Build log
What we measured, what we shipped.
Posts go to the mailing list the same day. Numbers over adjectives.
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Rev B boards are shipping
The pilot run is counted into stock, the store is open for Canada and the United States, and the Tindie listing is live beside it.
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The characterization report
The measured numbers from bring-up and test, which are the ones the spec sheets now carry: efficiency, idle current, gauge accuracy, BMS trips and thermals.
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Primary cells and the passivation dip
Snowbird runs a lithium thionyl chloride cell in primary mode, with three independent blocks keeping charge current away from it, and a depassivation step so a shelf-aged cell reads full on day one.
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Why the Feather handoff is on 3V
Every Feather host already has a charger, so a power module under it has to decide which of the host's pins it touches. We touch 3V and EN, and nothing else.
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