Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various sensors, actuators, and display components. The components include a capacitive soil moisture sensor, a temperature sensor, a fan, a water pump, an LCD display, an LED light strip, a photocell (LDR), resistors, and an NPN transistor. The circuit is powered by an SMPS power supply.

Component List

Arduino UNO

• Description: Microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

Fan

• Description: 5V fan for cooling purposes.
• Pins: GND, 5V

Capacitive Soil Moisture Sensor V1.2

• Description: Sensor to measure soil moisture levels.
• Pins: GND, VCC, AOUT

16x2 I2C LCD

• Description: 16x2 character LCD display with I2C interface.
• Pins: GND, VCC, SDA, SCL

Temperature Sensor (TEMP)

• Description: Sensor to measure temperature.
• Pins: 5V, D3, GND

5V Mini Water Pump

• Description: Small water pump for irrigation.
• Pins: Positive pin, Negative pin

Photocell (LDR)

• Description: Light-dependent resistor to measure light intensity.
• Pins: Pin 0, Pin 1

Resistor (10k Ohms)

• Description: Resistor with 10k Ohms resistance.
• Pins: Pin1, Pin2

Resistor (200 Ohms)

• Description: Resistor with 200 Ohms resistance.
• Pins: Pin1, Pin2

LED Light Strips (Violet)

• Description: Violet LED light strips.
• Pins: VCC, GND

NPN Transistor (EBC)

• Description: NPN transistor with emitter, base, and collector pins.
• Pins: Emitter, Base, Collector

SMPS_LRS-100-12

• Description: Switched-mode power supply.
• Pins: L: Live, N: Neutral, GND, -V, +V

Wiring Details

Arduino UNO

• GND: Connected to GND of Fan, Capacitive Soil Moisture Sensor, Temperature Sensor, SMPS, Resistor (10k Ohms), and 16x2 I2C LCD.
• 5V: Connected to Pin 0 of Photocell, VCC of 16x2 I2C LCD, VCC of Capacitive Soil Moisture Sensor, and D3 of Temperature Sensor.
• A0: Connected to Pin 1 of Photocell and Pin2 of Resistor (10k Ohms).
• A1: Connected to AOUT of Capacitive Soil Moisture Sensor.
• A4: Connected to SDA of 16x2 I2C LCD.
• A5: Connected to SCL of 16x2 I2C LCD.
• D3: Connected to 5V of Fan.
• D5: Connected to Pin2 of Resistor (200 Ohms).
• D6: Connected to Positive pin of 5V Mini Water Pump.
• D9: Connected to 5V of Temperature Sensor.

Fan

• GND: Connected to GND of Arduino UNO.
• 5V: Connected to D3 of Arduino UNO.

Capacitive Soil Moisture Sensor V1.2

• GND: Connected to GND of Arduino UNO.
• VCC: Connected to 5V of Arduino UNO.
• AOUT: Connected to A1 of Arduino UNO.

16x2 I2C LCD

• GND: Connected to GND of Arduino UNO.
• VCC: Connected to 5V of Arduino UNO.
• SDA: Connected to A4 of Arduino UNO.
• SCL: Connected to A5 of Arduino UNO.

Temperature Sensor (TEMP)

• 5V: Connected to D9 of Arduino UNO.
• D3: Connected to 5V of Arduino UNO.
• GND: Connected to GND of Arduino UNO.

5V Mini Water Pump

• Positive pin: Connected to D6 of Arduino UNO.
• Negative pin: Connected to Emitter of NPN Transistor.

Photocell (LDR)

• Pin 0: Connected to 5V of Arduino UNO.
• Pin 1: Connected to A0 of Arduino UNO and Pin2 of Resistor (10k Ohms).

Resistor (10k Ohms)

• Pin1: Connected to GND of Arduino UNO.
• Pin2: Connected to Pin 1 of Photocell and A0 of Arduino UNO.

Resistor (200 Ohms)

• Pin1: Connected to Base of NPN Transistor.
• Pin2: Connected to D5 of Arduino UNO.

LED Light Strips (Violet)

• VCC: Connected to +V of SMPS.
• GND: Connected to Collector of NPN Transistor.

NPN Transistor (EBC)

• Emitter: Connected to Negative pin of 5V Mini Water Pump.
• Base: Connected to Pin1 of Resistor (200 Ohms).
• Collector: Connected to GND of LED Light Strips.

SMPS_LRS-100-12

• -V: Connected to GND of Arduino UNO.
• +V: Connected to VCC of LED Light Strips.

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)