• × LM741 Operational Amplifier IC  1 × ₨20
• × 13003 NPN Transistor  1 × ₨20
• × 24V Ultrasonic LED Humidifier with Power Adapter  1 × ₨1,700
• × Classic Train Play Set  1 × ₨480
• × Humidifier Floating Buoy  1 × ₨350
• × 3144 Hall Effect Sensor  1 × ₨40
• × Soil Moisture Sensor  1 × ₨150
• × SMD7805 Voltage Regulator  1 × ₨30
• × CD4518 Dual 4 Bit BCD Counter IC  1 × ₨30
• × XHM-452 Humidity and Temperature Controller (12V)  1 × ₨1,300
• × STC-3028 Humidity and Temperature Controller (12VDC)  1 × ₨2,500

Subtotal: ₨6,620

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