Arduino DuemilanovePi Arduino ElectronicsArduino PinsRaspberrypi ElectronicsDesign ElectronicsArduino RaspberrypiElectronics ArduinoArduino StuffElectronics SimpleForwardI want to make this... RFID & Arduino ( or as Jenn calls it an "Ar dork o" ) Sign up or log in to customize your list. Here's how it works: Anybody can ask a question The best answers are voted up and rise to the top I was looking to build a RFID operated turnstile similar to picture below. I will have RFID readers on both ends where the door would open from either end only if the RFID is authenticated on either end. I was wondering what are the type of locks used in these turnstiles which open the turnstiles when an RFID authenticated and then lock these turnstiles and prevent them from moving after a person enters through the turnstile after successful authentication. Are these special locks or some kind of electromagnetic locks ? Pipe is right: why would you expect us to know? An image search for turnstile mechanism shows up the image in Figure 1.
Without translating the text it appears to be a bidirectional device. Extending the solenoid on the right will unlatch the pawl allowing the mechanism to rotate left. The blue switch probably unlatches the solenoid so that it re-engages 120° later. The other solenoid allows clockwise rotation. simulate this circuit – Schematic created using CircuitLabSample turnstile control schematic. Pressing the RELEASE button momentarily energises the relay. The first contact latches the relay on. The second contact turns the solenoid on. The blue switch, when activated, unlatches the relay which drops out the solenoid. Sign up or log in Sign up using Google Sign up using Email and Password Post as a guest By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged electromagnetism rfid or ask your own question. Dialock, the Electronic Locking System
Dialock for hotels and resorts Organise your hotel or resort with the Dialock electronic identification and locking system. You can temporarily lift this restriction by proving that you're human: the lock just died, so we'll need an electronic doorlock... A good professional locksmith can make a lock for an existingHe just modifies the pins in another lock of the same type for the key to work. This way you don't have to throw away all theIt's a typical problem, it happens a lot. usb thumbdrives seem to have unique id (see the pamusb project) the 'unique id' is a combination of: I've always been dreaming of having a Yubikey (with RFID - MIFARE compatible) - they could be used for all kinds of stuff once we have(and they can easily be revoked if someone ever decides to quit the HSBXL - or severely abuses the space) For the programmers out there, have a look at this page: Pricing is $35 for one stick ... $300 for 10 sticks, 50 sticks go for $1.000
I think we can get enough interested people (possibly the other hackerspaces) to get 50 of them... As we have quite a few Arduino hackers on the premises... maybe it could be combined with a MIFARE module (f.e. SL018): (price: $18 for 1 - $145 for 10) A way it can be done: Submit a Buying Request Member since Mar 2014 Best One Way Immobilizer Cheap Alarm Systems 12V Engine Lock 5 6 Review(s) | Estimated delivery time: ships out within business days On-time Delivery in 29 days - Now with faster dispute resolution Customers Who Viewed This Item Also Viewed Product Name: Best One Way Immobilizer Cheap Alarm Systems 12V Engine Lock Category: Alarm & Security Short Description: RFID car immobilizer engine lock EL-1,intelligent anti-hijacking and circuit cut off,automatically lock and unlock car engine Package Size: 15.0 * 15.0 * 15.0 ( cm ) Gross Weight/Package: 0.15 ( kg ) Please give us your feedback about this page Click Here
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QP022 lovely cartoon dog car tissue box holder pumping paper box household home table decoration napkin holder free shipping car power window closer power window roll up FR-4WA for 4 door universal for different cars new case RFID invisible car alarm,passive keyless entry,immobilizer release car engine,bypass,push button engine start FS-55Here is a project for beginners using Atmel AVR ATmega8. The project uses some techniques that are very useful for designers to learn and utilize. Don’t waste time finding each part running from shop to shop. Get all the parts with exact specification in a ready to use kit! Purchase ATmega8 based smart code lock KIT. This device can be used to code protect any electrical device (like an electronic door, lock or safe). The user must enter a correct password to gain access. The password is entered using the built in 4×4 keypad matrix. The main LCD Module is used to display messages to the user. As soon as correct password is entered the relay is activated.
This is indicated by a LED which is placed near the relay. The relay remains on as long as the user wishes. You just need to press a key to deactivate the relay. After typing four digit password you must press the "OK" button (S8). At anytime you may press the "Cancel" key (S12 )to clear the input (e.g. when you enter any incorrect digit) The smart code lock has the feature to change the password too. For this enter a special password which is ’0000′, as soon as the system receives this special password it switches to change password mode. Here you need to enter the old password to gain permission, then enter the new password. The smart code lock also support power saving feature. The backlight of LCD turns off automatically when the system is idle for few seconds. The cool thing about this is that it uses PWM to control the brightness of LCD Backlight. So the dimming is very smooth and it is like those used in many mobile phones. You can fabricate the circuit on any general purpose PCB or breadboard.
The schematic and the BOM (Bill of Material is given below). To save you from lots of trouble we have made a quality PCB of the same! If you purchase the PCB, you just need to solder different components at their proper place on the PCB and you are ready to go. Burn the HEX file (given at the end of article) to the ATmega8 MCU using any suitable programmer and plug it into the 28 PIN IC Socket. After assembling the circuit power it on using a 12V 500ma Center Positive DC Wall adaptor (you can use one that is used for mini TVs or Game Consols or Your DSL Modem). Adjust the variable resistor RV1 (just below the LCD module, on the left side, yes the blue thing!) until the LCD Shows some text. The firmware source code is written in a professional was that may seems confusing to a n00b programmer. The thing is that every piece of related functions are stored in a separate source files. That means the the project is composed of several ‘C’ source file. Each C file has set of related functions (like LCD Interfacing Routines or EEPROM Access).
You must use AVR Studio as a project manager and WinAVR as compiler. Both the software must be installed in your PC. In the project folder their is a file with name "code_lock.aps", this is the main AVR Studio Project file. Load it in AVR Studio. You can see the various files that are part of the project in the left hand pane as shown below. Double click any file to load in the editor. After a file has been loaded in editor you can view and change it. The highest level file which contains the main application logic is "code_lock.c". This file contains the main() function. The rest files are lower level files that provide service to the higher level files. If you want to customize the firmware you can easily do so by editing the file "code_lock.c", in most cases you do not have to touch the other C files. Building the Binary from the source code. You need to convert the high level human readable source code into machine language so that the AVR chip can execute it. The complete process of this conversion is called "Building" (yes, compilation is one of the steps of building).
After build is complete you get a file called "code_lock.hex" which is placed inside a folder called "default" inside the project folder. You just need to program this hex file to the ATmega8 MCU using any suitable programmer . You can build the project using the "Build Active Configuration" button as shown above. You can also hit F7 button or Select Build from Build Menu. The Fuse bits must be set as follows. Consult your programmer software for more info. Please note that the above is default for ATmega8, so if you purchased a new chip then you do not need to change them. If you are new to AVR Studio and WinAVR Please read the following article carefully. We have made a high quality PCB complete with solder mask, component layout, tinning (for perfect soldering) on a FR4 (highest quality) material. You can purchase the same from our store. Your purchase help us create more interesting tutorials like this one and keep this site running. You can purchase the PCB from the following link