This is a 5V 4-Channel Relay module. It can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM or MSP430.
Documentation:
Schematic
The A4988 stepper motor driver carrier is a breakout board for Allegro's easy-to-use A4988 microstepping bipolar stepper motor driver and is a drop-in replacement for the A4983 stepper motor driver carrier. The driver features adjustable current limiting, overcurrent protection, and five different microstep resolutions. It operates from 8 - 35...
The new version of XBee Shield is a standardized and stackable shield compatible with Arduino. You can easily stack any modules from the Bee series onto it and build a wireless network for your project. It is also equipped with level conversion functionality, which enables a two-way conversion between high...
programmable 20 MHz Atmel ATmega48 AVR microcontroller (4 KB flash, 512 bytes SRAM, 256 bytes EEPROM) or Atmel ATmega328P AVR microcontroller (32 KB flash, 2 KB RAM, 1 KB EEPROM)18 user I/O lines, 16 of which can be used for digital I/O and 8 of which can be used as...