Compare commits
No commits in common. "36bf6b886aa4e43709f579bceba2790aac221c79" and "f965ba8fb2d06d5a6f752262824f7126d4492e7d" have entirely different histories.
36bf6b886a
...
f965ba8fb2
7 changed files with 8 additions and 143 deletions
Binary file not shown.
Binary file not shown.
Binary file not shown.
Binary file not shown.
39
README.md
39
README.md
|
|
@ -1,33 +1,10 @@
|
||||||
# tank_cooler
|
# tank_cooler
|
||||||
|
|
||||||
A tiny tank cooler.
|
A tiny tank cooler.
|
||||||
|
|
||||||
Used components:
|
Used components:
|
||||||
----------------
|
|
||||||
|
Arduino nano
|
||||||
Arduino nano (old bootloader)
|
PC fan 120mm 5V
|
||||||
PC fan 120mm 5V
|
PWM D4184 MOS breakout board
|
||||||
PWM D4184 MOS breakout board
|
USB-C connector
|
||||||
USB-C connector
|
|
||||||
|
|
||||||
Connections:
|
|
||||||
------------
|
|
||||||
|
|
||||||
USB-C D+ <-> Pin4 CH430 chip
|
|
||||||
USB-C D- <-> Pin5 CH430 chip
|
|
||||||
|
|
||||||
VIN <-> PWM board (+)
|
|
||||||
VIN <-> USB-C V+
|
|
||||||
|
|
||||||
GND <-> USB-C GND
|
|
||||||
GND <-> BMP280 breakout board GND
|
|
||||||
GND <-> PWM breakout board GND
|
|
||||||
|
|
||||||
D9 <-> PWM Pin of the breakout board
|
|
||||||
|
|
||||||
A4 <-> SCL pin of BMP280 breakout board
|
|
||||||
A5 <-> SDA pin of BMP280 breakout board
|
|
||||||
|
|
||||||
PWM board load <-> PC fan (+)
|
|
||||||
PWM board GNC <-> PC fan (-)
|
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -1,73 +0,0 @@
|
||||||
|
|
||||||
#define FAN_PIN 9 // D9
|
|
||||||
#define L_LED_PIN 13 // D13
|
|
||||||
|
|
||||||
#define BMP280_I2C_ADDRESS 0x76 // BMP280 conneciton: D1 = SCL; D2 = SDA
|
|
||||||
|
|
||||||
// minimum value to start both fan's is 110
|
|
||||||
// without queeking noise is 255
|
|
||||||
#define FAN_ON_TEMP 26.0
|
|
||||||
#define FAN_OFF_MAX_TEMP 25.0
|
|
||||||
|
|
||||||
#define FAN_ON_STATE HIGH
|
|
||||||
#define FAN_OFF_STATE LOW
|
|
||||||
|
|
||||||
#define BMP280_CHECK_INTERVAL_MS 2000 // every 60000 = 60 seconds
|
|
||||||
|
|
||||||
float bmp280_temp = -99.9;
|
|
||||||
uint32_t bmp280_lastcheck_millis = BMP280_CHECK_INTERVAL_MS;
|
|
||||||
|
|
||||||
uint8_t fan_state = LOW;
|
|
||||||
|
|
||||||
float sensor_bmp280_temperature();
|
|
||||||
|
|
||||||
void setup()
|
|
||||||
{
|
|
||||||
// put your setup code here, to run once:
|
|
||||||
|
|
||||||
// setup serial
|
|
||||||
Serial.begin(115200);
|
|
||||||
Serial.println();
|
|
||||||
delay(1000);
|
|
||||||
|
|
||||||
// setup BMP280
|
|
||||||
Serial.println("Sensor BMP280 init status: " + String(sensor_bmp280_begin(BMP280_I2C_ADDRESS)));
|
|
||||||
bmp280_temp = sensor_bmp280_temperature();
|
|
||||||
|
|
||||||
// setup FAN Pin
|
|
||||||
pinMode(FAN_PIN, OUTPUT);
|
|
||||||
|
|
||||||
pinMode(L_LED_PIN, OUTPUT);
|
|
||||||
}
|
|
||||||
|
|
||||||
