BTT Octopus Controller Board / 3D Printer Control System
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This is one sweet board, perfect for a Voron build.
ARM Cortex-M4 STM32F446ZET6 32-bit microcontroller at 180MHz
Support for Klipper and Marlin firmwares
Interfaces for Raspberry Pi (USB and UART by GPIO)
Up to 4 hotends available
Integrated DCDC to provide 12V(4A), 5V(8A) and 3.3V(1A) power supply
Up to 6 controllable fans and 2 without control with the possibility of voltage selection (Vin, 12V and 5V)
Protection against short circuit on fans, something very important since it is one of the most common problems
USB-C connector that allows serial emulation to print using USB
Compatibility with almost any screen
High performance MOSFETs, improve heating speed and efficiency
Protection fuses easily replaceable
Double motor output for the Z axis
Improvements in the bootloader, supporting the update by USB (recommended) and DFU (advanced users)
32K EEPROM (AT24C32)
Connectors for RGB LEDs and Neopixel
Connector for WiFi interface
PT100 interface (requires INA8 amplifier 26AIDR welded to plate in socket)
Protection against short circuit in thermistors, another great improvement applied to the fans. It allows reusing these pins for other tasks with a pin that bypasses these protections
BLTouch support and the like with a connector intended for them and usable by other ABL systems. The PROBE port was added extra protection with an optocoupler so as not to need to use a BAT85 diode
CAN BUS via ethernet connector for future expansion modules
SPI BUS expansion port for SPI modules such as MAX31865
I2C BUS expansion port for I2C modules
Support for modules Relay and UPS
BTT Octopus
FYSETC Spider
Processor
Cortex-M4 STM32F446 (180MHz)
Cortex-M4 STM32F446 (180MHz)
Drivers
8 drivers
8 drivers
Hotends
4 hotends + 1 heatbed
3 hotends + 1 heatbed
Fans
8 connectors (5V, 12V, 24V)
6 connectors (5V, 12V, 24V)
6 manageable + 2 normal
3 manageable + 3 normal
Endstops
8 Endstops
6 Endstops
Power
4 connectors
3 connectors
(PWR IN, BED IN, BED OUT, MOTOR PWR)
(PWR IN, BED IN, BED OUT)
BLTouch
Yes, dedicated connector
Yes
Sensorless
Yes
Yes
CANBus
Yes
Yes
Raspberry Pi
Yes
Yes
(source: https://3dwork.io/en/btt-octopus/ - review for a major cheat sheet on this board!)
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