Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as an L298N DC motor driver, a Peltier module, a water pump, a fan, a DC power source, an Arduino Nano, a rotary potentiometer, resistors, a toggle switch, an LED, a 12V single-channel relay, a temperature sensor (LM35), and an electrolytic capacitor. The circuit is designed to control and monitor various devices using an Arduino Nano microcontroller.

Component List

1. L298N DC Motor Driver

   • Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB
   • Description: Motor driver for controlling DC motors.

2. Peltier Module

   • Pins: Negative, Positive
   • Description: Thermoelectric cooler for heating and cooling applications.

3. Water Pump

   • Pins: VCC, GND
   • Description: Pump for circulating water.

4. Fan

   • Pins: GND, 5V
   • Description: Cooling fan.

5. DC Power Source

   • Pins: Ground, Positive
   • Description: Provides DC power to the circuit.

6. Arduino Nano

   • Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK
   • Description: Microcontroller for controlling the circuit.

7. Rotary Potentiometer

   • Pins: leg1, wiper, leg2
   • Description: Variable resistor for adjusting resistance.
   • Properties: Resistance: 10,000 Ohms

8. Resistor

   • Pins: pin1, pin2
   • Description: Fixed resistor.
   • Properties: Resistance: 10,000 Ohms

9. Toggle Switch

   • Pins: L1, COM, L2
   • Description: Switch for toggling connections.

10. LED: Two Pin (red)

    • Pins: cathode, anode
    • Description: Light-emitting diode.

11. 12V Single Channel Relay

    • Pins: NC, COM, NO, IN, GND, VCC
    • Description: Relay for switching high-power devices.

12. Temperature Sensor (LM35)

    • Pins: +Vs, Vout, GND
    • Description: Sensor for measuring temperature.

13. Electrolytic Capacitor

    • Pins: -, +
    • Description: Capacitor for filtering and smoothing.
    • Properties: Capacitance: 0.0000022 Farads

Wiring Details

L298N DC Motor Driver

• OUT1 connected to OUT4 and Negative of Peltier Module.
• OUT2 connected to OUT3 and Positive of Peltier Module.
• 12V connected to COM of 12V Single Channel Relay and Positive of DC Power Source.
• GND connected to GND of Water Pump, leg1 of Rotary Potentiometer, - of Electrolytic Capacitor, GND of Temperature Sensor (LM35), GND of Fan, pin1 of Resistor, GND of 12V Single Channel Relay, GND of Arduino Nano, and Ground of DC Power Source.
• 5V connected to VIN of Arduino Nano.
• ENA connected to ENB and D11/MOSI of Arduino Nano.
• IN1 connected to IN4 and D10 of Arduino Nano.
• IN2 connected to IN3 and D9 of Arduino Nano.

Peltier Module

• Negative connected to OUT1 and OUT4 of L298N DC Motor Driver.
• Positive connected to OUT2 and OUT3 of L298N DC Motor Driver.

Water Pump

• GND connected to GND of L298N DC Motor Driver.
• VCC connected to 5V of Fan and NO of 12V Single Channel Relay.

Fan

• GND connected to GND of L298N DC Motor Driver.
• 5V connected to VCC of Water Pump.

DC Power Source

• Ground connected to GND of L298N DC Motor Driver.
• Positive connected to 12V of L298N DC Motor Driver.

Arduino Nano

• VIN connected to 5V of L298N DC Motor Driver.
• GND connected to GND of L298N DC Motor Driver.
• D11/MOSI connected to ENA and ENB of L298N DC Motor Driver.
• D10 connected to IN1 and IN4 of L298N DC Motor Driver.
• D9 connected to IN2 and IN3 of L298N DC Motor Driver.
• D7 connected to IN of 12V Single Channel Relay.
• D8 connected to pin1 of Resistor and L1 of Toggle Switch.
• 5V connected to COM of Toggle Switch, leg2 of Rotary Potentiometer, + of Electrolytic Capacitor, +Vs of Temperature Sensor (LM35), VCC of 12V Single Channel Relay.
• A1 connected to Vout of Temperature Sensor (LM35).
• A0 connected to wiper of Rotary Potentiometer.
• D13/SCK connected to anode of LED.

Rotary Potentiometer

• leg1 connected to GND of L298N DC Motor Driver.
• wiper connected to A0 of Arduino Nano.
• leg2 connected to COM of Toggle Switch.

Resistor

• pin1 connected to L1 of Toggle Switch.
• pin2 connected to GND of Arduino Nano.

Toggle Switch

• L1 connected to pin1 of Resistor.
• COM connected to leg2 of Rotary Potentiometer.
• L2 not connected.

LED: Two Pin (red)

• anode connected to D13/SCK of Arduino Nano.
• cathode connected to pin2 of Resistor.

12V Single Channel Relay

• NC not connected.
• COM connected to 12V of L298N DC Motor Driver.
• NO connected to VCC of Water Pump and 5V of Fan.
• IN connected to D7 of Arduino Nano.
• GND connected to GND of L298N DC Motor Driver.
• VCC connected to 5V of Arduino Nano.

Temperature Sensor (LM35)

• +Vs connected to 5V of Arduino Nano.
• Vout connected to A1 of Arduino Nano.
• GND connected to GND of L298N DC Motor Driver.

Electrolytic Capacitor

• - connected to GND of L298N DC Motor Driver.
• + connected to COM of Toggle Switch.

Documented Code

Arduino Nano 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)

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and documented code. Each component is described, and its connections are detailed to ensure proper assembly and functionality of the circuit.