Circuit Documentation

Summary

This circuit involves an Arduino Mega 2560 microcontroller interfaced with multiple pushbuttons, LEDs of different colors, a 7-segment display, a 74HC595 shift register, resistors, and a buzzer. The circuit is designed to demonstrate basic input and output operations, including button presses, LED control, and display management.

Component List

1. Pushbutton

   • Description: A simple pushbutton switch.
   • Pins: Pin 1 (in), Pin 2 (in), Pin 3 (out), Pin 4 (out)

2. Arduino Mega 2560

   • Description: A microcontroller board based on the ATmega2560.
   • Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, SDA, SCL, AREF

3. LED: Two Pin (red)

   • Description: A red LED.
   • Pins: Cathode, Anode

4. LED: Two Pin (blue)

   • Description: A blue LED.
   • Pins: Cathode, Anode

5. LED: Two Pin (yellow)

   • Description: A yellow LED.
   • Pins: Cathode, Anode

6. LED: Two Pin (green)

   • Description: A green LED.
   • Pins: Cathode, Anode

7. Resistor (220 Ohms)

   • Description: A resistor with a resistance of 220 Ohms.
   • Pins: Pin 1, Pin 2

8. Resistor (330 Ohms)

   • Description: A resistor with a resistance of 330 Ohms.
   • Pins: Pin 1, Pin 2

9. 74HC595

   • Description: An 8-bit serial-in, serial or parallel-out shift register with output latches.
   • Pins: Q0-Q7, GND, VCC, DS (DATA), OE (Enable), ST_CP (RCLK), SH_CP (SRCLK), MR (SRCLR), Q7' (QH)

10. 7 Segment Display (4 Digit)

    • Description: A 4-digit 7-segment display.
    • Pins: 1, A, F, 2, 3, B, G, 4, C, DP, D, E

11. Buzzer

    • Description: A simple buzzer.
    • Pins: PIN, GND

Wiring Details

Pushbutton

• Pushbutton 1

  • Pin 1 (in) -> Arduino Mega 2560 D2 PWM
  • Pin 2 (in) -> Arduino Mega 2560 D2 PWM
  • Pin 3 (out) -> Common GND
  • Pin 4 (out) -> Common GND

• Pushbutton 2

  • Pin 1 (in) -> Arduino Mega 2560 D3 PWM
  • Pin 2 (in) -> Arduino Mega 2560 D3 PWM
  • Pin 3 (out) -> Common GND
  • Pin 4 (out) -> Common GND

• Pushbutton 3

  • Pin 1 (in) -> Arduino Mega 2560 D4 PWM
  • Pin 2 (in) -> Arduino Mega 2560 D4 PWM
  • Pin 3 (out) -> Common GND
  • Pin 4 (out) -> Common GND

• Pushbutton 4

  • Pin 1 (in) -> Arduino Mega 2560 D5 PWM
  • Pin 2 (in) -> Arduino Mega 2560 D5 PWM
  • Pin 3 (out) -> Common GND
  • Pin 4 (out) -> Common GND

Arduino Mega 2560

• 5V -> 74HC595 VCC, 74HC595 MR (SRCLR)
• GND -> Common GND
• D2 PWM -> Pushbutton 1 Pin 1 (in), Pin 2 (in)
• D3 PWM -> Pushbutton 2 Pin 1 (in), Pin 2 (in)
• D4 PWM -> Pushbutton 3 Pin 1 (in), Pin 2 (in)
• D5 PWM -> Pushbutton 4 Pin 1 (in), Pin 2 (in)
• D6 PWM -> 7 Segment Display (4 Digit) Pin 1
• D7 PWM -> 7 Segment Display (4 Digit) Pin 4
• D8 PWM -> 74HC595 ST_CP (RCLK)
• D9 PWM -> 7 Segment Display (4 Digit) Pin 2
• D10 PWM -> 7 Segment Display (4 Digit) Pin 3
• D11 PWM -> 74HC595 DS (DATA)
• D12 PWM -> 74HC595 SH_CP (SRCLK)
• D13 PWM -> Resistor (220 Ohms) Pin 1
• D14/TX3 -> Resistor (220 Ohms) Pin 1
• D15/RX3 -> Resistor (220 Ohms) Pin 1
• D16 PWM/TX2 -> Resistor (220 Ohms) Pin 1
• D17 PWM/RX2 -> Resistor (220 Ohms) Pin 1

