Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as an ESP32 microcontroller, sensors, a display, power supply modules, and other supporting components. The circuit is designed to interface multiple sensors and a display with the ESP32 microcontroller, powered through a UPS module and a step-down buck converter.

Component List

1. UPS Module

   • Pins: DC-, DC+, BAT+, BAT-, OUT+, OUT-
   • Description: Uninterruptible Power Supply module to ensure continuous power.
   • Purpose: Provides stable power to the circuit components.

2. Step down Buck converter

   • Pins: IN +, IN - GND, OUT +, OUT - GND
   • Description: Converts higher voltage to a lower, stable voltage.
   • Purpose: Supplies regulated voltage to the ESP32 and other components.

3. DHT22

   • Pins: +, Out, -
   • Description: Digital temperature and humidity sensor.
   • Purpose: Measures temperature and humidity.

4. 12v power supply

   • Pins: +, -
   • Description: Provides 12V DC power.
   • Purpose: Powers the UPS module.

5. OLED 1.3"

   • Pins: GND, VCC, SCL, SDA
   • Description: 1.3-inch OLED display.
   • Purpose: Displays information.

6. 18650 in holder

   • Pins: GND, VCC
   • Description: Battery holder for 18650 cells.
   • Purpose: Provides battery power.

7. Resistor

   • Pins: pin1, pin2
   • Description: 1000 Ohms resistor.
   • Purpose: Used in the circuit for current limiting.

8. Strain Gauge Y3

   • Pins: VCC, GND, OUT
   • Description: Strain gauge sensor.
   • Purpose: Measures strain.

9. ESP32-S3-DevKitC-1-N8R2

   • Pins: GND, 5Vin, 14, 13, 12, 11, 10, 9, 46, 3, 8, 18, 17, 16, 15, 7, 6, 5, 4, 3v3, TX, RX, 1, 2, 42, 41, 40, 39, 38, 37, 36, 35, 0, 45, 48, 47, 21, 20, 19
   • Description: ESP32 microcontroller development board.
   • Purpose: Central processing unit for the circuit.

10. ADXL345

    • Pins: GND, VCC, CS, INT1, INT2, SDO, SDA, SCL
    • Description: 3-axis accelerometer.
    • Purpose: Measures acceleration.

11. MPU-6050

    • Pins: VCC, GND, SCL, SDA, XDA, XCL, AD0, INT
    • Description: 6-axis motion tracking device.
    • Purpose: Measures acceleration and gyroscopic data.

12. 2Pin Push Switch

    • Pins: Input +, Output +
    • Description: Push button switch.
    • Purpose: User input for the circuit.

Wiring Details

UPS Module

• DC-: Connected to 12v power supply (-)
• DC+: Connected to 12v power supply (+)
• BAT+: Connected to 18650 in holder (VCC)
• BAT-: Connected to 18650 in holder (GND)
• OUT+: Connected to Step down Buck converter (IN +)
• OUT-: Connected to Step down Buck converter (IN - GND)

Step down Buck converter

• IN +: Connected to UPS Module (OUT+)
• IN - GND: Connected to UPS Module (OUT-)
• OUT +: Connected to ESP32 (5Vin) and OLED 1.3" (VCC)
• OUT - GND: Connected to ESP32 (GND)

DHT22

• +: Connected to ESP32 (3v3)
• Out: Connected to ESP32 (1)
• -: Connected to ESP32 (GND)

12v power supply

• -: Connected to UPS Module (DC-)
• +: Connected to UPS Module (DC+)

OLED 1.3"

• GND: Connected to ESP32 (GND)
• VCC: Connected to Step down Buck converter (OUT +)
• SCL: Connected to ESP32 (9)
• SDA: Connected to ESP32 (8)

18650 in holder

• GND: Connected to UPS Module (BAT-)
• VCC: Connected to UPS Module (BAT+)

Resistor

• pin1: Connected to ESP32 (GND)
• pin2: Connected to ESP32 (4) and 2Pin Push Switch (Output +)

Strain Gauge Y3

• VCC: Connected to ESP32 (3v3)
• GND: Connected to ESP32 (GND)
• OUT: Connected to ESP32 (20)

ESP32-S3-DevKitC-1-N8R2

• GND: Connected to Step down Buck converter (OUT - GND), Resistor (pin1), Strain Gauge Y3 (GND), OLED 1.3" (GND), MPU-6050 (GND), DHT22 (-), ADXL345 (GND)
• 5Vin: Connected to Step down Buck converter (OUT +)
• 3v3: Connected to 2Pin Push Switch (Input +), Strain Gauge Y3 (VCC), MPU-6050 (VCC), DHT22 (+), ADXL345 (VCC)
• 9: Connected to OLED 1.3" (SCL), MPU-6050 (SCL), ADXL345 (SCL)
• 8: Connected to OLED 1.3" (SDA), MPU-6050 (SDA), ADXL345 (SDA)
• 4: Connected to Resistor (pin2) and 2Pin Push Switch (Output +)
• 1: Connected to DHT22 (Out)
• 20: Connected to Strain Gauge Y3 (OUT)

ADXL345

• GND: Connected to ESP32 (GND)
• VCC: Connected to ESP32 (3v3)
• SCL: Connected to ESP32 (9)
• SDA: Connected to ESP32 (8)

MPU-6050

• VCC: Connected to ESP32 (3v3)
• GND: Connected to ESP32 (GND)
• SCL: Connected to ESP32 (9)
• SDA: Connected to ESP32 (8)

2Pin Push Switch

• Input +: Connected to ESP32 (3v3)
• Output +: Connected to Resistor (pin2) and ESP32 (4)

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and code section. Each component is described with its purpose and connections, ensuring clarity and ease of understanding for anyone working with this circuit.