painter-hat

A stepper motor hat that sucks less.

Caution

I haven't gotten the possibility to actually manufacture this yet. Therefore it might not work

Features:

• dual stepper-motor driver control
  
• 100W USB-C PD to power motors and raspberry pi
  
• support for A4988, TMC2208, TMC2209, etc. driver modules including UART control
  
• meant as a replacement for Waveshare Stepper Motor HAT^*
  
  
  

Improvements in v3:

• full JTAG and SWD using a TAG-Connect TC2050 debug connector
• better power managment circuitry

^*not completely hot-swap. you will have to use a different firmware

Motivation

I was very frustrated working with the Waveshare Stepper Motor HAT. The quality control seems to be off as two HATs I ordered didn't work. Their documentation is good and the provided codes works but there are some minor issues that led me to write my own code to control the hat. Most importantly you can't swap drivers (in case you fry them for example) which led me to buy multiple new drivers after testing and subsequently frying the drivers. This sucks because for my use case I have to get a whole new HAT even when one of the two drivers is still working.

Schematic

Note

The images may not always be the most up-to-date. I suggest viewing the PDF.

PCB

Top Layer - Signal

1st Internal Layer - Ground

2nd Internal Layer - Power

Bottom Layer - Signal with GND Copper Fill

DIY it

You should be able to PCBA it.

Firmware

Note

Currently outdated!