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Laser-based Intruder Alarm

This alarm circuit can be used to warn against trespass or unauthorised access in your premises. Its range can be extended further to protect the perimeter of a building from intrusion by using a cascade arrangement of multiple al...
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Electronic Glow-Worm

Here is a circuit that simulates the chirping and glow of a glow-worm bug.
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IPv6: The New Address

Until IPv6 completely supplants IPv4, a number of transition mechanisms are needed to enable IPv6-only hosts to reach IPv4 services and to allow isolated IPv6 hosts and networks to reach the IPv6 Internet over the IPv4 infrastruct...
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Electronic Heart

With this electronic heart glowing on and off, you are sure to steal the heart of that special someone. The circuit uses an NE555 timer wired in astable multivibrator mode. Its frequency of oscillations is determined by resistors ...
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Different Cameras, Different Applications

In todays world, you will take longer to think of an application than finding an accessory for the same. Think of a function and rest assured, you will be spoilt for choice regarding the devices to be used. A camera follows this t...
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Simulation Before Prototyping

As tech firms keep reducing product development cycles to stay competitive, simulation before going for a prototype is important to save time and improve product reliability—which ultimately results in cost savings. This article ...
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Digital Camera Adaptor

You need not be disappointed next time when your digital camera shows low battery indication during a picnic trip. Just plug this digital camera adaptor into the cigarette lighter outlet of your car and connect the camera to it. T...
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Embedded and cloud computing are coming together t...

Calsoft Labs, a wholly owned subsidiary of Europe’s leading Engineering and Technology Consulting group—ALTEN, provides services like embedded product engineering, software development and industrial design to product and technolo...
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Power Pulser

The idea behind this multipurpose power pulser is very simple. As shown in the circuit (Fig. 1), it uses a low-frequency oscillator to drive a voltage regulator. Timer chip LM555 (IC1) is wired as an astable multivibrator. Compone...
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PC Temperature Controller

Here is a simple temperature controller that turns your personnel computer (PC) off when the temperature of the PC increases beyond the optimal temperature value. Some of the larger integrated circuits become quite hot and if the ...
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Electronic Combination Lock

This 7-digit combination lock can be easily hard-wired for any combination that you choose. The circuit uses a 4-bit, divide-by-8 Johnson counter (IC1), ten pushbutton switches and npn transistor T1.
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EEPROM Interface for Beginners

Electronic systems today incorporate a number of peripheral ICs that have to communicate with each other and the outside world. To maximise hardware efficiencyand simplify circuit design, Philips developed a simple bidirectional t...
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Ethernet Interface for Automation Systems

Communication with remotely located automation systems is possible via the Internet. A physical communication port with a network is required for this communication. An Ethernet interface can be used for that purpose.
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