Specification: Working Voltage : 5V(DC) Static Current: Less than 2mA. Output Signal: Electric frequency signal, high level 5V, low level 0V. Sensor Angle: Not more than 15 degrees. Detection Distance: 2cm-400cm. High Precision: Up to 0.3cm Input Trigger Signal: 10us TTL impulse Echo Signal : output TTL PWL signal โค้ดตัวอย่างการใช้งาน /* HC-SR04 Ping distance sensor: VCC to arduino 5v GND to arduino GND Echo to Arduino pin 7 Trig to Arduino pin 8 This sketch originates from Virtualmix: http://goo.gl/kJ8Gl Has been modified by Winkle ink here: http://winkleink.blogspot.com.au/2012/05/arduino-hc-sr04-ultrasonic-distance.html And modified further by ScottC here: http://arduinobasics.blogspot.com.au/2012/11/arduinobasics-hc-sr04-ultrasonic-sensor.html on 10 Nov 2012. */ #define echoPin 7 // Echo Pin #define trigPin 8 // Trigger Pin #define LEDPin 13 // Onboard LED int maximumRange = 200; // Maximum range needed int minimumRange = 0; // Minimum range n...
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