Microcontroller-Based Moving Message Display

LED-based moving-message displays are becoming popular for transmitting information to large groups of people quickly. These can be used indoors or outdoors. We can find such displays in areas like railway...

Secure Digital Access System using iButton

Access control forms a vital link in a security chain. Here we describe a secure digital access system using iButton that allows only authorised persons to access a restricted area. The iButton...

Wireless Equipment Control Using AT89C51

Here is a microcontroller based wireless equipment controller that can switch on or switch off up to four devices at a desired time interval set by the user in the transmitter....

PC-Based Wireless Control for Toy Car

Here we show how you can control a toy car through your PC’s serial port using a pair of ASK transmitter and receiver modules. The received signal is decoded by a...

Microcontroller-Based DC Motor Controller

Motion control plays a vital role in industrial automation. Manufacturing plants in industries like chemical, pharmaceutical, plastic and textile, all require motion control. And it may be a flat-belt application, flow...

Remote-Controlled 6-Camera CCTV Switcher

Closed-circuit television (CCTV) uses video cameras to transmit signals to specific monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point-to-point wireless...

Microcontroller-Based Serial Data Transfer To PC

Communication from or to a computer has become almost essential in our day-to-day lives. Though we can execute many programs within a computer itself, it will not be of much use...

RPM Counter Using Microcontroller AT89C4051

Counting the revolutions per minute (RPM) of motors—determining the motor speed— is essential in the field of industrial automation. It is useful especially for closed-loop control systems where proper action can...

RFID-Based Security System

A radio-frequency identification (RFID) based access-control system allows only authorised persons to enter a particular area of an establishment. The authorised persons are provided with unique tags, using which they can...

JOIN THE LED LIGHTING REVOLUTION

Light-emitting diodes (LEDs) produce a radically different type of lighting than what we are used to. Already in use in many architectural and commercial applications,these are now reaching our homes too.For...