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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

CP2102 USB to UART TTL Converter Module

CP2102 chip from SiLabs is a single chip USB to UART bridge IC. CP2102 can be used to migrate legacy serial port based devices to USB. Hobbyists can use it as a powerful tool to make all kinds of PC interfaced projects.
$4.99

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

SD Card Breakout Module

SD card breakout module is a simple module that facilitates connections between SD memory card and the microprocessor systems. This breakout board has been tested with Arduino and it works perfectly well.
$3.99

ENC28J60 Ethernet Breakout Board

ENC28J60 Ethernet Module utilizes the new Microchip ENC28J60 Stand-Alone Ethernet Controller IC featuring a host of features to handle most of the network protocol requirements. The board connects directly to most microcontrollers with a standard SPI interface with a transfer speed of up to 20MHz.
$8.99

HC-05 Bluetooth Wireless Module

HC-05 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-05 supports Master and Slave Mode.
$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

HY-SRF05 Ultrasonic Distance Sensor

Ultrasonic ranging module HY-SRF05 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The module includes transmitters, receiver and control circuit.
$4.99