Ultrasonic Motion Detector Light Starter : THE WATCHER

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About: hey, this is Neel. and i like to play with electronics to make world better place.

this is simple motion detector with ultrasonic sensor. It detects the person and trigger the relay which leads to light for 30 seconds for each trigger.

Step 1: the Components

for THE WATCHER

1. arduino

2. 5v relay

3. ultrasonic sensor

4. usb wire

5. plastic box

6. 5v power supply

these components are required for the THE WATCHER

Step 2: The Coding

In this project coding is very easy. You can download the code for the link below and you have to change the distance as your room. keep distance 5 less than the length of the room.

here is the link for my video >>>> https://youtu.be/iMs63-4nVs8 <<<<

Step 3: Connections

the ultrasonic sensor connected as

trig pin -> pin 8

echo pin -> pin 7

vcc- > 5v pin

gdd -> gdd

the relay connections

signal pin (INT) -> pin 3

vcc-> vin

gdd to gdd

power supply to arduino by the usb cable and mobile charger 5v 1amp

*the simulation software ultrasonic sensor has only 3 pin but i have used hc-sr04 which has 4 pin so connect the ultrasonic sensor as i describe above to arduino pin.

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