Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to interface an Arduino Nano with various sensors and modules, including a Bluetooth module (HC-05), a 6DOF sensor (BMI160 Accelerometer Gyro), and multiple flex resistors. The circuit is powered by a polymer lithium-ion battery, which is managed by a lipo battery charger module and a step-up boost converter to regulate the voltage. A toggle switch is included to control the power flow. The Arduino Nano serves as the central processing unit, reading sensor data and communicating via Bluetooth.

Component List

• Arduino Nano: A compact microcontroller board based on the ATmega328P, featuring digital and analog I/O pins.
• HC-05 Bluetooth Module: A wireless communication module that allows for Bluetooth connectivity.
• BMI160 Accelerometer Gyro - 6DOF sensor: A sensor that provides 6 degrees of freedom, measuring acceleration and gyroscopic data.
• 2.2 inch Basic Flex Resistor: Flexible resistors used to detect bending or flexing.
• Polymer Lithium Ion Battery - 850mAh: A rechargeable battery that provides power to the circuit.
• Lipo Battery Charger Module: A module used to charge the polymer lithium-ion battery.
• Toggle Switch SPST: A single-pole single-throw switch used to control the power supply to the circuit.
• Step Up Boost 3v- 5v: A voltage step-up module that boosts the voltage from 3V to 5V.
• Resistor: A passive two-terminal electrical component that implements electrical resistance as a circuit element.

Wiring Details

Arduino Nano

• GND: Connected to the ground of the Bluetooth module, ground pins of resistors, and the ground of the 6DOF sensor.
• RX0: Receives data from the TXD pin of the HC-05 Bluetooth Module.
• TX1: Transmits data to the RXD pin of the HC-05 Bluetooth Module through a resistor.
• 3V3: Powers the 3V3 pin of the BMI160 Accelerometer Gyro.
• A0-A6: Analog input pins connected to various flex resistors and resistors.
• 5V: Provides power to the flex resistors.
• VIN: Connected to the VCC of the HC-05 Bluetooth Module and the output voltage of the Step Up Boost module.

HC-05 Bluetooth Module

• GND: Connected to the ground network.
• VCC: Powered by the VIN pin of the Arduino Nano.
• TXD: Transmits data to a resistor connected to the Arduino Nano.
• RXD: Receives data from the TX1 pin of the Arduino Nano.

BMI160 Accelerometer Gyro - 6DOF sensor

• 3V3: Powered by the 3V3 pin of the Arduino Nano.
• SDA: Connected to the A4 pin of the Arduino Nano for I2C data.
• SCL: Connected to the A5 pin of the Arduino Nano for I2C clock.
• GND: Connected to the ground network.

2.2 inch Basic Flex Resistor

• Pin 1: Connected to various analog pins (A0-A6) on the Arduino Nano.
• Pin 2: Connected to the 5V supply from the Arduino Nano.

Polymer Lithium Ion Battery - 850mAh

• GND: Connected to the B- pin of the lipo battery charger module.
• VCC: Connected to the B+ pin of the lipo battery charger module.

Lipo Battery Charger Module

• B-: Connected to the ground of the battery.
• B+: Connected to the VCC of the battery.
• OUT-: Connected to the COM pin of the toggle switch.
• OUT+: Connected to the Vi pin of the Step Up Boost module.

Toggle Switch SPST

• L1: Connected to the OUT- of the lipo battery charger module.
• COM: Connected to the ground network.

Step Up Boost 3v- 5v

• Vi: Connected to the OUT+ of the lipo battery charger module.
• GND: Connected to the ground network.
• Vo: Provides a stepped-up voltage to the VIN pin of the Arduino Nano.

Resistor

• Pin 1: Connected to various digital pins (TX1, A0-A6) on the Arduino Nano.
• Pin 2: Connected to the ground network.

Documented Code

Arduino Nano (Primary Microcontroller)

File: sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Arduino Nano (Secondary Microcontroller)

File: sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Note: The code provided for both Arduino Nano microcontrollers is a template with empty setup and loop functions. This code should be expanded with specific instructions for initializing the connected components and handling data acquisition and communication tasks.