1 The Robot control using the wireless communication and the serial communication

RFID Based Access Control System using 8051

In this project, we are going to build an RFID Based Access Control System using 8051 Micro Controller . The same system can be named like RFID based door lock or RFID based access management system. If you have been to big hospitals or companies, you might have seen how they used RFID based locks to restrict access to certain areas. In hospitals, only hospital staff with approved RFID tags can access Intensive Care Unit and such restricted areas. So let’s begin to build the system. Project Description A RFID based Door Lock or Access Control System is based on some simple concepts. We store a set of RFID card data in our system, say 3 or 10 RFID card data. When the person with the right RFID card (compatible to data preloaded in our program/system) come and swipes his RFID tag, access will be granted. When the person with the wrong RFID card (whose data is not loaded in our system) swipes his RFID tag, access will be denied. I hope you understand the system concept of RFID based...

Introduction To Smart Wi-Fi

We need faster tools and media to prove our ideas, and this is where ready-to use modules like Smart Wi-Fi enter. Fig. 1 shows the top side of Smart Wi-Fi module. Fig. 1: Smart Wi-Fi module Fig. 2: Block diagram of the introduction of Smart Wi-Fi The module is low-cost and versatile; all a developer needs is a USB cable and it is ready to work. For software developers, working with hardware is always a pain, and this is one of the biggest reasons why many ideas never exit a computer. Smart Wi-Fi enables making a product quickly and reliably. With open software resources and hardware data, moving to the final product after the proof of concept is also easy. One of the major aims for writing this article is to show the versatility of this product and show how quick the development can be. In this article a few tests with Smart Wi-Fi are discussed, which show the applicability of this module for development of the Internet of Things (IoT) products. Fig. 3: C...

Astable Multivibrator using 555 Timer IC

An astable multivibrator can be designed using different types of components, say using transistors (and associated components) alone or by using op amps (and associated components). In this article, we are designing an Astable Multivibrator using 555 Timer IC. If you are wondering what all are the practical applications of an astable multivibrator, lets begin by seeing a few. One of the most common application for an astable multivibrator is to generate time delays . Let’s say you want to turn an LED “ ON ” for 1 second and keep it “ OFF ” for 0.5 seconds, then an astable multivibrator is the best circuit you could use to build this application. Unlike the monostable multivibrator, this circuit does not require any external trigger to change the state of the output, hence the name free-running. Before going to make the circuit, make sure your 555 IC is working. For that go through the article: How to test a 555 IC for working An astable multivibrator can be produced by adding...

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