The ATX mini form-factor Infinity pi3 CNC Motherboard specifications are as follows

  • Power supply input default Fuses sets total limit of the 12vDC single supply to 42A maximum, and demands minimally 5vDC SB 2.5A  (with fully populated input power sockets, both the 15A Fuses may be substituted with 30A for a total 72A maximum available output)
  • Six FQP65N06 n-Channel Mosfet outputs: 12vDC 10A per channel maximum
  • Eight A4988 NEMA17 bipolar 2-phase Stepper outputs: 12vDC 2A per phase (4A per motor)
  • Six analog temperature inputs (biased for 100k NTC thermistors)
  • Six home switch inputs (5v)
  • One probe switch input (5v)
  • One JTAG over SPI port (3.3v)
  • One I2C port (3.3v)
  • One I2C port (5v)
  • Two UART ports (5v)
  • Two RPM/PPS sensors (5v)
  • Two PPS hobby ESC outputs (5v)
  • Two PPS hobby servo outputs (5v)
  • Four FAN sockets (12v)
  • Two FAN sockets (5v)
  • Thirteen labeled switch GPIO (5v)
  • Fourteen unused GPIO (3.3v)
  • One always-on CPU FAN socket (5v)
  • One Atmega2560 Arduino socket
  • One Raspberry Pi3B+ socket