Circuit Documentation

Summary of the Circuit

This circuit is designed to utilize a dual 18650 Li-ion battery configuration to power various components including an MPU-6050 sensor, an Arduino UNO microcontroller, two servos, a battery indicator, and a charging module. The power from the batteries is managed by a rocker switch and regulated by an LM2956 buck converter. The Arduino UNO is used to control the servos and communicate with the MPU-6050 sensor via I2C. The battery indicator provides visual feedback on the battery status, and the charging module facilitates battery charging.

Component List

18650 Li-ion Battery x 2

• Description: A pair of 18650 lithium-ion rechargeable batteries.
• Pins: +, -

MPU-6050

• Description: A motion processing unit that contains a 3-axis gyroscope and a 3-axis accelerometer.
• Pins: VCC, GND, SCL, SDA, XDA, XCL, AD0, INT

Arduino UNO

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

LM2956 Buck Converter DC-DC

• Description: A DC-DC step-down (buck) converter module.
• Pins: OUT+, OUT-, IN+, IN-

Battery Indicator

• Description: A module that indicates the charge level of the battery.
• Pins: +, -

2S Charging Module

• Description: A charging module designed for 2S lithium-ion battery configurations.
• Pins: BAT +, GND

Rocker Switch

• Description: A simple on-off switch to control the power flow in the circuit.
• Pins: 1, 2

Servo

• Description: An actuator capable of precise angular positioning.
• Pins: GND, VCC, PWM

2.1mm Male

• Description: A male power connector commonly used for DC power supply.
• Pins: +, -

Wiring Details

18650 Li-ion Battery x 2

• + connected to Rocker Switch pin 2 and 2S Charging Module pin BAT +
• - connected to Battery Indicator pin -, 2S Charging Module pin GND, 2.1mm Male pin -, and LM2956 Buck Converter pin IN-

MPU-6050

• VCC connected to Arduino UNO pin 5V
• GND connected to Arduino UNO pin GND
• SCL connected to Arduino UNO pin A5
• SDA connected to Arduino UNO pin A4

Arduino UNO

• 5V and GND connected to MPU-6050 pins VCC and GND respectively
• A5 (SCL) and A4 (SDA) connected to MPU-6050 pins SCL and SDA respectively
• D10 connected to Servo (instance 1) pin PWM
• D9 connected to Servo (instance 2) pin PWM

LM2956 Buck Converter DC-DC

• OUT+ connected to both Servos' VCC pins
• OUT- connected to both Servos' GND pins
• IN+ connected to Rocker Switch pin 1, Battery Indicator pin +, 2.1mm Male pin +
• IN- connected to 18650 Li-ion Battery x 2 pin -

Battery Indicator

• + connected to Rocker Switch pin 1 and LM2956 Buck Converter pin IN+
• - connected to 18650 Li-ion Battery x 2 pin -

2S Charging Module

• BAT + connected to 18650 Li-ion Battery x 2 pin +
• GND connected to 18650 Li-ion Battery x 2 pin -

Rocker Switch

• Pin 1 connected to Battery Indicator pin +, 2.1mm Male pin +, and LM2956 Buck Converter pin IN+
• Pin 2 connected to 18650 Li-ion Battery x 2 pin +

Servo (instance 1)

• PWM connected to Arduino UNO pin D10
• VCC and GND connected to LM2956 Buck Converter pins OUT+ and OUT- respectively

Servo (instance 2)

• PWM connected to Arduino UNO pin D9
• VCC and GND connected to LM2956 Buck Converter pins OUT+ and OUT- respectively

2.1mm Male

• + connected to Rocker Switch pin 1 and LM2956 Buck Converter pin IN+
• - connected to 18650 Li-ion Battery x 2 pin -

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 specific to the circuit's operation. It will need to be populated with the necessary setup and loop code to control the MPU-6050 sensor and the servos.