void loop()
|
|
||||||
{
|
|
||||||
// put your main code here, to run repeatedly:
|
|
||||||
|
|
||||||
if ((bmp280_lastcheck_millis + BMP280_CHECK_INTERVAL_MS) <= millis())
|
|
||||||
{
|
|
||||||
bmp280_temp = sensor_bmp280_temperature();
|
|
||||||
Serial.println("Temperature: " + String(bmp280_temp) + "°C");
|
|
||||||
digitalWrite(L_LED_PIN, HIGH);
|
|
||||||
|
|
||||||
if (fan_state > 0 && bmp280_temp <= FAN_OFF_MAX_TEMP)
|
|
||||||
{
|
|
||||||
fan_state = FAN_OFF_STATE; // off
|
|
||||||
}
|
|
||||||
|
|
||||||
if (bmp280_temp >= FAN_ON_TEMP)
|
|
||||||
{
|
|
||||||
fan_state = FAN_ON_STATE;
|
|
||||||
}
|
|
||||||
|
|
||||||
Serial.println("FAN state: " + String(fan_state));
|
|
||||||
|
|
||||||
digitalWrite(FAN_PIN, fan_state);
|
|
||||||
|
|
||||||
digitalWrite(L_LED_PIN, LOW);
|
|
||||||
|
|
||||||
bmp280_lastcheck_millis = millis();
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
@ -1,39 +0,0 @@
|
||||||
|
|
||||||
#include <Adafruit_BMP280.h> // Install from library manager - sensor board info: https://www.bastelgarage.ch/bmp280-temperatur-luftdruck-sensor
|
|
||||||
|
|
||||||
Adafruit_BMP280 _sensor_bmp280;
|
|
||||||
Adafruit_Sensor *_sensor_bmp280_temp = _sensor_bmp280.getTemperatureSensor();
|
|
||||||
Adafruit_Sensor *_sensor_bmp280_pressure = _sensor_bmp280.getPressureSensor();
|
|
||||||
|
|
||||||
#define BPM280_TEMP_FACTOR 1.0
|
|
||||||
|
|
||||||
bool sensor_bmp280_begin(uint8_t addr) {
|
|
||||||
bool status = _sensor_bmp280.begin(addr);
|
|
||||||
|
|
||||||
if (status) {
|
|
||||||
Serial.println("BMP280 Connected");
|
|
||||||
|
|
||||||
_sensor_bmp280.setSampling(Adafruit_BMP280::MODE_NORMAL, /* Operating Mode. */
|
|
||||||
Adafruit_BMP280::SAMPLING_X2, /* Temp. oversampling */
|
|
||||||
Adafruit_BMP280::SAMPLING_X16, /* Pressure oversampling */
|
|
||||||
Adafruit_BMP280::FILTER_X16, /* Filtering. */
|
|
||||||
Adafruit_BMP280::STANDBY_MS_500); /* Standby time. */
|
|
||||||
|
|
||||||
} else {
|
|
||||||
Serial.println("Could not find a valid BMP280 sensor, check wiring or try a different address!");
|
|
||||||
Serial.println("SensorID was: " + String(_sensor_bmp280.sensorID()));
|
|
||||||
Serial.println(" ID of 0xFF probably means a bad address, a BMP180 or BMP085");
|
|
||||||
Serial.println(" ID of 0x56-0x58 represents a BMP280,");
|
|
||||||
Serial.println(" ID of 0x60 represents a BME280,");
|
|
||||||
Serial.println(" ID of 0x61 represents a BME680.");
|
|
||||||
}
|
|
||||||
|
|
||||||
return status;
|
|
||||||
}
|
|
||||||
|
|
||||||
float sensor_bmp280_temperature() {
|
|
||||||
sensors_event_t temp_event, pressure_event;
|
|
||||||
_sensor_bmp280_temp->getEvent(&temp_event);
|
|
||||||
return temp_event.temperature * BPM280_TEMP_FACTOR;
|
|
||||||
}
|
|
||||||
|
|
||||||
Loading…
Reference in a new issue