Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as batteries, a Battery Management System (BMS), a TP4056 charger module, a DC-DC boost converter, an Arduino UNO, an ESP32, a servo motor, a rocker switch, and a PAM8403 amplifier. The circuit is designed to manage power distribution, control a servo motor, and amplify audio signals.

Component List

1. 3.7v Battery

   • Pins: +, -
   • Description: Provides power to the circuit.
   • Purpose: Power source.

2. BMS (Battery Management System)

   • Pins: B+, B2, B1, B-, P-, P+
   • Description: Manages the charging and discharging of the batteries.
   • Purpose: Battery management.

3. TP4056

   • Pins: OUT-, B-, B+, OUT+, IN-, IN+
   • Description: Lithium-ion battery charger module.
   • Purpose: Charging the batteries.

4. DC-DC Boost Converter

   • Pins: VIN-, VIN+, VOUT+, VOUT-
   • Description: Boosts the voltage from the battery to a higher level.
   • Purpose: Voltage conversion.

5. Arduino UNO

   • 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
   • Description: Microcontroller board.
   • Purpose: Control and processing.

6. ESP32

   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT
   • Description: Wi-Fi and Bluetooth microcontroller.
   • Purpose: Wireless communication and control.

7. MG996R (Servo Motor)

   • Pins: GND, VCC, SIG
   • Description: High-torque servo motor.
   • Purpose: Actuation.

8. Rocker Switch

   • Pins: 1, 2
   • Description: On/Off switch.
   • Purpose: Power control.

9. PAM8403

   • Pins: 5vIN+, GND/IN-, R-INPUT, GND, L-INPUT, L-, L+, R+, R-
   • Description: 3W stereo audio amplifier.
   • Purpose: Audio amplification.

Wiring Details

3.7v Battery

• + Pin: Connected to B+ pin of BMS.
• - Pin: Connected to B- pin of BMS.

BMS

• B+ Pin: Connected to + pin of all 3.7v batteries.
• B- Pin: Connected to - pin of all 3.7v batteries.
• P- Pin: Connected to IN- pin of TP4056.
• P+ Pin: Connected to IN+ pin of TP4056.

TP4056

• IN- Pin: Connected to P- pin of BMS.
• IN+ Pin: Connected to P+ pin of BMS.
• OUT- Pin: Connected to VIN- pin of DC-DC Boost Converter.
• OUT+ Pin: Connected to VIN+ pin of DC-DC Boost Converter.

DC-DC Boost Converter

• VIN- Pin: Connected to OUT- pin of TP4056.
• VIN+ Pin: Connected to OUT+ pin of TP4056.
• VOUT- Pin: Connected to GND pin of MG996R, GND pin of ESP32, and GND pin of Arduino UNO.
• VOUT+ Pin: Connected to pin 1 of Rocker Switch.

Rocker Switch

• Pin 1: Connected to VOUT+ pin of DC-DC Boost Converter.
• Pin 2: Connected to VCC pin of MG996R, VIN pin of ESP32, and Vin pin of Arduino UNO.

Arduino UNO

• Vin Pin: Connected to pin 2 of Rocker Switch.
• GND Pin: Connected to VOUT- pin of DC-DC Boost Converter.
• D13 Pin: Connected to SIG pin of MG996R.
• D1 Pin: Connected to RX0 pin of ESP32.
• D0 Pin: Connected to TX0 pin of ESP32.

ESP32

• VIN Pin: Connected to pin 2 of Rocker Switch.
• GND Pin: Connected to VOUT- pin of DC-DC Boost Converter.
• RX0 Pin: Connected to D1 pin of Arduino UNO.
• TX0 Pin: Connected to D0 pin of Arduino UNO.
• 3V3 Pin: Connected to 5vIN+ pin of PAM8403.

MG996R (Servo Motor)

• GND Pin: Connected to VOUT- pin of DC-DC Boost Converter.
• VCC Pin: Connected to pin 2 of Rocker Switch.
• SIG Pin: Connected to D13 pin of Arduino UNO.

PAM8403

• GND Pin: Connected to GND pin of ESP32.
• 5vIN+ Pin: Connected to 3V3 pin of ESP32.

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)

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and documented code. Each component is described, and its connections are detailed to ensure clarity and ease of understanding.