2025-08-17

No, it is not worth the effort trying to assemble these by hand (>_<) At least not without a stencil and a heating plate or oven.

That aside, having replaced the soldering iron tip, the toolset now works like a charm. A rusty tip should retire! Pushing it to the limits by a hot core might strain the rest of the parts.

In the last run, the speaker was just loud enough with a full-range signal; it needed a higher gain. The speakers sounded well after the audio filter was revised to bear a gain of 1 (rather than the previous 0.22).

Getting the onset detection right with only acceleration readings does not appear to be a simple task. Further analysis is needed; do we need to turn to Kalman filters again?