Advanced speed control for grinder's AC brushed motor. With RPM stabilization via Back EMF.
Video:
Schematic/PCB:
- EasyEda project page - you can order PCB & all components there in couple of clicks!
Note! Due size restrictions, it's impossible to create universal PCB for all
kinds of grinders. We prepared PCB for Hilda 180W - it's very popular and
cheap. Boards for other models are left to volunteers.
Everything is done in PlatformIO. If you wish to update yaml config and
regenerate headers, you may need node.js and run npm run config.
Note, this PCB has no AC isolation! That's ok for normal operation, but if you plan to debug firmware via USB, you MUST use USB isolator module.