Alligator Board

Example Development

Release status: working

Description	Alligator Board
License	CC-BY-NC-SA
Author	User:3D Artists
Contributors
Based-on	Arduino Due
Categories	Electronics
CAD Models	https://github.com/3dartists/AlligatorBoard
External Link	http://www.3dartists.org

The Alligator Board is designed to be a complete and reliable solution as RepRap 3D printer electronic control board. The base module features everything you need to build a standard 3D printer, and with the expansion piggy this is the most complete solution for complex 3D printer.

It is based on the 32 bit Cortex M3 ATSAM3X8EA-AU microcontroller (Arduino-Due-Compatible). This represents a big step towards greater computing power, compared to the existing solution based on 8 bit mcu. This product is well suited for any kind of 3D printer, and is the ideal solution for Delta models, requiring more complex computation.

Main Features

Main Features:

• CPU Cortex M3 Atmel ATSAM3X8EA-AU, Arduino-Due-Compatible
• High Current connector for power input, bed and hot-end heaters

• Filtered Power Supply Input 12-24Vdc
• 4 Stepper Motor driver based on Texas Instrument DRV8825, running at 1/16 or 1/32 microcstep, up to 2.5A firmware configurable current and step size - no trimmer and no dip-switch
• 6 End-Stop input compatible with both mechanical and optical/magnetic solution
• High current Hot-End Heater driver output (High-Current connector)
• High current Bed Heater driver output (High-Current connector)
• 2 Precision analog input for temperature measurement with RTD (compatible with external adapter for thermocouple)
• 2 External FAN output with PWM speed control
• External 32Mbit Flash memory, in addition to the 64Kbit EEPROM
• USB to Virtual COM port interface (micro USB connector)
• Native USB port (micro USB connector)
• microSD Slot
• 10/100 Ethernet Port with unique MAC address pre-programmed chip
• Expansion connector with 3 UART or 6 GPIO with firmware selectable +3V3/+5V logic levels
• 26pin Raspberry-PI Compatible expansion connector
• 3 Generic PWM open drain output for general porpouse application (ex. RGB LED)
• Expansion connectors for user customizable piggy module

Wiring Scheme

Wiring Scheme Example:

Links

• 3D Artists Home Page
• Alligator Board Repository on GitHub
• Alligator Board Repetier Firmware on GitHub
• 3D Artists Facebook Page

Further reading

• List of electronics
• Comparison of Electronics