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Wayne, they're nominally 17mm in diameter, have a negative ring and a positive contact on one side with the circuitry on the other. Height is not critical up to about 5 or 6mm. Typical batteries could be anything from a single CR123a (3V) to three 18650s (12.6V fresh off the charger). Most buck drivers support down to about 3.3V, leaving out the CR123a primary users. Your GD series boards would be perfect if they were 17mm in diameter for those folks who want to run a single 18650 or CR123a primary.P60 driver. Can you be a little more specific?
What is the dimensional requirements? A P60 is what battery configurations?
Wayne
I would like to purchase high CRI emitters above 90 CRI and around 5000K CCT. Namely xp-g, and nichia 119
at about the possibility of a brass ring to adapt the 14mm drivers to a 17mm space? I was thinking of doing this for the drop-in that I'm going to be making for my G2.
The challenge with a brass ring is that several components on the 14mm drivers like the BBNG, GD, and SOB are very close to the board edge or right on the edge. Instead of going with a workaround solution that risks shorting out the driver, I'd prefer a ground-up solution based on a new 17mm diam design. I know you can move some components slightly in-board, which I've done with the inductor on the SOB for example, but there are still other components close to the edge.
Plus, thermal management is that much more challenging with the smaller 14mm boards. It can be tough enough with the bigger Sharks and Blue Sharks.