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LM567 Tone Decoder IC Features, Datasheet and Applications

The post discuses the main specifications, datasheet and working principle of the IC LM567, which is a precise phase-locked loop with synchronous AM lock detection and power output device. In simpler terms the IC LM567 IC is a tone decoder chip which is designed basically for recognizing a specified frequency band, and activating the output … Read moreLM567 Tone Decoder IC Features, Datasheet and Applications

Videos – Circuit Test Results

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Bipolar Junction Transistor (BJT) – Construction, and Operational Details

How Bipolar Junction Transistor BJTs Evolved During 1904–1947, the vacuum tube was unquestionably the electronic device of great curiosity and growth. In 1904, the vacuum-tube diode was launched by J. A. Fleming. Soon afterwards, in 1906, Lee De Forest enhanced the device with a third feature, known as the control grid, producing the first amplifier, and … Read moreBipolar Junction Transistor (BJT) – Construction, and Operational Details

Understanding Amplifier Circuits

In general, an amplifier can be defined as a circuit designed to boost an applied low power input signal into a high power output signal, as per the specified rating of the components. Although, the basic function remains the same, amplifiers could be classified into different categories depending on their design and configurations. Circuits for … Read moreUnderstanding Amplifier Circuits

Pressure Cooker Whistle Counter Circuit

This circuit is designed to sense the whistles from a pressure cooker and count the number over a digital display. The system relieves the user from the stress of constantly monitoring the cooker and from manually counting the whistles. The idea was requested by Mr. P.K. Bajpai Design Concept In many of the Asian countries … Read morePressure Cooker Whistle Counter Circuit

2 Simple Motion Detector Circuits using PIR

PIR with delay ON alarm

The post discuses two simple motion detector circuits using op amp and transistor. We also discuss the pinout details of the standard passive infrared (PIR) sensor RE200B. The first circuit uses an op amp, while the second design works with a single transistor and relay for detecting the IR radiation from a moving human body … Read more2 Simple Motion Detector Circuits using PIR

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