A self-oscillating full-bridge driver. It switches itself between manual frequency tuning (a front-panel pot) and feedback-driven self-oscillation once loop gain clears roughly 1. An LM311 comparator and flip-flop latching logic decide which, feeding a UCC27423 gate driver and GDT. Laid out as a 6-layer board with a dedicated ground plane. Posted 27 Sep 2026, four days before our last check, and still at the design-review stage. davekni, an established voice in the same forum, flagged possible OCD signal-naming reversals and UVLO polarity issues and suggested simulating before building. No board exists yet to photograph.
Schematics and photos
schematic: driver v2 (EasyEDA, v1.0) 
PCB 3D render, top (posted with the design package)
Sources
This is the card from the driver tree, written from what the builder published. Send corrections through the forum.