How to build an Arduino sound detector Alarm Project - Hackster.io
Adafruit
CQRobot Ocean: non-contact water/liquid level sensor. Compatible with Arduino, Raspberry Pi. for industrial production, aquarium, chemical liquid, agriculture, gardening etc.: Amazon.de: Business, Industry & Science
GSM Based Home Security System Working with Applications
How to disconnect sensor Vcc line during sleeping period to save battery power? - Sensors - Arduino Forum
Newb want to detect crack development in concrete. - Project Guidance - Arduino Forum
No signal result in the serial monitor - Project Guidance - Arduino Forum
Security Sensor Shield Kit for Arduino. | Jaycar Electronics
Glass-break detector using accelerometer
Home Security System With Arduino Mega – Artun Electronics
Security / Automation Sensors using Arduino -
GitHub - practicalarduino/SecuritySensors: Arduino sketch to read the status of security sensors connected via EOL (end-of-line) circuitry
pzsmocn Level Detection Module - Liquid Level Sensor with DIP Switch, Support for Arduino and Raspberry Pi Motherboards, Suitable for The Outer Wall of Non-Metallic Containers.: Amazon.de: Gewerbe, Industrie & Wissenschaft
Sound Detector with Visual Alerts #piday #raspberrypi @Raspberry_Pi « Adafruit Industries – Makers, hackers, artists, designers and engineers!