DIY Parking Sensor Circuit using IC 555 and IC LM324 is smart device as it helps driver while parking a car. It finds nearby things that can block the way. It has two parts: Transmitter Circuit: which sends IR light using IR LED around the car. Receiver Circuit: which gets back the IR light if […]
Sensors and Detectors
Understanding Photosensitive Devices Circuits
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 also called photoresistor, LDR or photoconductive cell. It is variable resistor that changes with light. In dark it has […]
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 […]