@ffjon posted:
...His "design" uses just capacitor and voltage regulator. I'd appreciate any thoughts on this approach.
By my reckoning, your linked youtube video shows "just" a capacitor and a bridge-rectifier (not a voltage regulator).
To each his own but I think the photo (clipped from your video link) is RIDiCULOUSLY bright! GRJ's module allows brightness control...amongst many other benefits.
Full disclosure, I have absolutely no business relationship to GRJ's goings ons and arguably we disagree here on OGR more than we agree! Also, you get support from fellow OGR participants with his module which is absolutely priceless IMHO.