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Show HN: A stealth ESP32 radar hidden in a phone charger (juanfr.gumroad.com)

4 points by jfranchino ↗ HN
This is a short technical article documenting a personal project.

The goal was to hide a radar-based presence detection system inside an ordinary phone charger.

The focus is not on firmware features, but on design decisions: - physical constraints - radar orientation - electrical isolation - simplicity over configurability

It’s not a tutorial and not a product announcement. Just a record of engineering decisions made under real-world constraints.

Feedback is welcome.

2 comments

[ 2.8 ms ] story [ 14.7 ms ] thread
tfwnopmt
Why is electrical isolation even a concern? There are no user accessible conductive parts.
theamk
FYI Show HN rules [0] requires "something you've made that other people can play with".. and explicitly says:

> Off topic: blog posts, sign-up pages, newsletters, lists, and other reading material. Those can't be tried out, so can't be Show HNs. Make a regular submission instead.

(Also, putting email collection form in front of teaser for your book is a strange decision.. I am not going to sign up for your mailing list just to see what the book might be about, especially since "(ESP-01 vs ESP32-C3)" part suggests the designs described are not particularly complex)

[0] https://news.ycombinator.com/showhn.html