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 […]
Security and Protection
Home »
Luggage Safety Alarm Circuit using IC LM358
Today security is big problem everywhere. Many time thief try to open bag or suitcase in bus, train or station. We cannot always watch our luggage. This small Luggage Safety Alarm Circuit using IC LM358 help to protect our bag. It uses piezo sensor and LM358 to sense vibration. When someone touches or try to […]
Simple Wire Loop Security Alarm Circuit
Simple wire loop alarm is small security circuit. It uses thin wire as sensor loop. If loop is cut or opened the buzzer will sound. It works on 9V battery, needs few parts, is cheap and easy to make. Circuit Working: Parts List: Component Specification Qty Resistors 4.7M 1/4 watt 1 100k 1/4 watt 1 […]
Simple Dark Sensor Circuit for Security using IC 555 timer
Simple Dark Sensor Circuit for Security using IC 555 timer is useful project for security. It senses low light and turns ON the buzzer or light. It is used for LDR as light sensing. Circuit is good for night light and alert system. The circuit have parts like 555 IC, LDR, resistors, capacitor and buzzer […]
Simple 555 Timer Based Animal Repeller Circuit
Simple 555 Timer Based Animal Repeller Circuit is small device to keep animals away. It make high sound which animals do not like and humans mostly do not hear it. Main part is IC 555 timer which make high frequency sound. Sound is around 15 kHz to 120 kHz (ultrasonic). This circuit is easy to […]
Build Our Own Solder Fume Extractor Circuit
Soldering make bad smoke which is not good for health. So every work table need good smoke remover. To Build Our Own Solder Fume Extractor Circuit uses few easy parts to remove bad smoke. It uses BC547 transistor, small DC fan, preset resistor, capacitor and NTC thermistor to make air clean and safe. NTC thermistor […]