Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino Nano as the central microcontroller, interfaced with various components such as sensors, a Bluetooth module, a voltage regulator, capacitors, a motor, a transistor, a diode, a speaker, a resistor, and a media player module. The circuit is powered by a 4 x AAA battery mount, and the voltage is regulated using a 7805 voltage regulator. The Arduino Nano facilitates communication with the HC-05 Bluetooth Module and the DFPlayer MINI, as well as controlling a vibration motor through an NPN transistor and reading data from an MPU-6050 sensor and a flex resistor.

Component List

Arduino Nano

• Microcontroller board based on the ATmega328P
• Pins: D1/TX, D0/RX, RESET, GND, D2 to D13, VIN, 5V, A0 to A7, AREF, 3V3

Electrolytic Capacitor

• Capacitance: 0.0001 Farads
• Pins: -, +

4 x AAA Battery Mount

• Power supply component
• Pins: -, +

7805 Voltage Regulator

• 5V voltage regulator
• Pins: Vin, Gnd, Vout

Ceramic Capacitor

• Capacitance: 0.0000001 Farads
• Pins: pin0, pin1

MPU-6050

• Motion tracking device with a 3-axis gyroscope and a 3-axis accelerometer
• Pins: VCC, GND, SCL, SDA, XDA, XCL, AD0, INT

2.2 inch Basic Flex Resistor

• Flexible sensor that changes resistance when bent
• Pins: Pin 2, pin 1

HC-05 Bluetooth Module

• Bluetooth module for wireless communication
• Pins: Key, VCC, TXD, RXD, State, GND

Vibration Motor

• Small motor that provides haptic feedback
• Pins: POS, NEG

NPN-Transistor

• Bipolar junction transistor used for switching and amplification
• Pins: E, C, B

Diode

• Component that allows current to flow in one direction
• Pins: cathode, anode

Piezo Speaker

• Electronic device that produces sound
• Pins: pin1, pin2

Resistor

• Resistance: 200 Ohms
• Pins: pin1, pin2

DFPlayer MINI

• Compact MP3 player module for playing sound files
• Pins: VCC, BUSY, RX, USB -, TX, USB +, DAC_R, K2/ADC_KEY, DAC_L, K1/ADC_KEY, SPK1, IO 2, GND, SPK2, IO 1

Wiring Details

Arduino Nano

• GND connected to the common ground net
• VIN connected to the output of the 7805 voltage regulator
• 5V connected to the VCC pins of MPU-6050, HC-05 Bluetooth Module, and DFPlayer MINI
• D1/TX connected to RXD of HC-05 Bluetooth Module
• D0/RX connected to TXD of HC-05 Bluetooth Module
• D9 connected to the base (B) of the NPN-Transistor
• D10 connected to one terminal of the Piezo Speaker (other terminal connected to a 200 Ohm resistor)
• D11/MOSI connected to TX of DFPlayer MINI
• D12/MISO connected to RX of DFPlayer MINI
• A5 (SCL) connected to SCL of MPU-6050
• A4 (SDA) connected to SDA of MPU-6050
• A0 connected to Pin 2 of the 2.2 inch Basic Flex Resistor

Electrolytic Capacitor

• "+" connected to Vin of the 7805 voltage regulator and "+" of the 4 x AAA Battery Mount
• "-" connected to the common ground net

4 x AAA Battery Mount

• "+" connected to Vin of the 7805 voltage regulator and "+" of the Electrolytic Capacitor
• "-" connected to the common ground net

7805 Voltage Regulator

• Vin connected to "+" of the 4 x AAA Battery Mount and "+" of the Electrolytic Capacitor
• Gnd connected to the common ground net
• Vout connected to VIN of the Arduino Nano and one terminal of the Ceramic Capacitor

Ceramic Capacitor

• pin0 connected to the common ground net
• pin1 connected to Vout of the 7805 voltage regulator

MPU-6050

• VCC connected to 5V of the Arduino Nano
• GND connected to the common ground net
• SCL connected to A5 (SCL) of the Arduino Nano
• SDA connected to A4 (SDA) of the Arduino Nano

2.2 inch Basic Flex Resistor

• pin 1 connected to 5V of the Arduino Nano
• Pin 2 connected to A0 of the Arduino Nano

HC-05 Bluetooth Module

• VCC connected to 5V of the Arduino Nano
• GND connected to the common ground net
• TXD connected to D0/RX of the Arduino Nano
• RXD connected to D1/TX of the Arduino Nano

Vibration Motor

• POS connected to the collector (C) of the NPN-Transistor
• NEG connected to the common ground net

NPN-Transistor

• E connected to the common ground net
• C connected to POS of the Vibration Motor and cathode of the Diode
• B connected to D9 of the Arduino Nano

Diode

• anode connected to the common ground net
• cathode connected to C of the NPN-Transistor

Piezo Speaker

• pin1 connected to the common ground net
• pin2 connected to D10 of the Arduino Nano and one terminal of the 200 Ohm resistor

Resistor

• pin1 connected to the common ground net
• pin2 connected to pin2 of the Piezo Speaker and D10 of the Arduino Nano

DFPlayer MINI

• VCC connected to 5V of the Arduino Nano
• GND connected to the common ground net
• TX connected to D11/MOSI of the Arduino Nano
• RX connected to D12/MISO of the Arduino Nano

Documented Code

Arduino Nano Code (sketch.ino)

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

}

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

}

Additional Notes (documentation.txt)

No additional code documentation provided.