RAMPS 1.4 5x Stepper motor driver mount shield for Arduino (3D)

The RAMPS 1.4 shield (RepRap Arduino Mega Pololu Shield) is an expansion board for the Arduino Mega that consolidates the electronics required to control a RepRap-style 3D printer. It supports up to five stepper motor drivers and manages axes, extruder, heated bed, and cooling fans.

Specifications

• Compatible with Arduino Mega 2560 and RAMPS 1.4.
• Sockets for 5 stepper motor drivers (DIP-18 format, e.g., A4988, DRV8825).
• 3 MOSFETs for heater/fan outputs and 3 thermistor circuits.
• 5A PTC fuse for logic, drivers, and D9/D10 outputs (max 30V rating).
• 11A PTC fuse dedicated to D8 output (heated bed, max 16V rating).
• Servo-style connectors for endstops, motors, and LEDs.
• I2C and SPI pins available for future expansion.
• All MOSFETs connected to PWM pins.
• USB Type-B connector and SD card slot (add-on).

Voltage and current notes

This board was designed for 12V systems. While it can run at 24V with caution, exceeding 15V on a standard setup is not recommended, especially with lower-spec components.

For a printer with a heated bed, use a power supply capable of delivering 12V at more than 16A (20A+ is preferred).