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WiMAX Testing, Step by Step

Based on orthogonal frequency-division multiple-access (OFDMA) and multiple-input multiple-output (MIMO) technologies, WiMAX systems require specialised test equipment from design to deployment stage SHWETA DHADIWAL BAID Worldwide...

Industry-Grade Equipment For Academia

Engineers are created in labs. Hence it is essential to keep the lab equipment current and close to the real world to create engineers...

Stereo Headphone Amplifier

Here is an inexpensive circuit for a stereo amplifier to drive a low-impedance headphone set. The circuit uses a few cheap transistors (BC547 and...

MOBILE BUG

This handy, pocket-size mobile transmission detector (Mobile Bug) can sense the presence of an activated mobile phone from a distance of one and a-half...

FLYING SAUCER

This unidentified flying object (UFO) is nothing but an electronic toy depicting the fantacy. It comprises three separate sections, viz, rim flasher, dome flasher...

PARROT-SOUNDING AC DOOR BELL

Here is a mains-operated door-bell that produces parrot-like sweet voice without requiring any musical IC. The circuit is cheap and easy to construct. The...

Auto Reset Over/Under Voltage Cut-Out

This over/under voltage cut-out will save your costly electrical and electronic appliances from the adverse effects of very high and very low mains voltages. The...

Automatic Room Power Controller

An ordinary automatic room power control circuit has only one light sensor. So when a person enters,the room it gets one pulse and the...

Precision 1Hz clock Generator using Chip-On-Board

Usually the circuits for generation of 1Hz clock for applications in digital clock and counter circuits make use of ICs in conjunction with a...

Friendly Charger for Mobile Phones

Most mobile chargers do not have current/voltage regulation or short-circuit protection. These chargers provide raw 6-12V DC for charging the battery pack. Most of...