Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a power supply, switches, a buck converter, and an ESP32 microcontroller. The circuit is designed to manage power distribution and control using various switches and a DC-DC buck converter to step down voltage. The ESP32 microcontroller is included for potential control and monitoring tasks.

Component List

1. 18650 Li-ion Battery x 2

   • Pins: +, -
   • Description: Provides the primary power source for the circuit.
   • Purpose: Supplies power to the entire circuit.

2. Rocker Switch

   • Pins: 1, 2
   • Description: A simple on/off switch.
   • Purpose: Controls the connection between the battery and the buck converter.

3. Toggle Switch

   • Pins: L1, COM, L2
   • Description: A switch that can toggle between two positions.
   • Purpose: Selects the input to the buck converter.

4. LM2956 Buck Converter DC-DC

   • Pins: OUT+, OUT-, IN+, IN-
   • Description: A DC-DC converter that steps down voltage.
   • Purpose: Converts the battery voltage to a lower voltage suitable for the ESP32 and other components.

5. ESP32 Devkit V1

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

6. Micro USB to Cable (2 Pin)

   • Pins: Micro USB, +, -
   • Description: A cable to connect the circuit to a USB power source.
   • Purpose: Provides an alternative power input to the circuit.

Wiring Details

18650 Li-ion Battery x 2

• + Pin:
  • Connected to COM pin of the Toggle Switch.
• - Pin:
  • Connected to 2 pin of the Rocker Switch.

Rocker Switch

• 1 Pin:
  • Connected to IN- pin of the LM2956 Buck Converter DC-DC.
• 2 Pin:
  • Connected to - pin of the 18650 Li-ion Battery x 2.

Toggle Switch

• COM Pin:
  • Connected to + pin of the 18650 Li-ion Battery x 2.
• L1 Pin:
  • Connected to IN+ pin of the LM2956 Buck Converter DC-DC.

LM2956 Buck Converter DC-DC

• IN+ Pin:
  • Connected to L1 pin of the Toggle Switch.
• IN- Pin:
  • Connected to 1 pin of the Rocker Switch.
• OUT+ Pin:
  • Connected to + pin of the Micro USB to Cable (2 Pin).
• OUT- Pin:
  • Connected to - pin of the Micro USB to Cable (2 Pin).

Micro USB to Cable (2 Pin)

• + Pin:
  • Connected to OUT+ pin of the LM2956 Buck Converter DC-DC.
• - Pin:
  • Connected to OUT- pin of the LM2956 Buck Converter DC-DC.

ESP32 Devkit V1

• VIN Pin:
  • Not connected in this circuit.
• GND Pin:
  • Not connected in this circuit.
• Other Pins:
  • Not connected in this circuit.

Code

There is no code provided for the microcontrollers in this circuit.

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This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and code documentation. This should serve as a useful reference for understanding and replicating the circuit.