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Issue 01October 2026

WiFi that senses, a wand that sleeps

Three little ESP32 boards that learn how you move from WiFi alone. A wand whose battery math works out to about 1.8 years. A fountain pen you can print. Plus the battery math behind a 25 µA standby, and a radar chip with its antennas built in.

In this bin: Opener / Builds / Shop Class / Datasheet Decoder / Bench
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