This circuit is for Automatic 12V Battery Charger Circuit with SCR Cutoff, first it charges the battery and then it stops charging when the battery becomes full. Also, the circuit uses simple parts like transformer, diodes, SCR, resistor and capacitor and we can easily find these parts in market or online. So, this circuit protects […]
Security and Protection
Overcurrent Protection Circuit using Transistor and FET
This circuit shows about FET overload current protection using transistor and MOSFET. If the load draws too much current or the output gets short-circuited then this Overcurrent Protection Circuit using Transistor and FET can help you. The main purpose of this circuit is to protect load from high current, like when current increases above limit […]
Digital Code Lock Circuit using IC 4017
Security plays a very important role in todays world, therefore electronic code locks are very useful. This Digital Code Lock Circuit using IC 4017 is a simple. It uses push buttons, diodes, resistors, capacitor and IC CD 4017 . Moreover, it is low cost and easy to build and it works on 9V power supply. […]
Laser Light Alarm Circuit using Arduino
This article is for simple Laser Light Alarm Circuit using Arduino. A laser light shines on an LDR. When someone blocks the laser beam, the LDR changes its value. Arduino reads this change and turns ON the buzzer to make alarm sound. A reset button stops the alarm. The system is low cost and easy […]
Laser Security Alarm Circuit using LDR and BC547 Transistors
This project is for Laser Security Alarm Circuit using LDR and BC547 Transistors. It uses LDR, two BC547 transistors, one diode and a buzzer. When laser light breaks an alarm rings. Circuit is cheap and very easy to build. Good for door security, box security and drawer protection. Circuit Working: Parts List: Component Value Quantity […]
Women Safety Alarm Circuit using GPS GSM NodeMCU
This article is for Women Safety Alarm Circuit using GPS GSM NodeMCU. It uses NodeMCU ESP8266 board as brain. GPS module give location. GSM module send SMS to family. One push button used to send alert. Circuit Coding: Coding Explanation: Circuit Working: Parts List: Components Quantity NodeMCU ESP8266 Board 1 GPS Module (NEO-6M) 1 GSM […]