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The AVR 8535 microcontroller and its new version ATmega8535 are versatile, high-performance but low-cost chips. This article series covers typical applications of this processor...

Mobile phone ring tones sound like real audio recordings. It’s not because of the way the melodies are composed, but the protocol behind playing...

A line follower robot with pick-and-placement capabilities is commonly used in manufacturing plants. These move on a specified path to pick the components from...

Conventionally, wireless-controlled robots use RF circuits,which have the drawbacks of limited working range, limited frequency range and limited control. Use of a mobile phone...

In environments like factories, power plants and transformers in electricity substations, controlling temperature to a safe value is important. Supervisory and control systems are...

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...

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

Here is a microcontroller based wireless equipment controller that can switch on or switch off up to four devices at a desired time interval...

As the sources of conventional energy deplete day by day, resorting to alternative sources of energy like solar and wind energy has become need...

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...