The RAMPS 1.4 board is an upgrade to v1.3 as it now uses surface mount LEDs, resistors, and capacitors
The modular design includes plug in stepper drivers and extruder control electronics on an Arduino MEGA shield for easy service, part replacement, upgrade-ability and expansion.
Additionally, a number of Arduino expansion boards can be added to the system as long as the main RAMPS board is kept to the top of the stack.
Six different resolutions: full step, half step, 1/4-step,1/8-step,1/16-step,1/32-step.
It is controlled via 4 pins and can connect directly to the 3, 4, 5 and 6 pins on a board like the Arduino UNO.
This breakout board has four step indicator LED’s to indicate which coil is being powered, and an onboard on/off jumper to quickly set the board to on or off status before plugging in the power.
This breakout board typically draws more current than a standard Arduino can supply, so if you are using this board in conjunction with an Arduino Board, be sure to use a separate power supply at 1A. This will ensure that this board doesn’t damage the Arduino or other components, and that the stepper motor will be able to draw more than enough power to work at optimal order.