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, […]
Sensors
Difference Between Photodiode, Phototransistor and Photoresistor
In the field of electronics and optoelectronics, light-sensitive devices play a crucial role in converting light signals into electrical signals. Among the most widely used light sensors are the Photodiode, Phototransistor, and Photoresistor (also known as Light Dependent Resistor or LDR). Though they all respond to light, their construction, working principles, advantages, disadvantages, and applications […]
Photodiode – Symbol, Construction, Working, Types and Applications
Photodiode is a crucial component in modern electronics, enabling devices to detect and respond to light. From remote controls and light meters to solar panels and advanced optical communication systems, photodiodes play a silent but powerful role in shaping how we interact with technology. In this article, we’ll explore everything you need to know about […]
Phototransistor – Construction, Working, Types and Applications
A phototransistor is a semiconductor device that combines the properties of a photodiode and a transistor. It is sensitive to light and provides amplified electrical output based on the light intensity incident on its base region. Phototransistors play a vital role in optoelectronic applications such as light sensing, encoders, switches, and signal transmission, owing to […]
Piezoelectric Transducer – Construction, Working and Applications
The term “Piezo” in Piezoelectric Transducer originates from the Greek word piezein, meaning “to press” or “to squeeze.” This etymology reflects the fundamental principle of piezoelectricity—a phenomenon in which mechanical pressure generates an electrical voltage. Piezoelectric transducers (sensor / Actuator) harness this effect to convert mechanical energy (such as pressure, force, vibration, or acceleration) into electrical […]
BME680 and ESP8266 Based Indoor Air Quality Monitoring System
Monitoring the air, we breathe indoors is becoming increasingly important, especially in urban environments where pollution levels can impact our health. In this project, we’ll build a smart Indoor Air Quality Monitoring System using the BME680 environmental sensor, ESP8266 Wi-Fi module, and Blynk IoT platform. This compact setup allows real-time tracking of temperature, humidity, barometric […]