We got the drop that Sonnet 4 (www.anthropic.com/news/claude-4) just got released and the baby went to sleep early, so let's try it out! We wrote a library for the STSPIN220 (www.digikey.com/en/products/detail/stmicroelectron…) — this is a stepper motor driver like the A4988 (www.adafruit.com/product/6109) or TMC2209 (www.adafruit.com/product/6121), but for low voltage motors.

One interesting thing about it is it uses the step/dir and two mode pins to set the micro-steps, from 1 to 1/256. Since that gets a little confusing, we figured a driver (github.com/adafruit/Adafruit_STSPIN) would be worth doing. The table was definitely annoying to decode, and higher microsteps started overflowing 16-bit variables, but now we've got it spinning happily!

#anthropic #claude #sonnet

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