A mini PIR-Arduino alarm
Let's get started. We are going to create a setup in which an LED flashes when motion is detected by the PIR sensor. This is what the setup should look like when connecting the Arduino to the PIR Sensor:
Basically, the connections are as follows:
- GND → GND
- VCC → 5V
- OUT → D02 (digital pin 2)
Note
Digital pins are denoted using D and analog pins are denoted by A. So digital pin 13 is D13 and analog pin 2 is A02.
Open Arduino and load the sketch called PIR_LED.ino
, or copy this:
int ledPin = 13; // use the onboard LED int pirPin = 2; // 'out' of PIR connected to digital pin 2 int pirState = LOW; // start the state of the PIR to be ...
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