by Stan1y 2 years ago


Long Range UHF RFID Integrated Reader

Hi, I am Planning to develop Long Range UHF RFID Integrated Reader which can Read Multiple Tags at a time (range between 8- 15 Meters range) and send information to my web application to store data, so will you plese let me know the components which i need to use along with assembling process. Thankq

Posted by bikhanpersonal 1 year ago


Embeding OpenCV code to microcontroller

Hello everyone...I am doing a project based on arduino, opencv and rfid....i am using the rfid tech for access control, i have put a constraint such that one has to use both the cards(rfid) and face detection for him/her to be granted access....the code for detection is working and then arduino and other components are working, how to  i connect the hardware(arduino) to the opencv code> please help. thanks

Posted by suleiman.alinassor 3 years ago


I need to keep my dogs from putting their nose on my windows. Design a static discharge zapper with rfid snsing

I need to find a way to stop my dogs from putting their wet noses on all my windows.

Posted by motogp4me 8 years ago


RFID Project...Arduino or something else?

Hey all, I'm working on putting together a project in the next few weeks and was looking for some advice.  I want to have different objects play different videos or animated gifs on a tv based on which of the objects are placed near a sensor. I've seen that there used to be products that did exactly that (http://www.nearfield.org/2008/09/rfid-peripherals) but most seem to be off the market now.  My thinking at this point is to use RFID tags on the objects, then have an Arduino or Mac Mini (if software and peripherals are available that I might not have found yet) send the command to play the video, then output it to a TV. I only have a few weeks to learn/assemble the components though, so the simpler the better. My assumption is that if there is a Mac based solution it may involve less steps, but I am open to learning Arduino if that seems to be the better route, and if I would be able to accomplish my goal in a short time frame.  At this stage I'm looking for suggestions/advice from people who may have done something similar in the past who might be able to put me on the right path. Thanks!

Posted by FutureManZerO 3 years ago


RFID tag ideas

I've got a handful of RI-TRP-DR2B 32-mm Glass Transponders...Don't really know what to do with them so I figured I'd ask around here.  I've attached a picture and the data sheet for this item.  Has anyone worked with these or similar devices before?  Also, any recommendations for a reader/writer (preferably something that'd work with a Raspberry Pi or Arduino)?  They operate on 134.2 kHz. Thank you.

Posted by XyzzyYYZ 3 years ago


RFID LED Light Cubes

Hi! Long time follower of DIY projects. I had never considered actually trying any of the projects I had seen before, until I came upon the November 2011 issue  of Popular Science and saw the RFID LED Light Cubes. I think the idea is just So Cool and really want to try it as my first DIY project. Of course (ahh Irony, you cruel mistress!) that seems to be one of very few projects whose full instructions were never released. I'm pretty bummed out about this and even tweeted Vin Marshall (the OP) about it. He responded that he didn't think that there were any plans to release instructions for that project which is just extremely disappointing. I mean... someone Made it for the issue... how hard could it be to write up a set of instructions? I have the ingredients, but not the recipe, it's like asking me to make a souffle if all I know is that it has Eggs, Milk, Flour, Butter, and Cheese. If the idea of this DIY was to interest new amateurs in DIY projects, then they succeeded! Since November of last year, I've been trying to get some help making this awesome concept, but I just don't have the know-how. I'm begging you, Please help me figure this one out :( Help me make my first souffle. Here is a link to a 2 page PDF of the original PopSci article (and all the info I have on this project) https://www.dropbox.com/s/bds0pe73godn45m/RFID%20LED%20LIGHT%20CUBES.pdf Sincerely (and very hopefully!), Czarr

Posted by Czarr 6 years ago


RFID Tags and Passports

Well, I'm finally getting a passport, due to the new law. Sadly, however, in time for the RFID law as well. I don't want to be carrying one of those around in the airport. Wired said you can disable it by smacking it with a hammer, but it stated that tampering w/ a Passport is against the law, so is doing that against the law? But anyway, I would preferably just want to put it in something isolating, like a lead bag or something. Faraday cages seem the best plan, however I don't know what I will constantly ground to. Hope someone can help :-)

Posted by zachninme 11 years ago


Android Gingerbread, RFID Skeleton Key, CNC Machine

Android Gingerbread RFID Skeleton Key CNC Machine USB Jog Wheel From VCR Parts Sexy Satin Nightgown Acrylic LED Lighting Sculpture Simple Paper Flowers Coffee Maker Bathtub Temperature Regulator Wooly Willy Table Show You Care with Custom Perfume Cute Pom Pom Socks Professional Rubber Stamps at Home Chocolate Space Invaders Annoying Beeper Mini Milling Machine Instructables.com - 82 2nd St. - San Francisco, CA

Posted by randofo 7 years ago


Modding High-end pet door

I currently own and am using a High Tech Pet electronic pet door (http://www.hitecpet.com/px-1detail.html) and would like to modify it to: 1) Read/activate via a small RFID tag instead of the very large (for a cat) sonic transmitter. The cat is feral (we lock him at night in the garage), so he sometimes gets in fights and loses his entire collar. The transmitters are $40 each! He's lost three so far. 2) Switch mode to "in only" at a preset time very night and "in and out" mode every morning. I like the features of this door, and it's already installed. It's extremely weatherproof and resilient. Most Lexan/acrylic cat flaps I've seen or owned aren't even in the same league as this one, which is why I would prefer to keep this door as opposed to modding a different brand of door. I know how to solder and have a very basic understanding of electronics. I could probably muddle through a DIY, but I'm not even sure it can be done. Is it as simple as locating the receiver on the board and replacing it with an RFID reader? Or is that wishful thinking? Thanks in advance for any insight, advice, help. :)

