Keyestudio ARDUINO maker learning kit, Manual

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36
{
val=digitalRead(inpin);// read the level value of pin 7 and assign if to val
if(val==LOW)// check if the button is pressed, if yes, turn on the LED
{ digitalWrite(ledpin,LOW);}
else
{ digitalWrite(ledpin,HIGH);}
}
//////////////////////////////////////////////////////////
Result
When the button is pressed, LED is on, otherwise, LED remains off. After the above process, the
button controlled LED experiment is completed. The simple principle of this experiment is widely
used in a variety of circuit and electric appliances. You can easily come across it in your every day
life. One typical example is when you press a certain key of your phone, the backlight will be on.
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Project 7: Responder experiment
Introduction
After completing all the previous experiments, we believe you will find this one easy.
In this program, we have 3 buttons and a reset button controlling the corresponding 3
LEDs, using 7 digital I/O pins.
Circuit connection
Connection for R3: