Circuit Documentation

Summary

This circuit integrates an Arduino Nano microcontroller with a KY-023 Dual Axis Joystick Module, an NRF24L01 wireless transceiver module, an electrolytic capacitor, and a 9V battery. The Arduino Nano reads the joystick's position and button state, then transmits this information wirelessly via the NRF24L01 module. The electrolytic capacitor is used to stabilize the power supply to the NRF24L01, which is sensitive to power fluctuations. The 9V battery provides the power source for the circuit.

Component List

Arduino Nano

• Microcontroller board based on the ATmega328P
• It has a variety of digital and analog I/O pins.

KY-023 Dual Axis Joystick Module (x2)

• Provides 2-axis analog input and a push button.
• Operates at +5V.

NRF24L01

• A 2.4GHz wireless transceiver module.
• Communicates with the Arduino via SPI.

Electrolytic Capacitor

• Capacitance: 10 Farads
• Used for power supply decoupling.

9V Battery

• Provides power to the circuit.

Wiring Details

Arduino Nano

• GND connected to the ground plane.
• D7 connected to NRF24L01 MOSI.
• D8 connected to NRF24L01 MISO.
• D9 connected to NRF24L01 CE.
• D10 connected to NRF24L01 CSN.
• D11/MOSI connected to NRF24L01 SCK.
• VIN connected to 9V Battery +.
• 5V connected to both KY-023 Joystick Modules +5V.
• A3 connected to one KY-023 Joystick Module VRy.
• A2 connected to one KY-023 Joystick Module VRx.
• A1 connected to the other KY-023 Joystick Module VRy.
• A0 connected to the other KY-023 Joystick Module VRx.
• 3V3 connected to Electrolytic Capacitor + and NRF24L01 VCC (3V).

KY-023 Dual Axis Joystick Module

• GND connected to the ground plane.
• +5V connected to Arduino Nano 5V.
• VRx connected to Arduino Nano A0 or A2.
• VRy connected to Arduino Nano A1 or A3.
• SW (not wired in this circuit).

NRF24L01

• GND connected to the ground plane.
• MOSI connected to Arduino Nano D7.
• CSN connected to Arduino Nano D10.
• VCC (3V) connected to Electrolytic Capacitor + and Arduino Nano 3V3.
• CE connected to Arduino Nano D9.
• SCK connected to Arduino Nano D11/MOSI.
• MISO connected to Arduino Nano D8.

Electrolytic Capacitor

• - connected to the ground plane.
• + connected to Arduino Nano 3V3 and NRF24L01 VCC (3V).

9V Battery

• - connected to the ground plane.
• + connected to Arduino Nano VIN.

Documented Code

#include <SPI.h>
#include <RF24.h>

RF24 radio(9, 10); // CE, CSN pins

const int joyXPin = A0;  // Joystick X-axis connected to A0
const int joyYPin = A1;  // Joystick Y-axis connected to A1
const int buttonPin = 2; // Joystick button connected to pin 2

void setup() {
  Serial.begin(9600);      // Initialize serial communication
  pinMode(buttonPin, INPUT_PULLUP); // Set the button pin as input with pull-up resistor
  radio.begin();
  radio.openWritingPipe(0xF0F0F0F0E1LL);
  radio.setPALevel(RF24_PA_HIGH);
  radio.setDataRate(RF24_1MBPS);
}

void loop() {
  int xValue = analogRead(joyXPin);  // Read X-axis value
  int yValue = analogRead(joyYPin);  // Read Y-axis value
  bool buttonState = digitalRead(buttonPin);  // Read button state

  // Print joystick values to serial monitor
  Serial.print("X: ");
  Serial.print(xValue);
  Serial.print(" Y: ");
  Serial.print(yValue);
  Serial.print(" Button: ");
  Serial.println(buttonState == LOW ? "Pressed" : "Released");
  const char text[] = "Hello from Nano!";
  radio.write(&text, sizeof(text));
  Serial.println("Message Sent");
  delay(1000); // 1 second delay
}

This code initializes the NRF24L01 module and sets up the Arduino to read the joystick's position and button state. It then sends a message wirelessly and prints the joystick values to the serial monitor.