This article is for simple Laser Light Alarm Circuit using Arduino. A laser light shines on an LDR and when someone blocks the laser beam, the LDR changes its value and then Arduino reads this change and turns ON the buzzer to make alarm sound. A reset button stops the alarm. Also, the system uses […]
Security and Protection
Laser Security Alarm Circuit using LDR and BC547 Transistors
This project is for Laser Security Alarm Circuit using LDR and BC547 Transistors, as it uses LDR, two BC547 transistors, one diode and a buzzer. When laser light breaks an alarm rings. Additionally, this circuit is cheap and very easy to build and is good for door security, box security and drawer protection. Circuit Working: […]
Solenoid Door Lock Circuit with Arduino
In this project we have used Solenoid Door Lock Circuit with Arduino, as Solenoid lock works like magnet latch and then Arduino control it using small signal. With few parts and simple wiring, we can create automatic locking system for our home or office, also its a very easy and very useful circuit and is […]
Railway Track Accident Prevention Circuit using Arduino
Railway accidents happen because obstacles come on railway track, because many trains cannot stop fast; therefore, this project uses Arduino Uno, ultrasonic sensor, relay and motor or servo to give warning or stop mechanism. The system checks distance and if object comes close, relay activates and motor moves barrier or alarm system, also this helps […]
IR Sensor Based Stick for Blind Circuit
This circuit turns a normal stick into a smart safety tool for blind users, as it helps blind person know if any object is near. Also, it uses an IR sensor, a transistor, a buzzer and a 5V regulator IC, here, the IR sensor detects objects that human eyes cannot see. Furthermore, this IR Sensor […]
Simple PIR Motion Detector Circuit
This simple and easy circuit uses a PIR sensor to detect human motion; when motion happens, PIR output goes high and this high signal turns ON an LED through a resistor. Also, this Simple PIR Motion Detector Circuit is easy to make and works with 12V supply. Circuit Working: Parts List: Components Value Quantity Resistors […]