DRV8833 Motor Module: Coast, Brake and Current Regulation Are Different

This is an unbuilt educational design candidate.

Complete MicroPython hardware demo and shared pure control policy. Host unit tests exercise policy, limits, faults and timing; no target build or motor run.

On a computer: python3 test_drv8833_control.py
For the calculator, run python3 drv8833_control.py
For the motor only, review the full bench procedure before copying the file to a Pico running MicroPython; main defaults to forward/coast.

The SVG is editable vector source; PNG is its raster rendering. The circuit contract contains exact physical pin and pad requirements. Observations CSV is deliberately blank. Native EasyEDA/OSHWLab project identity, ERC/DRC, assembly, thermal qualification and physical results require separate evidence; this ZIP proves none of them. Do not order a board from this author package.
