Automatic Pet Watering System

The automatic watering system simple just read the water level in the water bowl with a HC-SR04 Ultrasonic Sound Sensor. It measure the distance to the surface of the water. If the level is less then 3cm for more than 30sec it triggers a 5V relay whit a NO-contact . The relay are controlling a 12V DC supply to a mini watering pump in the water tank.

Step 1: What You Need?

1 x Arduino Pro Mini 
1 x General Purpose Transistor NPN ( PN2222A)
1 x Relay (generic) 
1 x Ultrasonic Sensor 
1 x RGB LED (Common Cathode)
1 x LCD 

1 x Breadboard or Mini Breadboard 

1 x 12V DC Waterpump 

Optional
 Soldering Iron & Solder
USB To Power Jack Cable
Desoldering Pump 

Helping Hand Soldering Gun Holder

Don't have components? Don't worry. Just click the component's name. 

Step 2: Build Your Circuit. 

Step 3: Upload The Code. 

You also can view here for more.

Download:

Arduino IDE

Source: https://www.hackster.io/SindreKragsrud/automatic-pet-watering-system-9bfc46

1 way channel relay Arduino Arduino Pro Mini Hard HC LCD project Relay RGB LED SR04 Ultrasonic Range Finder