Posted by S2kvan 5 years ago


Small proximity sensors with short range and alarm either IR or RFID

I would like to make two key fob sized units that if brought within ~20cm of each other would sound an alarm from one of the units. I've seen a pair of key fob sized RDIF alarm tags that sound an alarm in one if moved more than ~10m apart. They sell for ~$50 US but I need something that accomplishes just the opposite from this device. I want to keep two pets away from each other (one bullies the other) and such a device would I believe accomplish this task. It seems like it should be relatively simple to design but I'm an artist and machinist and know little about electronics. I purchased a book entitled Practical Electronics for Inventors that has given me some knowledge about the basics of transformers, relays, capacitors, resisters, etc. but nothing on IR or RFID transmitters/receivers. Everything I read about RDIF is geared towards one stationary reader (or large hand-held unit) and one or more transmitters. I made one collar with an IR receiver from an R/C car and a small piezo alarm that would sound when I pushed a button on a remote. This works but only if I'm in the same room with the offending animal. I need something that works when I'm away or the animals are upstairs or in another part of the house. They are indoor only pets so the device need not be weather-proof. Anyone with knowledge of such things want to lend me a hand?

Posted by bigdaddyjt 8 years ago


Lost item finder?

Is there some instructable for this? Basically, just a penny sized sticker that can be placed on any item. If lost, then a device could easily scan for them (5 feet radius range, maybe) I've searched for systems like this, but they're all expensive.  It should be pretty simple, maybe passive RFID tags, and some kind of device that detects if it is closer or farther. I've checked on reader, but any cheap ones are in the $160 range and 3 inch distance. Long distance ones are like 500 and above. Except readers aren't really necessary. There isn't really any information that needs to be read. Just a way to tell if the signal is closer. Something like that could probably made in the $20 range but i wouldn't know I'm asking cause I lost the memory card for my camera (case and all). It was sitting on a desk, then it wasn't. It had some vacation photos that i hadn't transfered to PC yet. It was a grueling search, and I couldn't find it.  At some point in our lives, everyone needs something like that. Losing something important sucks, expensive or not.

Posted by alester333 8 years ago


Sonic screwdriver

Ok, Has anyone else thought of rigging a sonic screwdriver with an RFID chip to operate everything in your home, just for the sheer awesomeness of it?  I really want to try that after i saw some of the props out there.

Posted by ghostrider2 7 years ago


Arduino not communicating with CR95HF properly

I'm building an NFC reader/writer with Arduino Uno, Arduino click board and RFid click on ( http://www.mikroe.com/click/rfid/ ). The click on board has a microcontroller called CR95HF ( http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00025644.pdf ).  In order to make this work, i have to communicate through SPI. But I got the feeling it's not properly done.  I keep sending data in the way I believe is right (because all found examples do it this way and the datasheet says so),  yet I keep getting either 0 or 255 (when I move or touch the board).  Mostly I've tried to send and receive the ECHO, but nothing seems to work.  I'm starting to run out of ideas. If anyone please would like to help, it would be greatly appreciated.  (my code is included in the attachment). PS: this is an example that uses the same microcontroller on a different version of the RFid click board.  http://blog.solutions-cubed.com/near-field-communication-nfc-with-the-arduino/ 

Posted by EvelineV 2 years ago


Need help with Follow Bot

I'm working on a bot that I would like to follow me around. It's going to be bluetooth controlled. Looking for advice on how to make it follow the bluetooth device it's paired to, or another device like a RFID tag. Any help is appreciated. 

Posted by HaloMediaTech 4 years ago


Arduino Coder Needed - Will Pay

Hello,      I am in serious need of some help with code for a Arduino Uno project! This would not be for free of course. Just let me know what would be fair. So if your in the mood to help a dummy out, drop me a line! Here's some background on the project The project is a prop for a Halloween haunted house/escape room. The idea is for 4 RFID readers to detect 4 objects (Maybe optical sensors are better here for triggering the audio?not sure). Once all 4 objects are placed on top of each reader, the adafruit Wave Shield produces a telephone ring sound effect (I will be providing the sound .wav files to the adafruit SD card). I would also need to have a the ability to push a button to stop the ringing and skip to the next audio file on the SD card of the Adafruit wave shield. Hope that all made sense :). Below are links to all the pieces of hardware I am using: 1. Arduino Uno - I think you know what this is 2. 4 x RC522 RFID Readers  - http://www.robotshop.com/en/mifare-rc522-module-rfid-reader.html?gclid=CK7tv9qO384CFYGEaQodg8sGkA 3. Adafruit Wave Shield - https://www.adafruit.com/product/94 4. Maybe Photoresistors for triggering instead - https://www.adafruit.com/product/161

Posted by horizonfall 2 years ago