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8 Channel 5V Relay Module

The 8 channel 5V relay module provides 8 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.
$10.99

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

9V DC 1000mA Power Adapter

9V 1000mA power adapter with 5.5mm/2.1mm barrel jack. This power adapter is great for your Arduino projects. It will provide steady 9V up to 1000mA of current draw. The input is 100V to 240V AC, which works worldwide.
$5.99

Micro SD Card Breakout Module

Micro SD card breakout module is a simple module that facilitates connections between micro SD memory card and the microprocessor systems. This breakout board has been tested with Arduino and it works perfectly well.
$7.99

140 Piece U Shape Jumper Wire

Make your prototyping neat and nicer looking. This box includes 14 various lengths of 22AWG wire - 2, 5, 7, 10, 12, 15, 17, 20, 22, 25, 50, 75, 100, and 125mm - 10 pieces of each. Various colors of jumper wire, perfectly fit for breadboard and protoboard. 140 pieces a box, get one for use in your future project again and again!
$5.99

Mega Sensor Shield for Arduino Mega

The Mega sensor shield v2.0 allows you to hoop up the sensors directly to Arduino Mega 1280, Arduino Mega 2560 or Arduino Mega ADK without the use of the breadboard.
$8.99

USB to TTL Serial Console Cable for Raspberry Pi

The USB to TTL serial console cable is the easiest way to connect to your Raspberry Pi/Microcontroller/WiFi Router serial console port without network connection.
$6.99

Green Backlight 1602A LCD Module

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