BIGTREETECH EBB 36 V1.2 CAN bus

• With BOOT and RESET buttons reserved, users can update the firmware via DFU mode by USB.

• Added protection circuit on the thermistor avoids burning the main control chip caused by leakage current from the heating rod.

• Users can select the thermistor's pull-up resistor values through a jumper wire for PT1000 support (2.2K pull-up resistors), which makes it convenient for DIY.

• Connect the USB with a jumper cap to get it powered on, which effectively isolates the main control board DC-DC from USB 5V.

• Reserved I2C interface allows for filament broke and clogged detection, and supports other DIY functions.

• Added anti-flyback diodes on the heating rod and fans' ports effectively protect the MOS tube from being burned due to reverse voltage.

• Anti-reverse connection protection on the power interface prevents users from burning the motherboard when mistakenly connecting the reverse power line during DIY.

• Onboard MAX31865 (pictured / optional) supports selecting 2-wire or 4-wire of PT100/ PT1000.

• Supports communication via CAN or USB. The terminal resistor 120R of CAN can be selected through the jumper cap, and it reserves CAN expansion interfaces.

• Equipped ESD protection chip on the USB port prevents the main control board from being broken down by the static electricity of the USB port.

•  The adaptor board is equipped with terminals, female reeds, double-way studs and screws, which are required for DIY, greatly meeting the DIY needs of customers.

• MCU: ARM Cortex-M0+ STM32G0B1CBT6 64MHz with FDCAN bus
• Stepper Driver: Onboard TMC2209 in UART mode, UART address: 00, Rsense: 0.11R
• Onboard Accelerometer Sensor: ADXL345
• Onboard Temperature IC: Max31865 Select 2 / 4 lines PT100 / PT1000 by DIP switch (no Max31865 version have not this feature)
• Input Voltage: DC12V-DC24V 6A
• Logic Voltage: DC 3.3V
• Heating Interface: HotEnd (E0), maximum output current: 5A
• Fan Interfaces: two CNC fans (FAN0, FAN1)
• Maximum Output Current of Fan Interface: 1A, Peak Value 1.5A
• Expansion Interfaces: EndStop, I2C, Probe, RGB, PT100/PT1000, USB interface, CAN Interface
• Temperature Sensor Interface Optional: 1 Channel 100K NTC or PT1000(TH0), 1 Channel PT100/PT1000
• USB Communication Interface: USB-Type-C
• DC 5V Maximum Output Current: 1A

Documentation

https://github.com/bigtreetech/EBB

Change from V.1.1 to V1.2 - HE0 (nozzle heater) is changed from PA2 to PB13