Circuit Documentation

Summary

This circuit is designed to control multiple MG996R servo motors using an Adafruit 16-Channel 12-bit PWM Servo Driver, which is interfaced with an Arduino UNO microcontroller. The Arduino UNO also connects to an HC-05 Bluetooth Module for wireless communication capabilities. The entire system is powered by a 3.7V battery, which directly supplies power to the PWM Servo Driver and indirectly to other components through voltage regulation on the Servo Driver and Arduino UNO.

Component List

MG996R Servo Motor

• Description: A high-torque digital servo motor.
• Pins: GND, VCC, SIG

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13

Adafruit 16-Channel 12-bit PWM Servo Driver - I2C

• Description: An I2C PWM driver capable of controlling 16 servo motors.
• Pins: 5.0V, VCC, SDA, SCL, OE, GND, PWM0-PWM15, PWRIN

HC-05 Bluetooth Module

• Description: A Bluetooth module for wireless communication.
• Pins: Key, VCC, TXD, RXD, State, GND

3.7v Battery

• Description: A power source for the circuit.
• Pins: +, -

Wiring Details

MG996R Servo Motor

• GND: Connected to GND on the PWM Servo Driver.
• VCC: Connected to 5.0V on the PWM Servo Driver.
• SIG: Connected to one of the PWM outputs on the PWM Servo Driver (PWM0, PWM1, PWM2, PWM3, or PWM4).

Arduino UNO

• 5V: Supplies power to the VCC of the HC-05 Bluetooth Module and the VCC of the PWM Servo Driver.
• GND: Common ground for the HC-05 Bluetooth Module and the PWM Servo Driver.
• A4 (SDA): Connected to the SDA pin of the PWM Servo Driver for I2C communication.
• A5 (SCL): Connected to the SCL pin of the PWM Servo Driver for I2C communication.
• D0 (RX): Connected to the TXD pin of the HC-05 Bluetooth Module.
• D1 (TX): Connected to the RXD pin of the HC-05 Bluetooth Module.

Adafruit 16-Channel 12-bit PWM Servo Driver - I2C

• 5.0V: Provides power to the VCC pins of the MG996R servo motors.
• GND: Common ground for all MG996R servo motors and the 3.7V battery.
• SDA: Connected to A4 (SDA) on the Arduino UNO for I2C communication.
• SCL: Connected to A5 (SCL) on the Arduino UNO for I2C communication.
• PWRIN: Connected to the + pin of the 3.7V battery.
• PWM0-PWM4: Each connected to the SIG pin of a respective MG996R servo motor.

HC-05 Bluetooth Module

• VCC: Powered by the 5V pin of the Arduino UNO.
• GND: Connected to the common ground on the Arduino UNO.
• TXD: Connected to the D0 (RX) pin of the Arduino UNO.
• RXD: Connected to the D1 (TX) pin of the Arduino UNO.

3.7v Battery

• + (Positive): Connected to the PWRIN pin of the PWM Servo Driver.
• - (Negative): Connected to the GND pin of the PWM Servo Driver.

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:

}

Note: The provided code is a template and does not contain any functional code. It needs to be populated with the initialization and control logic for the PWM Servo Driver and the HC-05 Bluetooth Module.