Erhao's Auarts Blog

My idea is to make a smart trash can, by using ultrasonic sensor and steering gear to let the trash can detect the garbage and then open the lid automatically. Garbage disposal has always been one of the problems that plague human development. When I walk on the street, I often find that some garbage is not thrown into the trash can, but is discarded in some public places. I hope my work can remind people to put rubbish in the trash can and protect the environment together.

  Code: void setup () {   // put your setup code here, to run once: Serial . begin ( 9600 ) ; pinMode ( 9 , OUTPUT ) ; pinMode ( 10 , OUTPUT ) ; } void loop () { // put your main code here, to run repeatedly: if ( analogRead ( A1 ) < 200 ){ digitalWrite ( 9 ,HIGH ) ; digitalWrite ( 10 , LOW ) ; } if ( analogRead ( A1 ) > 200 & analogRe ad ( A1 ) < 800 ){ digitalWrite ( 9 ,LOW ) ; digitalWrite ( 10 , LOW ) ; } if ( analogRead ( A1 ) > 800 & analogRe ad ( A1 ) < 1000 ){ digitalWrite ( 9 ,LOW ) ; digitalWrite ( 10 , HIGH ) ; } } This project is a device that controls the left and right LED switches through a variable resistor. By rotating the male figure in the middle, when he faces the female figure on the left or right, it can make the heart shape under the box light up. The problem I'm having is how to hide my circuit and how to link the male doll to the variable resistor. In this regard, my solution is to use cardboard to only make a box to hide t...