im crerating a power bank for iphone. its 3 solar panels wired to a battery. the battery is connected to the arduino nano every. and the i have a transmitter coil connected to the the nano on pin 9. this is the code
#include <Arduino.h>
// Pin definitions
#define TRANSMITTER_COIL_PIN 9
#define ON_OFF_SWITCH_PIN 6
#define BATTERY_VOLTAGE_PIN A0
// Battery thresholds
#define MIN_BATTERY_VOLTAGE 3.5 // Minimum battery voltage in Volts
#define MAX_BATTERY_VOLTAGE 4.2 // Maximum battery voltage in Volts
// Overvoltage and overcurrent thresholds
#define MAX_INPUT_VOLTAGE 5.5 // Maximum allowable input voltage in Volts
#define MAX_INPUT_CURRENT 2.0 // Maximum allowable input current in Amperes
// PWM settings
const int pwmPin = 9; // PWM output pin
int pwmValue = 128; // Initial PWM duty cycle (adjustable)
// Function prototypes
void setup();
void loop();
bool isBatteryLow();
bool isBatteryFullyCharged();
bool isInputOvervoltage();
bool isInputOvercurrent();
void setup() {
// Set PWM pin as output
pinMode(pwmPin, OUTPUT);
// Initialize pin modes
pinMode(TRANSMITTER_COIL_PIN, OUTPUT);
pinMode(ON_OFF_SWITCH_PIN, INPUT_PULLUP); // Use internal pull-up resistor
}
void loop() {
// Adjust duty cycle as needed
// For example:
// pwmValue = 128; // 50% duty cycle
// analogWrite(pwmPin, pwmValue); // Update PWM duty cycle
// Check if the battery is low
if (isBatteryLow()) {
// Activate charging circuit (e.g., enable transmitter coil)
analogWrite(pwmPin, pwmValue);
} else {
// Deactivate charging circuit
digitalWrite(TRANSMITTER_COIL_PIN, LOW);
}
// Check if the battery is fully charged
if (isBatteryFullyCharged()) {
// Turn off charging circuit
digitalWrite(TRANSMITTER_COIL_PIN, LOW);
}
// Check for overvoltage or overcurrent conditions
if (isInputOvervoltage() || isInputOvercurrent()) {
// Handle overvoltage or overcurrent condition (e.g., disable charging)
digitalWrite(TRANSMITTER_COIL_PIN, LOW);
// You can also add additional actions like displaying an error message or blinking an LED
}
// Delay for stability
delay(1000); // Adjust delay as needed
}
bool isBatteryLow() {
// Read battery voltage
float batteryVoltage = analogRead(BATTERY_VOLTAGE_PIN) * (5.0 / 1023.0); // Convert ADC value to voltage
// Check if battery voltage is below minimum threshold
return batteryVoltage < MIN_BATTERY_VOLTAGE;
}
bool isBatteryFullyCharged() {
// Read battery voltage
float batteryVoltage = analogRead(BATTERY_VOLTAGE_PIN) * (5.0 / 1023.0); // Convert ADC value to voltage
// Check if battery voltage is above maximum threshold
return batteryVoltage >= MAX_BATTERY_VOLTAGE;
}
bool isInputOvervoltage() {
// Read input voltage
float inputVoltage = analogRead(A1) * (5.0 / 1023.0); // Example: Read input voltage from A1 pin
// Check if input voltage exceeds maximum allowable voltage
return inputVoltage > MAX_INPUT_VOLTAGE;
}
bool isInputOvercurrent() {
// Read input current
float inputCurrent = analogRead(A2) * (5.0 / 1023.0); // Example: Read input current from A2 pin
// Convert input current to Amperes (adjust conversion factor as needed)
inputCurrent = inputCurrent / 1000.0; // Example: Conversion factor for 5V ADC range
// Check if input current exceeds maximum allowable current
return inputCurrent > MAX_INPUT_CURRENT;
}