Journal

THE JOURNAL

Field notes on making things follow.

Deep, build-in-public writing on UWB positioning, pursuit control, and outdoor obstacle avoidance — the engineering behind a wagon that trails you.

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UWB Tech

How UWB makes a wagon follow you

Why centimeter-accurate ultra-wideband ranging beats Bluetooth and cameras for a follower that actually keeps its distance outdoors.

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Follow DIY

Building a person-following robot: the follow-me math

The spring-damper pursuit loop behind smooth trailing. Target position, follow distance, and why a little lag is the whole point.

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Obstacle Avoidance

Lidar obstacle avoidance for outdoor followers

A small lidar plus a reactive avoidance layer keeps a follower on your tail without tripping over curbs, dogs, or golf bags.

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Follow DIY

How to build a person-following golf cart

Everything you need to turn a push trolley into something that trails you down the fairway on its own. The frame, the sensors, the motors, the software, and what trips you up along the way.

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UWB Tech

Why your follower keeps losing you: body blocking

Why a shoulder can break UWB tracking, why reflections make it worse, and what actually helps in the field.

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UWB Tech

UWB vs Bluetooth vs GPS: which follows better

GPS, BLE, UWB. We tested all three for auto-following and picked one. This is what each can actually do, where it breaks, and why.

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