Waterproof Digital Temperature Probe for Arduino DS18B20

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Item Number

DS18B20

Item Condition

New

Was

~~£4.50~~

Price

£3.50 (Save 22%) (inc VAT £4.20)

Options

Quantity

Fuse holder for Blade Fuse (Vehicle Fuses)

High Quality In Line Blade Fuse Holder for Cars and other Vehicles.

Complete with Short Red Cable, and housing cover

Reccomended for cars, lorries, boats, trucks etc.
Completely encapsulated housing

FHBLADE

£1.35

Red Top Push to Make Miiniature Switch

Miniature Push to Make, Release to Break Switch

125VAC 500mA, With 2 Solder Tags.

Dimensions 27.5mm long, 9.7mm diameter. 7mm nut.

Red Button

PTM1R

£0.65

3 Amp Latching Switch with Red Button

Push to make, Push again to Break (Alternate Action) Push to Latch Switch

Cut-out 12mm (M12 thread). Red Button 3A 125V AC, 1A 250V AC

PTL3R

£1.25

Green Top Push to Make Miniature Switch

Miniature Push to Make, Release to Break Switch

125VAC 500mA, With 2 Solder Tags.

Dimensions 27.5mm long, 9.7mm diameter. 7mm nut.

Green Button

PTM1G

£0.65

Quality Miniature Attractive Toggle Switch SPDT with Removable Red Dolly

Quality Miniature Toggle Switch SPDT Single Pole Changeover with removable Red Dolly.

Max ratings: 250V 3A, 125V 6A

Metal toggle with red plastic dolly.Dimensions: 35 x 9.5 x 6.5mm

TD11N

£1.25

Standard Toggle Switch Single Pole On Off 250VAC 1.5A

Toggle Switch Standard Size SPST On / Off

Rated at 250VAC 2A.Body Dims: L:25mm H:14mm W:14mm. 2 Solder Terminals

Panel cutout 12mm

Rated 1.5A 250VAC

Contact resistance 50mΩ max.

Dielectric strength 1000VAC/1min

TL10N

£1.50

Spring Assortment of 150 pieces

150piece Assortment Hard to Find Springs

Thus is a range of 20 of the most useful sizes

Extended springs

8pc 5.2 x 20.6mm

8pc 5.6 x 25.4mm

8pc 6.5 x 22.2mm

7pc 8.7 x 46.8mm

7pc 7.1 x 50.8mm

6pc 7.1 x 38.1mm

7pc 8.7 x 36.5mm

6pc 7.9 x 28.6mm

6pc 8.0 x 31.8mm

7pc 8.0 x 44.5mm

7pc 4.0 x 79.4mm

5pc 4.8 x 44.5mm

Compressed springs

10pc 7.1 x 12.7mm

10pc 6.4 x 10.3mm

10pc 7.1 x 19.1mm

6pc 9.5 x 15.9mm

9pc 9.5 x 19.1mm

5pc 9.1 x 34.9mm

8pc 5.6 x 38.1mm

10pc 5.6 x 17.5mm

SPR150

£6.50

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Waterproof digital temperature probe for Arduino and other microcontroller projects

This probe has a DS18B20 digital temperature IC inside a waterproof probe. It will give you a digital output that will vary depending on temperature.

Voltage : 3.3 to 5VDC

Temperature : -55C to 110C

Length : 1M

Example project:

DS18B20 High Accuracy Digital Thermometer.

This DS18B20 digital thermometer is extremely useful as a tool for measuring temperature for all kinds of different applications. It has a very wide temperature range (-55°C to 110°C) and high accuracy, especially at temperatures between -10°C to 85°C. In this project, we will be using an Arduino to read the temperature from the probe and display it on an LCD screen equipped with a KY1602 module.

Here’s what you will need:

Tools

Breadboard

Jumper Leads - Male to Male x 3

Jumper Leads – Male to Female x 4

Components

DS18B20 Temperature Probe x 1

Arduino Uno x 1 or Arduino Nano x 1

LCD1602B LCD Screen x 1

KY1602 Parallel to Serial Converter x 1

Libraries

DS18B20 V1.0.0 Arduino Library

OneWire

LiquidCrystal I2C

Step 1

First, you will need to connect the probe to the breadboard. This should be easy to do since the probe comes with pre-tinned leads. Simply push the ends of the leads into the breadboard sockets and use a 4.6kΩ pull-up resistor on the data pin as shown in fig.1. Now, you will need to connect the Arduino to the breadboard. Use the jumper leads to connect the male to male jumper leads to connect the power, ground and digital pin to the breadboard.

Step 2

Solder the KY1602 module onto the 1602 LCD screen. Pin 1 on the KY1602 module is the one closest to the 4 data and power pins. Once soldered, you can now connect the LCD display to the Arduino as shown in fig.1:

Fig. 1

Step 3

Connect the Arduino to your computer and install the libraries mentioned above. If you need help installing the libraries, CLICK HERE for a quick tutorial.

Step 4

You can now start writing the code to get this all working:

First, clear the IDE window. Then, include the aforementioned libraries:


#include <DS18B20.h>
#include <LCD_I2C.h>

Initialize the KY1602 I2C LCD driver (address 0x27 in this example) and specify the LCD display (in this case 16 characters, 2 rows):

   
DS18B20 ds(12);
LCD_I2C lcd(0x27, 16, 2);

Initialize the LCD display and turn on the LCD backlight. This is done inside the void setup function:

   
void setup() {
lcd.begin();
lcd.backlight();
}

Start a while loop. This is done inside the void loop function:

   
void loop() {
while (ds.selectNext()) {

Set the cursor to the first character and display the temperature in ºF and ºC:

   
lcd.setCursor(0,0);
  lcd.print(ds.getTempC());
  lcd.print((char)223);
  lcd.print("C");
  lcd.setCursor(0,1);
  lcd.print(ds.getTempF());
  lcd.print((char)223);
  lcd.print("F");
  }

Choose how often to update the screen (in this case, 800ms):

   
  delay(800);
}

The completed code should look like this:

   
#include <DS18B20.h>
#include <LCD_I2C.h>

DS18B20 ds(12);
LCD_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.begin();
  lcd.backlight();
}

void loop() {
  while (ds.selectNext()) {
  lcd.setCursor(0,0);
  lcd.print(ds.getTempC());
  lcd.print((char)223);
  lcd.print("C");
  lcd.setCursor(0,1);
  lcd.print(ds.getTempF());
  lcd.print((char)223);
  lcd.print("F");
  }
  delay(800);
}

Step 4

Press the “Upload” button at the top (button with tick, located below “File”). The IDE will now compile the code and upload it to your Arduino (this will take a few moments).

Step 5

Done! If the connections are correct and there are no errors with the code, the LCD should display the temperature.