Bag Items:

1. Arduino UNO UNO
2. Jumper Wires
3. USB Cable
4. Foam sheet
5. Battery and DC Jack
6. Glue gun
7. Ultrasonic sensor
8. Seven Segment Display
9. Cutter
10. Breadboard
11. Scale

"

We can make a digital scale by using the ultrasonic sensor and 7 Segments LED display. With the help of ultrasonic sensors, we can calculate the distance which can be printed on 7 segments LED. Hence our need for digital scale can be fulfilled.

    #include  

#include  
#include  

int trig =10; 
int echo =9; 
int MAX_DISTANCE=200; 
NewPing sonar(trig, echo, MAX_DISTANCE); 

int CLK=8; 
int DIO=7; 
int TEST_DELAY =500; 
TM1637Display display(CLK, DIO); 

void setup() { 
Serial.begin(9600); 
} 

void loop() { 
display.setBrightness(0x0f); 
uint8_t data[] = { 0x0, 0x0, 0x0, 0x0 }; 
display.setSegments(data); 
int distance = sonar.ping_cm(); 

Serial.print("Ping: "); 
Serial.print(sonar.ping_cm()); 
Serial.println("cm"); 
display.showNumberDec(distance, false, 3,1); 
delay(50); 
}