Retired: This product has been replaced by the .

This shield allows up to 4 security sensors to be connected to an Arduino with full End-Of-Line (EOL) support to detect tampering with the sensors or cable. End-Of-Line technology allows the system to detect a variety of events using a single cable pair to the sensor, including:

• Sensor triggered.
• Sensor cable cut.
• Sensor cable short-circuited.
• Sensor housing opened (even when system is disarmed)

Supported sensor types include:

• PIR (passive infrared) motion detectors.
• Microwave motion detectors.
• Reed switches.
• Glass break detectors.
• Gas detectors.
• Smoke detectors.

Compatible with the , Arduino Uno, Arduino Duemilanove, and other compatible boards based on the same header format.

The design is identical to the circuit used in the "" project in the book , so this shield is a perfect way to build that project very simply and easily without messing around with a prototyping shield and lots of jumper wires. The full operation of the circuit including the EOL functionality is described in the book.

Features

• Supports 4 sensor channels simultaneously.
• Sensor power supply totally isolated from the Arduino.
• Red "Status" LED for each sensor channel to show sensor activity.
• Green "Power" LED to show when the sensor power supply is active.
• Blue "Power" LED to show when the Arduino is supplying power to the shield.
• Reset button wired through to Arduino reset pin.
• 100nF bypass/smoothing capacitor on Arduino supply rail.
• Overlay guide where you need it: both top and bottom.
• Gold-plated PCB surface: solders easily and very resistant to finger oil, etc.

This shield is available either as a kit for you to assemble yourself, or fully pre-assembled so you can just plug it in and get started right away. It uses through-hole parts so there is no surface-mount assembly required, and takes about 15 to 45 minutes to assemble depending on your level of experience.

Resources