Alert Welcome Sensor System

Last crawled date: 4 years, 7 months ago

This is a sensor system that could be used to detect whether a person is approaching.
This is a demo video that shows the feature of this.https://drive.google.com/file/d/18dXX_CxkkV_r9b6Lb3qpZcPS9rGw1GqA/view?usp=sharing
There are 4 main function:
1: The buzzer remain silent when no one is coming, and the light shows green
2: when someone is close enough; in other word, is approaching, the light will turn red
3: when someone is approaching, the light will blink in blue, the the buzzer would sing twinkle twinkle little star
4: when the switch is press, the song would switch between song of joy and little star
There are some scenerio I think this product could be applied to
1: the restaurant would be iused this to detect whether customer are coming
2: people with impaired vision could use this to know whether people is approaching
3: people with hearing disability could also use the light to know whether people is approaching
The circuit design for this is quite simple, the design could be easily interpreted by see the picture that I upload.
Here is a description of the circuit
1: Connect the power and input pins with the ultrasonic sensor, the modulation could report the distance to the computer
2: The light is connected with some output pin, which could tell the light to change color based on the if statement of distance detect, also some resistor to prevent damage
3: The buzzer is connect with output pin, which could send different voltage or notone to play the music
4: the switch is connect with a input pin to tell the laptop whether the switch is pressed