Photo interrupter module and a digital interface, built-in 13 LED build a simple circuit to produce.photo-interrupter warning lamp
It comes with digital interfaces of the LED, the light blocking access number 3 sensor interfaces,sensing when the light interrupter
Device senses a key signal, LED lights, otherwise off.
Routines source code:
int Led = 13 ;// define LED Interface
int buttonpin = 3; // define the photo interrupter sensor interface
int val ;// define numeric variables val
pinMode (Led, OUTPUT) ;// define LED as output interface
pinMode (buttonpin, INPUT) ;// define the photo interrupter sensor output interface
void loop ()
val = digitalRead (buttonpin) ;// digital interface will be assigned a value of 3 to read val
if (val == HIGH) // When the light sensor detects a signal is interrupted, LED flashes
digitalWrite (Led, HIGH);
digitalWrite (Led, LOW);
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