A small arduino project to detect movement of a person using a PIR sensor and alerting via a small buzzer and some flashing LEDs. For the LED indication, I decided to make the LEDs fade in and out, as opposed to On and Off.
I added a button to toggle the sensor into silent mode, which is indicated by a green light when the device is in silent mode. This simply stops sounds.
Note: my PIR sensor is set that, when there's movement, it stays active for a few seconds after the movement stops. Some return true when the movement stops. Mine has a delay. This can be changed, but you need some l33t soldering skills, or one with jumpers.
This project makes use of an Arduino UNO, but can be used on any Arduino. I've run it on a Particle Photon as well.
- 1 xPIR Motion detector sensor
- 3 x LEDs (I used Red and Blue, as they're used as an alarm, and it reminded me of a cop car, and one for the 'Silent' mode)
- 3 x 220ohm resistors
- 1 x Pizzo buzzer
- 1 x toggle button
- 1 x Breadboard (I didn mine on a half size)
- Around 10 jumper wires.
The while thing sits on a bradboard, with the sensor hanging lose, so that it can be moved around. I'd put longer leads on the PIR, which allows it to be moved independently of the board.
I use the following pins:
- Buzzer: A0
- LED 1: 10
- LED 2: 9
- PIR: 4
