The Spider V3.0 board is a full-featured and excellent controller board, with space for EIGHT TMC stepper drivers, the ability to connect a Raspberry Pi directly to the board either through USB or through UART. Recommended for Voron 3D Printers and others. This board has add-on options, please review prior to purchase. Please see note at end of description for important information about this board! 2. Features¶ Compact size: 155.3mm x 76.5mm Based on STM32F446 180Mhz,all IOs can withstand 5V voltage 8 TMC stepper drivers support, with Uart&SPI support V2.2:Add Two 60V-Max stepper driver slot Improved TMC jumper settings again,simpler and easier V1.0&V1.1: 28V input max,12V@5A DC-DC,5V@8A DC-DC (Especially for Raspberry Pi),[email protected] LDO V2.2: 28V input max,12V@3A DC-DC,5V@5A DC-DC for Raspberry,5V@3A DC-DC for mcu and RGB, Two [email protected] LDO for MCU and motors Two car fuses for hot bed input and main power input Limit switch socket 24V/5V/3.3V optional, ready for more other equipment, such as -inductive sensor, BL-Touch XH2.54 connectors 10x PWM capable power mosfet outputs (1 for HotBed, 3 for Heat-End, 3 for fans, 3 for RGB LED strip) V1.0&V1.1: 3pin temperature header, you can use thermistor or thermocouple (requires AD597 module) V2.2: Up to 6 temperature sensors support Up to 8 ways PWM fans (only use 1 extrueder and no 12V/24V RGB used ),2 ways RGB led(12V & 24V optional) ,1 way 5V-RGB led (NEO-PIXEL/WS2812) RepRapDiscount SmartController compatible pin header on board UART1-Raspberry Pi pin header (including 5V@8A power supply) 2X4 PinHeader Out for SD Card moudle Onboard micro-SD card Type-C and Type-B USB connector optional EXP1 & EXP2 have more multiplexing functions, such as USART, I2C, CAN SD card & USB upload support A 4.7kOhm 0.1% temperature sensor pull up resistor is used, PT1000 can be connected directly. For PT100, an amplifier board must be used. V2.2: Add more protection (TVS for each motor divers, current limit resistor, VMOT fuse) For V2.1/2.2