Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller, an SN754410 motor driver, two rotary potentiometers, two LEDs (red and green), two resistors, a DC motor, and a 12V battery. The circuit is designed to control the DC motor using the motor driver and potentiometers, and to indicate status using the LEDs.

Component List

1. 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

2. SN754410

   • Description: Quadruple Half-H Driver.
   • Pins: 1,2 Enable, 1 In, 1 Out, GND, 2 Out, 2 In, VCC Motor, VCC Logic, 4 In, 4 Out, 3 Out, 3 In, 3,4 Enable

3. LED: Two Pin (red)

   • Description: Red LED.
   • Pins: cathode, anode

4. LED: Two Pin (green)

   • Description: Green LED.
   • Pins: cathode, anode

5. Rotary Potentiometer

   • Description: Variable resistor with 10k Ohms resistance.
   • Pins: leg1, wiper, leg2

6. DC Motor

   • Description: Direct current motor.
   • Pins: pin 1, pin 2

7. Resistor (330 Ohms)

   • Description: Fixed resistor with 330 Ohms resistance.
   • Pins: pin1, pin2

8. Battery 12V

   • Description: 12V power source.
   • Pins: -, +

Wiring Details

Arduino UNO

• 5V connected to:

  • Rotary Potentiometer (leg2)
  • SN754410 (VCC Logic)
  • Rotary Potentiometer (leg1)

• GND connected to:

  • Rotary Potentiometer (leg1)
  • SN754410 (GND)
  • LED: Two Pin (green) (cathode)
  • LED: Two Pin (red) (cathode)
  • Battery 12V (-)
  • SN754410 (GND)
  • Rotary Potentiometer (leg2)

• D6 connected to:

  • SN754410 (1,2 Enable)

• D2 connected to:

  • SN754410 (1 In)

• D7 connected to:

  • SN754410 (2 In)

• D13 connected to:

  • Resistor (pin1)

• D12 connected to:

  • Resistor (pin1)

• A0 connected to:

  • Rotary Potentiometer (wiper)

• A1 connected to:

  • Rotary Potentiometer (wiper)

SN754410

• VCC Logic connected to:

  • Arduino UNO (5V)
  • Rotary Potentiometer (leg2)
  • Rotary Potentiometer (leg1)

• GND connected to:

  • Rotary Potentiometer (leg1)
  • Arduino UNO (GND)
  • LED: Two Pin (green) (cathode)
  • LED: Two Pin (red) (cathode)
  • Battery 12V (-)
  • SN754410 (GND)
  • Rotary Potentiometer (leg2)

• 1,2 Enable connected to:

  • Arduino UNO (D6)

• 1 In connected to:

  • Arduino UNO (D2)

• 1 Out connected to:

  • DC Motor (pin 1)

• 2 Out connected to:

  • DC Motor (pin 2)

• 2 In connected to:

  • Arduino UNO (D7)

• VCC Motor connected to:

  • Battery 12V (+)

LED: Two Pin (red)

• cathode connected to:

  • SN754410 (GND)
  • Arduino UNO (GND)
  • Battery 12V (-)
  • Rotary Potentiometer (leg2)

• anode connected to:

  • Resistor (pin2)

LED: Two Pin (green)

• cathode connected to:

  • SN754410 (GND)
  • Arduino UNO (GND)
  • Battery 12V (-)
  • Rotary Potentiometer (leg2)

• anode connected to:

  • Resistor (pin2)

Rotary Potentiometer (1)

• leg1 connected to:

  • Arduino UNO (5V)
  • SN754410 (VCC Logic)
  • Rotary Potentiometer (leg2)

• wiper connected to:

  • Arduino UNO (A0)

• leg2 connected to:

  • Arduino UNO (GND)
  • SN754410 (GND)
  • LED: Two Pin (green) (cathode)
  • LED: Two Pin (red) (cathode)
  • Battery 12V (-)
  • Rotary Potentiometer (leg1)

Rotary Potentiometer (2)

• leg1 connected to:

  • Arduino UNO (5V)
  • SN754410 (VCC Logic)
  • Rotary Potentiometer (leg2)

• wiper connected to:

  • Arduino UNO (A1)

• leg2 connected to:

  • Arduino UNO (GND)
  • SN754410 (GND)
  • LED: Two Pin (green) (cathode)
  • LED: Two Pin (red) (cathode)
  • Battery 12V (-)
  • Rotary Potentiometer (leg1)

DC Motor

• pin 1 connected to:

  • SN754410 (1 Out)

• pin 2 connected to:

  • SN754410 (2 Out)

Resistor (1)

• pin1 connected to:

  • Arduino UNO (D13)

• pin2 connected to:

  • LED: Two Pin (green) (anode)

Resistor (2)

• pin1 connected to:

  • Arduino UNO (D12)

• pin2 connected to:

  • LED: Two Pin (red) (anode)

Battery 12V

• - connected to:

  • Arduino UNO (GND)
  • SN754410 (GND)
  • LED: Two Pin (green) (cathode)
  • LED: Two Pin (red) (cathode)
  • Rotary Potentiometer (leg2)

• + connected to:

  • SN754410 (VCC Motor)

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)