Fast shipping. Comes with connectors for crimping.
Sale
BIGTREETECH EBB36 EBB42 CAN Tool Board with MAX31865
Price range: $21.43 through $119.94
Pay now, in 4 interest-free payments of $5.36, or over 3–6 months
4 interest-free payments of $5.36
BIGTREETECH EBB42 CAN is a compact extruder breakout board with CAN and USB communication, supporting Klipper firmware and PT100/PT1000 temperature sensors for 3D printers.
↗
Estimated Delivery Time3–7 business days
Compact extruder control board
The BIGTREETECH EBB42 CAN is engineered specifically for 42-stepper extruder motors, offering a streamlined communication setup via CAN bus or USB, reducing cable clutter and simplifying printer wiring.
This breakout board is compatible with Klipper firmware, making it ideal for modern 3D printer builds requiring precise motor control and temperature management.
Robust thermal and electrical protection
It includes advanced protection circuits safeguarding the main control chip from thermistor leakage currents and reverse voltage, ensuring reliable and safe operation during high-temperature printing.
Anti-flyback diodes protect MOS tubes on heating rod and fan outputs, while onboard ESD protection on the USB port guards against static electricity damage.
- Thermistor protection circuit to avoid chip damage
- Anti-reverse power connection protection
- ESD protection chip for USB port
- Anti-flyback diodes on heating and fan ports
Flexible sensor and interface options
Supports both 2-wire and 4-wire PT100/PT1000 sensors via onboard MAX31865 adapter, selectable pull-up resistors allow customization based on sensor type.
Expansion interfaces include EndStop, I2C for filament detection and clogged nozzle sensing, RGB lighting, and CAN for future add-ons or networked boards.
- Onboard MAX31865 for PT100/PT1000 sensor support
- Selectable pull-up resistors via jumper wires
- Multiple I/O: EndStop, I2C, Probe, RGB
Power and motor driver specifications
Operates on 12 to 24 volts DC with a maximum current draw of 9A; logic voltage at 3.3V ensures compatibility with most modern electronics.
Stepper motor interface uses an onboard TMC2209 driver featuring UART communication for smooth motor operation, supporting advanced stepper motor features.
- Input voltage DC 12V-24V, 9A max
- Logic voltage DC 3.3V
- Onboard TMC2209 motor driver in UART mode
U2C USB to CAN bus interface module
The accompanying BIGTREETECH U2C converts USB ports to CAN bus, enabling better communication over long distances and robust anti-noise signal transmission.
Supports multiple CAN outputs (up to 3 in version 2.1), firmware updates via SWD or DFU, with ESD protection integrated for enhanced hardware safety.
- Converts USB to CAN bus for printer systems
- Supports long-distance communication and multiple nodes
- Version-specific CAN outputs: V1.0 has 1 CAN, V2.1 has 3 CAN
Key specifications
- Dimensions: 40mm x 40mm (installation 31mm x 31mm, M3 screws)
- Microprocessor: ARM Cortex-M0 STM32F072C8T6 48MHz
- Heating rod max output current: 5A
- Two CNC fan interfaces max output: 1A (peak 1.5A)
- USB interface: Type-C
- Onboard sensor: ADXL345
- Temperature sensor interface options for 100K NTC, PT100/PT1000
What's in the box
- EBB42 CAN extruder breakout board
- MAX31865 sensor module onboard
- Connectors and jumper wires
- Mounting screws and double-way studs
Product FAQ
Frequently asked questions
01 What is the BIGTREETECH EBB42 CAN designed for?
It is designed as an extruder breakout board for 42 extruder stepper motors, simplifying wiring via CAN or USB communication.
02 Which firmware does EBB42 CAN support?
Currently, it supports the Klipper firmware exclusively.
03 Can I update the firmware via USB?
Yes, the board has BOOT and RESET buttons to enable firmware updates via DFU mode over USB.
04 Does the board support PT100 or PT1000 sensors?
Yes, it supports both PT100 and PT1000 temperature sensors with onboard MAX31865 and selectable pull-up resistors.
05 What protection features are included?
The board has protection circuits on the thermistor to prevent damage from leakage current, anti-flyback diodes on heating rod and fan ports, anti-reverse connection protection on the power interface, and ESD protection on the USB port.
06 What are the communication interfaces available?
It supports communication via CAN bus or USB Type-C interfaces.
07 What is the input voltage range for the board?
The input voltage range is DC 12V to 24V with a maximum current of 9A.
08 What motor driver is onboard?
The board includes an onboard TMC2209 stepper motor driver working in UART mode.
09 What expansion interfaces does the board offer?
It offers EndStop, I2C, Probe, RGB, PT100/PT1000 interfaces, USB, and CAN bus expansion.
10 What does the BIGTREETECH U2C module do?
The U2C is a USB to CAN bus converter module allowing connection of 3D printer motherboards and expansion boards via CAN bus with enhanced reliability and longer transmission distance.
Discussion
4.9
Based on 32 reviews
I'm already using it, everything is working perfectly.
In addition to the board, the kit also included a USB adapter and 2 meters of cable (one end is minifit like on the first generation ebb36, the other is like on the second generation, compatible with connectors like on the sht36 from Mellow). Quite unexpected and very relevant. All sockets have a 2mm pitch.
Btt manta e3ez with cm4 on the motherboard, ebb42 via can
I checked the official btt documentation.
For the ebb42 v1.1/v1.2 with stm32g0b1, btt explicitly specifies:
Mcu: stm32g0b1
Crystal: 8 mhz
Can via pb0/pb1
Can speed: 1 mbit/s.
V1.2.1 uses the same can configuration as v1.1; only the hotend output changed from pa2 to pb13.
And importantly: btt specifically provides firmware_canbus.bin for v1.1/v1.2.1 for this purpose. We used exactly that firmware and successfully verified it.
So: firmware configuration is not the suspect.
Our current results are now quite strong:
Ebb42:
Stm32 starts normally → ✅
Usb firmware → com3 → ✅
Can firmware → correctly programmed/verified → ✅
Correct official firmware for g0b1 v1.1/v1.2 → ✅
E3ez/can bus:
1 mbit/s → ✅
Can controller error-active → ✅
0 bus errors → ✅
0 rx/tx errors → ✅
E3ez uuid 07cc2c7f1842 → ✅
Ebb42 uuid → ❌
Shipped fast, and included programming kit. the board itself looks quite nice. the ebb 42 v2 is packed.
