Photosensitive device works with light. When light hits the voltage or current changes. It can turn ON or OFF lamp, alarm or control system. They are used in auto lamp, sensors and safety circuits. Photocell: Photocell has special design. Light material is placed in zigzag between two metal contacts on ceramic base. Zigzag gives is […]
Sensors and Detectors
Simple Short Circuit Detection and Alert System
Simple Short Circuit Detection and Alert System is very important in power system. It stop damage when short happen. Short happen when positive and negative wire get touch. This make big current flow and can break parts or burn wire. Circuit uses 2 transistor, buzzer and LED to find and show short. If there is […]
Simple Flame Sensor Circuit using Arduino
Flame sensor is very important for many uses like industry machines, safety check and fire alarm. In this post for Simple Flame Sensor Circuit using Arduino shows how to connect flame sensor to Arduino to find fire. This project is cheap and works well for real-life fire detection. Coding: Code for Flame Sensor Digital (D0) […]
Simple Arduino Based Electromagnetic Field Detector Circuit
EMFs (electromagnetic fields) are invisible energy from electricity and lights which are natural and man made. Some EMFs are safe and some are bad if used too much for long time. We can use simple Arduino tool to find EMFs around us. Moving electric charge make EMFs. EMFs have two parts: electric field and magnetic […]
Simple Magnet Polarity Detector Circuit using Hall Effect Sensor
Simple Magnet Polarity Detector Circuit using Hall Effect Sensor is important for things like motor control, measuring magnetic field and for teaching. This article show how to use APX9141 Hall Effect sensor to make easy and working magnet polarity detector. Red and blue LEDs show magnet north and south poles and it gives simple visual […]
Simple Micro SD Card Data Logging Circuit with Arduino UNO
Accurate data logging is very important in electronics and data work. This project for Simple Micro SD Card Data Logging Circuit with Arduino UNO show how to use micro SD card, IC 7809 and LM35 sensor to make simple data logger. It saves temperature data to SD card and later we can check data for […]