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Ethernet Shield with Micro SD Slot for Arduino Uno

This Arduino-Compatible Ethernet Shield which is based on the Wiznet W5100 Ethernet Chip gives you an easy way to get your Arduino Board Online. Fits all version of Arduino Main Boards. Includes: Arduino Uno, Arduino Mega 1280 and Arduino Mega 2560.
$13.99

4 Channel 5V Relay Module

The 4 channel 5V relay module provides 4 optically isolated inputs that accept a wide range of voltage, including the 3VDC and 5VDC signals available on the Arduino. This is a great way to switch on or off AC or DC loads using your Arduino.
$7.99

BMP085 Barometric Pressure Sensor

This low-cost sensor breakout board which can be connected directly with a microcontroller via a I2C bus. Bosch's BMP085 is a rock-solid barometric pressure sensor. It features a measuring range of anywhere between 300 and 1100 hPa. As a bonus, the BMP085 also provides a temperature measurement, anywhere from 0 to 65°C.
$7.99

5V 1000mA USB Port Power Adapter

This is a 5V 1000mA USB power adapter that works with Raspberry Pi. The input is 100V to 240V, so it works in any country. The adapter does not have a cable, instead there is a USB 'A' type port on the bottom, where you can plug any USB cable in.
$5.95

Aluminum Heatsink for Raspberry Pi Model B

This is a 3 pieces aluminum heatsink kit for the Raspberry Pi Model B Rev2.0. The heatsink will reduce the risk of hardware failure and is a must for the overclocking.
$3.99

Motor Shield for Arduino Uno

The motor shield is a full-featured motor board that can power up two servos, four bi-directional DC motors and two stepper motors.
$11.99

HC-06 Bluetooth Wireless Module

HC-06 Bluetooth wireless module allows your device to both send or receive the TTL data via Bluetooth technology without connecting a serial cable to your computer. Just Power, Ground, RX, TX and you can send data to/from Arduino. HC-06 only supports Salve Mode.
$10.99

Blue Backlight 1602A LCD Module

This standard blue backlight HD44780 LCD is great for your arduino projects. It supports 16 characters wide and 2 rows in white text on blue ground. Connection port is 0.1" pitch, single row for easy breadboarding and wiring.
$5.99