LED: Two Pin (red)

• Anode -> Resistor (220 Ohms) Pin 2
• Cathode -> Common GND

LED: Two Pin (blue)

• Anode -> Resistor (220 Ohms) Pin 2
• Cathode -> Common GND

LED: Two Pin (yellow)

• Anode -> Resistor (220 Ohms) Pin 2
• Cathode -> Common GND

LED: Two Pin (green)

• Anode -> Resistor (220 Ohms) Pin 2
• Cathode -> Common GND

Resistor (220 Ohms)

• Pin 1 -> Arduino Mega 2560 D13 PWM

• Pin 2 -> LED: Two Pin (red) Anode

• Pin 1 -> Arduino Mega 2560 D14/TX3

• Pin 2 -> LED: Two Pin (blue) Anode

• Pin 1 -> Arduino Mega 2560 D15/RX3

• Pin 2 -> LED: Two Pin (yellow) Anode

• Pin 1 -> Arduino Mega 2560 D16 PWM/TX2

• Pin 2 -> LED: Two Pin (green) Anode

• Pin 1 -> Arduino Mega 2560 D17 PWM/RX2

• Pin 2 -> Buzzer PIN

Resistor (330 Ohms)

• Pin 1 -> 74HC595 Q0

• Pin 2 -> 7 Segment Display (4 Digit) Pin A

• Pin 1 -> 74HC595 Q1

• Pin 2 -> 7 Segment Display (4 Digit) Pin B

• Pin 1 -> 74HC595 Q2

• Pin 2 -> 7 Segment Display (4 Digit) Pin C

• Pin 1 -> 74HC595 Q3

• Pin 2 -> 7 Segment Display (4 Digit) Pin D

• Pin 1 -> 74HC595 Q4

• Pin 2 -> 7 Segment Display (4 Digit) Pin E

• Pin 1 -> 74HC595 Q5

• Pin 2 -> 7 Segment Display (4 Digit) Pin F

• Pin 1 -> 74HC595 Q6

• Pin 2 -> 7 Segment Display (4 Digit) Pin G

74HC595

• VCC -> Arduino Mega 2560 5V
• GND -> Common GND
• MR (SRCLR) -> Arduino Mega 2560 5V
• OE (Enable) -> Common GND
• DS (DATA) -> Arduino Mega 2560 D11 PWM
• ST_CP (RCLK) -> Arduino Mega 2560 D8 PWM
• SH_CP (SRCLK) -> Arduino Mega 2560 D12 PWM
• Q0 -> Resistor (330 Ohms) Pin 1
• Q1 -> Resistor (330 Ohms) Pin 1
• Q2 -> Resistor (330 Ohms) Pin 1
• Q3 -> Resistor (330 Ohms) Pin 1
• Q4 -> Resistor (330 Ohms) Pin 1
• Q5 -> Resistor (330 Ohms) Pin 1
• Q6 -> Resistor (330 Ohms) Pin 1

7 Segment Display (4 Digit)

• Pin 1 -> Arduino Mega 2560 D6 PWM
• Pin 2 -> Arduino Mega 2560 D9 PWM
• Pin 3 -> Arduino Mega 2560 D10 PWM
• Pin 4 -> Arduino Mega 2560 D7 PWM
• Pin A -> Resistor (330 Ohms) Pin 2
• Pin B -> Resistor (330 Ohms) Pin 2
• Pin C -> Resistor (330 Ohms) Pin 2
• Pin D -> Resistor (330 Ohms) Pin 2
• Pin E -> Resistor (330 Ohms) Pin 2
• Pin F -> Resistor (330 Ohms) Pin 2
• Pin G -> Resistor (330 Oh