Simple Power Strip Surge Protector Circuit is like hero for our plugs, they help protect our devices from big shock of electricity called power surge or spike. Also, this surge can come when storm happen or when other machine turn ON or OFF. Inside power strip a special part called MOV take this extra electricity […]
Security and Protection
Simple 2 LED Battery Status Indicator Circuit
This Simple 2 LED Battery Status Indicator Circuit work like gas meter but for battery, as it uses LED lights to tell how much power battery still have. One light mean battery is full another light mean half power and last light mean time to charge. Also, it use small parts like resistors, Zener diodes […]
Simple Entrance Alarm Circuit
This Simple Entrance Alarm Circuit protects a door or entryway; it produces a loud sound when someone passes through an invisible IR light beam. Furthermore, it works good at day and night by not giving much wrong alarm; also the circuit is simple and good for hobby people during nighttime. Circuit Working: Parts List: Components […]
Smoke Alarm Circuit
To begin with, this smoke alarm circuit works like a house with a sensitive “nose,” because it detects smoke in the air and when it senses smoke, it immediately triggers a loud alarm. In addition, the alarm can be a buzzer, a blinking light or any other alert device that activates to warn people. Furthermore, […]
Simple Contactless 220V Phase Detector Circuit using IC 4017
In this post we will see how to make Simple Contactless 220V Phase Detector Circuit using IC 4017, as this small tool help to check wire or cable if current is inside or not without touching it. Also, this circuit is very useful for electrician to find problem in big electric system; if current is […]
Simple Shadow Detector Security Alarm Circuit
This Simple Shadow Detector Security Circuit is like one guard with very sharp eyes, which uses one light sensor like photodiode to look shadow in one place. If something stop the light and make shadow, then the circuit think someone is there and start an alarm; alarm can be loud sound, blinking light or something […]