Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to interface various components with an Arduino Mega 2560 microcontroller. The circuit includes input devices such as rotary potentiometers and push switches, output devices like servos and an LCD display, a Bluetooth module (HC-05), and an IR sensor (FC-51). The circuit is powered by the Arduino's 5V output and includes a common ground net connecting all components. The LCD display is interfaced with the Arduino through digital pins for data and control signals. Servos are controlled via PWM signals from the Arduino. The HC-05 Bluetooth module communicates with the Arduino through serial communication, and the IR sensor is connected to a digital input pin for detection purposes.

Component List

Rotary Potentiometer

• Description: A variable resistor with three terminals: two end terminals and one wiper terminal.
• Properties: 10,000 Ohms resistance.

Push Switches (4x)

• Description: Momentary push-button switches with two terminals: input and output.

Sensor FC-51 IR

• Description: An infrared sensor module with digital output.

HC-05 Bluetooth Module

• Description: A Bluetooth module with serial communication capability.

LCD Display 16x2

• Description: A 16x2 character LCD display with backlight.

Servos (4x)

• Description: Rotary actuators with three terminals: ground, power, and control pulse.

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560 with numerous digital and analog I/O pins.

Resistor

• Description: A passive two-terminal electrical component that implements electrical resistance.
• Properties: 200 Ohms resistance.

Wiring Details

Rotary Potentiometer

• leg1 connected to Arduino Mega 2560's 5V.
• wiper connected to LCD Display 16x2's VO.
• leg2 connected to common ground net.

Push Switches

• Input + of each switch connected to individual Arduino Mega 2560's digital pins (D10 PWM, D11 PWM, D12 PWM, D13 PWM).
• Output + of each switch connected to common ground net.

Sensor FC-51 IR

• OUT connected to Arduino Mega 2560's D8 PWM.
• GND connected to common ground net.
• VCC connected to Arduino Mega 2560's 5V.

HC-05 Bluetooth Module

• EN not connected.
• VCC connected to Arduino Mega 2560's 5V.
• GND connected to common ground net.
• TXD connected to Resistor (200 Ohms) then to common ground net.
• RXD connected to Arduino Mega 2560's D0 RX0.
• STATE not connected.

LCD Display 16x2

• LEDK, RW, VSS connected to common ground net.
• LEDA, VDD connected to Arduino Mega 2560's 5V.
• DB7 connected to Arduino Mega 2560's D22.
• DB6 connected to Arduino Mega 2560's D23.
• DB5 connected to Arduino Mega 2560's D24.
• DB4 connected to Arduino Mega 2560's D25.
• E connected to Arduino Mega 2560's D26.
• RS connected to Arduino Mega 2560's D27.
• VO connected to Rotary Potentiometer's wiper.

Servos

• gnd of each servo connected to common ground net.
• vcc of each servo connected to Arduino Mega 2560's 5V.
• pulse of each servo connected to individual Arduino Mega 2560's digital pins (D4 PWM, D5 PWM, D6 PWM, D7 PWM).

Resistor

• pin1 connected to HC-05's TXD.
• pin2 connected to common ground net.

Documented Code

Arduino Mega 2560 - sketch.ino

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

}

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

}

Arduino Mega 2560 - documentation.txt

No additional documentation provided for the code.

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This concludes the circuit documentation. The circuit is designed for modularity and ease of expansion, with the Arduino Mega 2560 at its core, providing ample I/O for various components and future enhancements.