Arduino Ultrasonic sensor with LEDs to measure the distance of object like scale. When an object comes close the ultrasonic sensor indicates the distance using led. When red led is on that means the distance of an object is 50cm and yellow led is on that means the distance of an object is 4cm. ultrasonic sensor led project is some like a scale to finding distance measure of an object. we can easily extend the range of the Hc-sr04 sensor to changing code. The HC-SR04 ultrasonic sensor uses to measure the distance to an object. It comes complete with ultrasonic transmitter and receiver modules. Hc-sr04 transmit high-frequency sound and when an object detects then reflect the signal to echo.
I MADE A coronavirus sensor
I MADE A coronavirus sensor say that there was a person there behind the sensor or they were holding it once the first red light goes on.
BeginnerFull instructions provided-60 minutes1,495