A thermistor is a temperature-sensitive passive electronic component whose resistance changes significantly with temperature. The term thermistor is derived from Thermally sensitive resistor. Unlike standard resistors whose resistance remains nearly constant over temperature, thermistors are designed to exhibit large, predictable resistance variations with temperature changes. Thermistors are widely used in: Temperature measurement and control Over-temperature […]
Temperature monitoring is a fundamental requirement in modern electronic systems, ranging from consumer appliances and industrial equipment to power electronics and laboratory instruments. An LED temperature display circuit using LM3915 and a thermistor offers a simple, reliable, and visually intuitive way to indicate temperature variations without the complexity of microcontrollers or digital displays. This circuit […]
A Hall effect transducer is a sensor that detects a magnetic field and converts it into a proportional electrical signal using the Hall effect phenomenon. It is widely used for current sensing, position sensing, speed detection, proximity sensing, and magnetic field measurement in industrial, automotive, and consumer electronic systems. Unlike conventional mechanical or contact-based sensors, […]
A Motion Sensor Light is an automatic lighting system that turns ON when it detects movement in its range and switches OFF after a certain period of inactivity. This system is widely used for energy conservation, security, and convenience. The circuit described here uses a PIR (Passive Infrared) sensor, a BC547 transistor, a relay, and […]
Understanding the common electrical sensors in healthcare and other medical devices is the first step toward appreciating the role electronics play in healthcare. This article explains the types, working principles, and applications of common electrical sensors used in healthcare in a detailed and easy-to-understand manner. Walk into any hospital today, and you will hear the […]
A clap switch circuit is a popular DIY electronics project that lets you control an electronic device by clapping your hands. The circuit uses the sound of a clap as a trigger to turn the device ON or OFF. It finds wide use in home automation, interactive projects, and temporary lighting solutions. In this article, […]