Soil Moisture Detection System
A Soil Moisture Detection System using Arduino, a soil moisture sensor, and a buzzer that sounds an alert when soil moisture is detected.
Description
The Soil Moisture Detection System is designed to monitor soil moisture levels using an Arduino and a soil moisture sensor. When the soil moisture sensor detects moisture in the soil, it sends a signal to the Arduino. The Arduino processes this signal and activates the buzzer to produce a sound alert, indicating that the soil has sufficient moisture. This project is useful for smart irrigation systems and plant care automation.
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- A rain alert system with an LCD display and buzzer, controlled by an 8051 microcontroller, is designed to detect rainfall and provide real-time notifications. The system uses a rain sensor to detect moisture or rainfall, and the microcontroller processes the sensor data. When rain is detected, the 8051 triggers a buzzer to alert the user audibly and displays the rain status on an LCD screen.
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A Visitor Counter automatically counts the number of people entering or leaving a room using an IR sensor. The count is displayed on a 16×2 LCD, and a buzzer can alert when a specific limit is reached. This project is widely used in shops, libraries, offices, and events to monitor occupancy. It demonstrates sensor interfacing, counting logic, and real-time display using Arduino.
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An AND gate can be built using BC547 NPN transistors, a common general-purpose transistor used in digital circuits.
The circuit represents both the inputs A & B for the AND gate and Output, Q, which also has a +5V supply to the collector of the first transistor, which is connected in series to the second transistor, and an LED is connected to the emitter terminal of the second transistor. The inputs A & B are connected to the base terminal of Transistor 1 and Transistor 2, respectively, and the output Q goes to the positive terminal LED.
₹190.00












