This Arduino Entry Exit Monitoring Circuit counts people while entering and leaving place, it uses Arduino UNO R4 WiFi board. Two IR sensors detect people and two servo motors control entry and exit gates and then sends crowd count to Arduino IoT Cloud. Hence, this help us know how many people are inside anytime. Arduino […]
Security and Protection
Arduino with Non Contact Liquid Sensor Circuit
An Arduino with a Non-Contact Liquid Sensor Circuit detects water or other liquids without touching them; therefore, it functions as a contactless sensor. Also, it works on capacitance change near container wall and sensor sense water inside plastic or glass without direct contact. Moreover, it is safe, easy and clean project one should give it […]
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, therefore, we cannot always keep our eye on our luggage. So this small Luggage Safety Alarm Circuit using IC LM358 is a solution which help to protect our bag, as it uses piezo sensor and […]
Digital Display AC Line Tester Circuit
The Digital Display AC Line Tester Circuit is a compact electronic device that detects the presence of mains AC voltage without direct contact, it operates wirelessly, making it a safe and convenient mains voltage tester. When the sensing probe comes near a live AC wire then the circuit detects the field and shows the count […]
Simple Wire Loop Security Alarm Circuit
A simple wire loop alarm is a small security circuit that uses a thin wire as a sensor loop and if someone cuts or opens the loop, the buzzer sounds. Also, it works on 9V battery, needs few parts, is cheap and easy to make. Circuit Working: Parts List: Components Values Qty Resistors 4.7M 1/4 […]
Buzzer Alert at 0°C Indicator Circuit
In winter season, water and surrounding air can go below zero degree and at that time it is useful to have a small alarm which tells us when temperature goes near freezing point. This Buzzer Alert at 0°C Indicator Circuit uses thermistor sensor, one op-amp IC and a piezo buzzer to make sound alarm when […]