Hey guys,
I’m building a custom power and control board for a professional cinema LED video light. I wanted to throw it up here to see if there’s anything blatantly wrong before they actually pour the copper. I'm hoping this is as plug-and-play as possible (minus flashing the STM32, obviously).
Quick rundown of the board:
- Brains: STM32F1 microcontroller
- Wireless: PB-03M Bluetooth module
- Power: IP2368 handling 100W bidirectional USB-C PD to charge a 4S LiPo.
- Diffusion: A 4-MOSFET H-Bridge driving a 50V AC square wave for a PDLC diffusion film.
Main things I’m sweating over right now:
- Grounding: I tried setting up a star ground using a net tie to keep the noisy IP2368 ground away from the STM logic until they meet at the battery connector. Did I actually execute that right?
- The H-Bridge: I tried replicating a board that came with a PDLC Film controller, and i've never done anything like this before. As far as I know, it just takes 5V from the boost converter and steps it up to 50VDC, then it chops it into 50VAC feeding that to the PDLC film by cross toggling the transistors really really fast. But! No idea if thats gonna work!
- General idiot checks: Missing pull-ups, floating pins, or weird layout choices I'm blind to.
I’ve attached the full schematics, the 2D copper layers, and the 3D render the factory just sent me.
Tear it apart I'd much rather get roasted now than deal with a board fire later. Thanks!
u/JBriefcase — 22 days ago
