A tachometer measures how fast a motor shaft or disk rotates and it displays the speed in RPM (revolutions per minute). This article for Measuring RPM with a Tachometer Circuit teaches us how simple tachometer circuit made, how it work and how to build it. Also, tachometers play an important role in industries, automobiles and […]
Sensors and Detectors
Understanding Photosensitive Devices Circuits
Light is present all around us and photosensitive devices can feel this light, as these are very useful electronic components which change their action when light falls on them. We use these devices in automatic lights, alarms and many other electronic circuits. In this article, for Understanding Photosensitive Devices Circuits we will learn about their […]
Simple Short Circuit Detection and Alert System
Simple Short Circuit Detection and Alert System is very important in power system, as it stop damage when short circuit happen. Short happen when positive and negative wire get touch and this make big current flow and can break parts or burn wire. Furthermore, circuit uses 2 transistor, buzzer and LED to find and show […]
Building an Auto Street Light Circuit using IC 741 and Transistor
This post talks about Building an Auto Street Light Circuit using IC 741 and Transistor, as it turns ON at night and OFF at day. Furthermore, this circuit is simple and saves energy and it uses relay to control light, LDR to sense light, BC547 transistor drives relay and IC 741 works as a comparator. […]
Simple Flame Sensor Circuit using Arduino
Flame sensor is very important for many uses like industry machines, safety check and fire alarm. So in this post for Simple Flame Sensor Circuit using Arduino shows how to connect flame sensor to Arduino to find fire; also this project is cheap and works well for real-life fire detection. Arduino Code: Code for Flame […]
Building an LDR Comparator Circuit using IC LM339
Building an LDR Comparator Circuit using IC LM339 is useful and important in many electronic jobs like sensing and control, also using LDR, resistors, LED and LM339 IC we can make a simple circuit to check light level and show light change. LDR works like light sensor and its resistance changes when light changes and […]