HID Host Conversion to MT-G2: Almost Done...Battery Carrier Installed, Light Tested. (post #46) beamshots

[wight]

@Ouchyfoot

I tested my driver and it is now installed in the light and wired to the MTG. Just have to complete the carrier and wait for my 18500s to arrive…cross your fingers it all works.

I’m using an HX1175B buck driver.

With two 18650 it drove an MT-G2 at 3.5A, and with three cells it drove the same emitter at 7A.

Why the difference in current readings? I’ve used LCK 5A buck drivers with MTG and two cells and got the full 5A. What is different about the HX1175B that it won’t produce 7A with two cells.

I’m not worried about it, I just want to know how it works.

I cross posted your question over here. In the meantime, can you measure LED vF while driving it on two cells? Ideally we’d also know the total loaded voltage of the two cells. I’m thinking that maybe this emitter has an exceptionally high vF or the cells are sagging exceptionally low. Vf + sense voltage (0.25v) must be > input voltage. If Vf + 0.25 = loaded battery voltage then there’s your culprit. Really it’s just something to check, I don’t know.