AnasSarkiz/NEMA14_RP2040

A NEMA stepper motor assembly concept with a controller board, proposed M3 screws and spacers, four motor leads with insulated splices, and a JST 4-pin connector harness.

Version
1.12.2
License
ISC
Stars
0

src/schematic-notes.json

[
  [
    "U_MCU - RP2040",
    "USB computer control; generates STEP/DIR.\nFirmware must check PD before motor enable.\nInternal regulator supplies the 1.1 V core."
  ],
  [
    "U_FLASH - GD25Q16EEIGR",
    "2 MB external QSPI flash stores firmware.\nRequired because RP2040 has no internal flash.\nBOOT pads permit ROM USB boot recovery."
  ],
  [
    "Y_MCU - ABM8-272-T3",
    "12 MHz crystal is the USB clock reference.\nLoad capacitors and XOUT resistor support\noscillation and limit crystal drive."
  ],
  [
    "U_PD - CH224K",
    "USB-C PD sink requests a 15 V motor supply.\nPG reports a completed power negotiation."
  ],
  [
    "U_BUCK - AP63203WU-7",
    "Efficient 3.3 V supply for MCU and logic.\nDiode OR accepts USB data power or PD.\nInductor and capacitors smooth switching."
  ],
  [
    "U_DRV - A4988",
    "Two current-regulated bridges drive the coils.\nSTEP/DIR interface; fixed 1/16 microstepping.\nNominal phase-current limit is 0.351 A."
  ],
  [
    "U_ESD - USBLC6-2SC6",
    "Clamps ESD on USB D+ and D- at the data port.\nVBUS pin references the protection diodes."
  ],
  [
    "U_TEMP / BZ1 / D_STATUS / D_PWR",
    "TMP102: I2C temperature, address 0x48.\nPWM magnetic buzzer and RGB status need firmware.\nPower LED indicates 3.3 V; RGB uses USB 5 V."
  ]
]