When HN users recommended it
1 HN user recommended this in 2014, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
Emgreat Detecting Pyroelectric HC SR501 Arduino
Amazon's catalog no longer lists this product (checked 2026-11-02). The name comes from the link HN users posted.
A Raspberry Pi with motion detection and SMS.
I've built one using an old nokia that supports AT commands.
Pretty fun stuff and no soldering required. Next up I'll try adding a camera and send MMS messages through the mobile phone with photos when motion is detected.
Helpful links:
http://www.amazon.co.uk/Emgreat-Detecting-Pyroelectric-HC-SR...
http://www.amazon.co.uk/Pyroelectric-Infrared-Motion-Sensor-...
http://www.raspberrypi-spy.co.uk/2013/01/cheap-pir-sensors-a...
http://www.adafruit.com/products/189
https://www.modmypi.com/blog/raspberry-pi-gpio-sensing-motio...
http://raspberrypi.stackexchange.com/questions/13334/how-can...