Week 7- Journal

• For this week the assignment was to code and develop a smart device using Arduino Uno and tinker cad, and Arduino IDE for the code and implement the circuit in real life with an enclosure made of cardboard 

• I decided to modify week6 project by adding DHT sensor and Led with and enclosure for smart home or office

• https://www.instructables.com/NowGuard-Security-System 

inputs:1- ultrasonic sensor has 4 pins (vin on volt / ground pin /tigger on pin 2 on arduino / echo on pin 4 on arduino )

2-temprature sensor act as DHT sensor has 3 pins 1 for  volts 2 for ground and 3rd pin on A5 on ardunio as an analogue input.

out put: 1-bazzer has 2 pins ( pin 6 on Arduino ( analogue output ) and ground)

2-led  has 2 pins one on pin 7 on arduino as digital output and the other pin on ground 

the ground is the same in the whole circuit

after making the circuit on tinkercad i wrote the code on the arduino IDE before uploading it on the arduino 

powering arduino by 5 volt adaptor on5v  arduino and the the ground pin 

the ground is the same for the whole circuit

first i started by downloading the DHT library to be able to call it in my code  and define variables

here the DHT sense the temperature and put it in t as a float variable

• the condition is when the ultra sonic detects object in 20 cm distance or the DHT sense 30 degree the bazzer gives alarm and the led is on

 i used a serial monitor  to know the temperature changing 

here is the final step and the project showes when the ultrasonic detect object or the DHT sense temperature 30 or more the bazzer give alarm and the led is on

Really, what I learned this week will help me greatly in programming my final project as it already includes more than one output. 

https://www.tinkercad.com/things/d79nMo8IynA-grand-kup-lahdi/editel?sharecode=KvTpU_umMmd7614KvhD6GfB5FVphHB5H0veRKrOhLYs

https://drive.google.com/drive/folders/1Fc1yhpRv5GoowwDsG27bybdGIdl6Ru4T?usp=share_link