Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller, a Buck converter, a 7.4V power source, a pushbutton, multiple Servo Motor MG996R units, and an Adafruit 16-Channel 12-bit PWM Servo Driver. The circuit is designed to control multiple servo motors using the Arduino UNO, with power regulation provided by the Buck converter.

Component List

Arduino UNO

• Description: A 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

Buck Converter

• Description: A DC-DC converter that steps down voltage.
• Pins: IN+, IN-, OUT+, OUT-

7.4V Battery

• Description: A 7.4V power source.
• Pins: +, -

Pushbutton

• Description: A simple pushbutton switch.
• Pins: Pin 2, Pin 1, Pin 3, Pin 4

Servo Motor MG996R

• Description: A high-torque servo motor.
• Pins: PMW, VCC 5V, GND

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

• Description: A PWM driver for controlling up to 16 servos via I2C.
• Pins: 5.0V, VCC, SDA, SCL, OE, GND, PWM0, PWM1, PWM2, PWM3, PWM4, PWM5, PWM6, PWM7, PWRIN, PWM8, PWM9, PWM10, PWM11, PWM12, PWM13, PWM14, PWM15

Wiring Details

Arduino UNO

• 5V connected to VCC of Adafruit 16-Channel 12-bit PWM Servo Driver.
• GND connected to GND of Adafruit 16-Channel 12-bit PWM Servo Driver.
• Vin connected to OUT+ of Buck converter.
• A4 connected to SDA of Adafruit 16-Channel 12-bit PWM Servo Driver.
• A5 connected to SCL of Adafruit 16-Channel 12-bit PWM Servo Driver.
• GND connected to OUT- of Buck converter.
• GND connected to Pin 4 of Pushbutton.
• D13 connected to Pin 1 of Pushbutton.

Buck Converter

• IN+ connected to + of 7.4V Battery.
• IN- connected to - of 7.4V Battery.
• OUT+ connected to Vin of Arduino UNO and PWRIN of Adafruit 16-Channel 12-bit PWM Servo Driver.
• OUT- connected to GND of Arduino UNO and GND of Adafruit 16-Channel 12-bit PWM Servo Driver.

7.4V Battery

• + connected to IN+ of Buck converter.
• - connected to IN- of Buck converter.

Pushbutton

• Pin 4 connected to GND of Arduino UNO.
• Pin 1 connected to D13 of Arduino UNO.

Servo Motor MG996R (Instance 1)

• PMW connected to PWM11 of Adafruit 16-Channel 12-bit PWM Servo Driver.
• VCC 5V connected to 5.0V of Adafruit 16-Channel 12-bit PWM Servo Driver.
• GND connected to GND of Adafruit 16-Channel 12-bit PWM Servo Driver.

Servo Motor MG996R (Instance 2)

• PMW connected to PWM15 of Adafruit 16-Channel 12-bit PWM Servo Driver.
• VCC 5V connected to 5.0V of Adafruit 16-Channel 12-bit PWM Servo Driver.
• GND connected to GND of Adafruit 16-Channel 12-bit PWM Servo Driver.

Servo Motor MG996R (Instance 3)

• PMW connected to PWM7 of Adafruit 16-Channel 12-bit PWM Servo Driver.
• VCC 5V connected to 5.0V of Adafruit 16-Channel 12-bit PWM Servo Driver.
• GND connected to GND of Adafruit 16-Channel 12-bit PWM Servo Driver.

Servo Motor MG996R (Instance 4)

• PMW connected to PWM3 of Adafruit 16-Channel 12-bit PWM Servo Driver.
• VCC 5V connected to 5.0V of Adafruit 16-Channel 12-bit PWM Servo Driver.
• GND connected to GND of Adafruit 16-Channel 12-bit 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:

}

Additional Documentation (documentation.txt)