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…..

Breaks out all the Arduino headers to handy screw terminals, making it really easy to connect external wires without using a soldering iron. The center area of the shield is also a prototyping area, allowing you to add your own parts to suit your project. A blue “power” LED shows when your Arduino is powered….

This shield allows your Arduino to control a door lock using an electric strike plate and one of a number of commonly-available RFID modules, and is based on the circuit described in the “RFID Access Control System” project in the book “Practical Arduino”. Supported modules include: ID12 ID20 RDM630 RDM880 HF MultiTag Features: On-board 9V….

A simple prototyping shield specifically designed to be short enough to clear the RJ45 jack on an Ethernet shield.

General-purpose prototyping shield designed to provide maximum prototyping area. Supporting parts are pre-fitted as surface-mount components. Includes a reset button wired to the Arduino reset line; a general-purpose pushbutton switch with pull-up resistor; blue power LED; general-purpose red and green LEDs with active-high inputs; and two smoothing capacitors.

The Freetronics Ethernet Shield is based on the same Wiznet W5100 chip used by the official Arduino Ethernet Shield, and is 100% compatible with the Ethernet library and sketches. It also incorporates support for PoE (Power-over-Ethernet) using either official 802.3af (48V) or lower voltage DIY injectors. Spare shield area is available as a prototyping area.

Very simple prototyping shield designed to provide maximum general-purpose prototyping area. Also includes mounting locations for a reset button, a power LED, and two smoothing capacitors. Supplied as a bare PCB without headers or other parts.

2 channel H-bridge for driving either two DC motors or a 4-wire bipolar stepper motor. Uses Allegro A4954 dual channel H-bridge driver IC, with minimum 8V max 40V 2A peak rating with PWM control of both H-bridges. External power connection for motor power supply, which can be jumpered to the Arduino to power the Arduino….

Drive up to 8 relays from your Arduino using just 2 I/O pins. Communicates with your Arduino using I2C, so you can stack several shields together to drive 16, 24, or more outputs. I2C connections are linked by default to Arduino pins A4 and A5, but can be switched to use the R3 headers using….

16-character by 2-line display with input buttons to allow you to select menu items on the screen. Works in 4-bit mode with the “LiquidCrystal” library included with the Arduino IDE, allowing you to control the LCD with a total of just 6 digital I/O lines. Use of pins D4-D9 was selected so that it doesn’t….