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Circuit. Fig. 3 shows the circuit diagram of the automatic water level indicator cum controller. It is built around an Arduino Uno board (MOD1), three LEDs, a 5V SPDT relay, and other components.
LCD Display (Optional) – Displays soil moisture level and pump status. 🔹 Components Used. 8051 Microcontroller (AT89S52 / AT89C51) Soil Moisture Sensor. Relay Module. Water Pump. Power Supply Circuit ...
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