[Waterproof DS18B20 Sensor Kit Tutorial_1] DIY: Auto AC for Your Pet Fish
by Juncheng in Living > Life Hacks
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[Waterproof DS18B20 Sensor Kit Tutorial_1] DIY: Auto AC for Your Pet Fish
![IMG_0012.jpg](/proxy/?url=https://content.instructables.com/F57/AB48/J52Q846N/F57AB48J52Q846N.jpg&filename=IMG_0012.jpg)
The sweat came out in a fine dew on my forehead when I left a room with AC and get outdoor yesterday. It just came up to my mind that my pet fish may need their own auto AC since I would go for a trip some day. So I DIY an AC through Waterproof DS18B20 Digital Temperature Sensor from DFrobot. It suits every rectangular fishbowl and costs little power.
Deal With All the Hardware Connection(NO SOLDERING REQUIRED)
![image1.jpeg](/proxy/?url=https://content.instructables.com/F2I/R1U0/J52Q847B/F2IR1U0J52Q847B.jpg&filename=image1.jpeg)
![image2.jpeg](/proxy/?url=https://content.instructables.com/FCT/RIBG/J52Q847C/FCTRIBGJ52Q847C.jpg&filename=image2.jpeg)
![image3.jpeg](/proxy/?url=https://content.instructables.com/FT9/TOF6/J52Q847D/FT9TOF6J52Q847D.jpg&filename=image3.jpeg)
Required Hardware:
USB Cable A-B for Arduino Uno/Mega
2x2A DC Motor Shield for Arduino
Wall Adapter Power Supply 12VDC
some PMMA, and some wire
Install Arduino IDE
![image1.png](/proxy/?url=https://content.instructables.com/F4I/TYCU/J52Q8478/F4ITYCUJ52Q8478.png&filename=image1.png)
Open the next URL and pick the correct version for your machine. https://www.arduino.cc/en/Main/Software
Upload the Code &Add Library Through This Button.
![image2.png](/proxy/?url=https://content.instructables.com/FIE/G9G0/J52Q8477/FIEG9G0J52Q8477.png&filename=image2.png)
#include
int DS18S20_Pin = 2; //DS18S20 Signal pin on digital 2
int E1 = 5;
int M1 = 4;
int E2 = 6;
int M2 = 7;
//Temperature chip i/o
OneWire ds(DS18S20_Pin); // on digital pin 2
void setup(void) {
Serial.begin(9600);
pinMode(4, OUTPUT);
pinMode(7, OUTPUT);
}
void loop(void) {
int value =0;
float temperature= getTemp();
Serial.println(temperature);
delay(100);
if(temperature > 25.00)
{
digitalWrite(M1,HIGH);
digitalWrite(M2, HIGH);
analogWrite(E1, 255); //PWM
analogWrite(E2, 255); //PWM
delay(30);
}
else{
digitalWrite(M1,LOW);
digitalWrite(M2, LOW);
analogWrite(E1, 0); //PWM
analogWrite(E2, 0); //PWM
delay(30);
}
//just here to slow down the output so it is easier to read
}
float getTemp(){
//returns the temperature from one DS18S20 in DEG Celsius
byte data[12];
byte addr[8];
if ( !ds.search(addr)) {
//no more sensors on chain, reset search
ds.reset_search();
return -1000;
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.println("CRC is not valid!");
return -1000;
}
if ( addr[0] != 0x10 && addr[0] != 0x28) {
Serial.print("Device is not recognized");
return -1000;
}
ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end
byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for (int i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
ds.reset_search();
byte MSB = data[1];
byte LSB = data[0];
float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;
return TemperatureSum;
}
Decorate Your Project and Make It Suitable for the Size of the Fishbowl
![IMG_0013.jpg](/proxy/?url=https://content.instructables.com/FMR/21IR/J52Q846K/FMR21IRJ52Q846K.jpg&filename=IMG_0013.jpg)
![IMG_0010.jpg](/proxy/?url=https://content.instructables.com/FN9/65GJ/J52Q8475/FN965GJJ52Q8475.jpg&filename=IMG_0010.jpg)
Check Everything Yourself!!!
![IMG_0021.jpg](/proxy/?url=https://content.instructables.com/FSX/56QO/J52Q8457/FSX56QOJ52Q8457.jpg&filename=IMG_0021.jpg)
![IMG_0019.jpg](/proxy/?url=https://content.instructables.com/F6J/RYAE/J52Q845O/F6JRYAEJ52Q845O.jpg&filename=IMG_0019.jpg)
Leave your pet fish a ‘coolest’ summer ever.