Circuit Documentation

Summary

This document provides a detailed overview of a circuit design that includes various sensors, a motor driver, a microcontroller, and power management components. The circuit is designed to interface multiple sensors and motors with an ESP32 microcontroller, powered by a 9V battery through a buck converter.

Component List

1. SEN0245

   • Description: Sensor module
   • Pins: VCC, GND, SCL, SDA, INT, CE

2. SEN0427

   • Description: Sensor module
   • Pins: VCC, GND, SCL, SDA, INT, CE

3. I2C BMI160

   • Description: I2C-based sensor
   • Pins: DATA, CLK, GND, VCC

4. n20 motor with encoder

   • Description: Motor with encoder
   • Pins: M1, GND, C1, C2, Vcc, M2

5. 9V Battery

   • Description: Power source
   • Pins: -, +

6. MX1508 DC Motor Driver

   • Description: Motor driver
   • Pins: OUT 4, OUT 3, OUT 2, OUT1, IN 1, IN 2, IN 3, IN 4, Negative (-), Positive (+)

7. Buck converter

   • Description: Voltage regulator
   • Pins: IN+, IN-, OUT+, OUT-

8. ESP32 Wroom

   • Description: Microcontroller
   • Pins: 2 (3V3), 3 (Reset), 4 (GPIO36), 5 (GPIO39), 6 (GPIO34), 7 (GPIO35), 8 (GPIO32), 9 (GPIO33), 10 (GPIO25), 11 (GPIO26), 12 (GPIO27), 13 (GPIO14), 14 (GPIO12), GND, 16 (GPIO13), 17 (GPIO9), 18 (GPIO10), 19 (GPIO11), 5V, 37 (GPIO23), 36 (GPIO22/SCL), 35 (GPIO1/TXD0), 34 (GPIO3/RXD0), 33 (GPIO21/SDA), 31 (GPIO19), 30 (GPIO18), 29 (GPIO5), 28 (GPIO17), 27 (GPIO16), 26 (GPIO4), 25 (GPIO0), 24 (GPIO2), 23 (GPIO15), 22 (GPIO8), 21 (GPIO7), 20 (GPIO6)

Wiring Details

SEN0245

• VCC connected to Buck converter OUT+
• GND connected to Buck converter OUT-
• SCL connected to ESP32 Wroom GPIO22/SCL
• SDA connected to ESP32 Wroom GPIO21/SDA
• CE connected to ESP32 Wroom GPIO5

SEN0427

• VCC connected to Buck converter OUT+
• GND connected to Buck converter OUT-
• SCL connected to ESP32 Wroom GPIO22/SCL
• SDA connected to ESP32 Wroom GPIO21/SDA
• CE connected to ESP32 Wroom GPIO4

I2C BMI160

• VCC connected to Buck converter OUT+
• GND connected to Buck converter OUT-
• CLK connected to ESP32 Wroom GPIO22/SCL
• DATA connected to ESP32 Wroom GPIO21/SDA

n20 motor with encoder

• Vcc connected to Buck converter OUT+
• GND connected to Buck converter OUT-
• M1 connected to MX1508 DC Motor Driver OUT1
• M2 connected to MX1508 DC Motor Driver OUT2
• C1 connected to ESP32 Wroom GPIO19
• C2 connected to ESP32 Wroom GPIO23

9V Battery

• + connected to MX1508 DC Motor Driver Positive (+) and Buck converter IN+
• - connected to MX1508 DC Motor Driver Negative (-) and Buck converter IN-

MX1508 DC Motor Driver

• OUT 1 connected to n20 motor with encoder M1
• OUT 2 connected to n20 motor with encoder M2
• OUT 3 connected to n20 motor with encoder M1
• OUT 4 connected to n20 motor with encoder M2
• IN 1 connected to ESP32 Wroom GPIO12
• IN 2 connected to ESP32 Wroom GPIO14
• IN 3 connected to ESP32 Wroom GPIO27
• IN 4 connected to ESP32 Wroom GPIO26
• Positive (+) connected to 9V Battery +
• Negative (-) connected to 9V Battery -

Buck converter

• IN+ connected to 9V Battery +
• IN- connected to 9V Battery -
• OUT+ connected to VCC pins of all sensors and ESP32 Wroom 3V3
• OUT- connected to GND pins of all sensors and ESP32 Wroom GND

ESP32 Wroom

• 3V3 connected to Buck converter OUT+
• GND connected to Buck converter OUT-
• GPIO22/SCL connected to SCL pins of I2C BMI160, SEN0427, and SEN0245
• GPIO21/SDA connected to SDA pins of I2C BMI160, SEN0427, and SEN0245
• GPIO5 connected to SEN0245 CE
• GPIO4 connected to SEN0427 CE
• GPIO17 connected to SEN0245 CE
• GPIO16 connected to SEN0427 CE
• GPIO19 connected to n20 motor with encoder C1
• GPIO23 connected to n20 motor with encoder C2
• GPIO15 connected to n20 motor with encoder C1
• GPIO2 connected to n20 motor with encoder C2
• GPIO12 connected to MX1508 DC Motor Driver IN 1
• GPIO14 connected to MX1508 DC Motor Driver IN 2
• GPIO27 connected to MX1508 DC Motor Driver IN 3
• GPIO26 connected to MX1508 DC Motor Driver IN 4

Code

No code provided for this circuit.

---

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code documentation. Each component is described, and its connections are detailed to ensure proper assembly and functionality.