Week 6 - Journal

the idea came from my car parking sensor , i wanted to make a circuit that give me a warning thru three led depends on the distance and it changes from green to yellow to red

i used tinkercad to build my circuit and build my code then test it before build it with real components

and will use arduino ide to upload my code to arduino uno

that's my circuit on tinkercad

i used arduino uno and i attached three led green to pin 5 and yellow to led 6 and red to pin 7
and the ultrasonic trigger to pin 9 and echo to pin 8 an

i'll power the ultrasonic from 5v pin

and power the Arduino uno with usb 5v

then i started to add code blocks to run my circuit correctly

i started with control block if condition and input reading my ultrsonic trigger and echo pins , then a math to define the distance for each lamp

the green led will turn on in distance from 55cm to 35 cm

the yellow led will turn on in distance from 34cm to 2cm

the red led will turn on in distance below 20cm and will blink

i started to build my circuit as tinkercad design

then i uploaded the code thru arduino ide software

and tested it and it worked correctly

i had problem in my code before using using if condition < or > without adding and condition so tinkercad was turning on all lamps each if condition

so i defined the distance to let each led work from and to specific distance

and i knew the solution thru instructor muhanad in the extra zoom help session

and thru slack , alaa , rawan , ahmed osama , ahmed atef