Wow I missed this! This is incredible! Clemence will you do another mod project using the B35AM like you did with the Armytek Tiara/Wizards or Skilhunt H04RC? Olights would be cool given their super high efficiency drivers.
The B35Ax, or NV4WB35Ax, is an led I really like for flashlights. High CRI :-) and throwy. Most of you know it as B35AM (NV4WB35AM) which is a 2S2P or “6V” emitter. It is also manufactured in 4S1P or “12V” versions, codename NV4WB34AR or B35AR, of which Clemence has plenty in his store.
Problem is that Simon only chose to buy a reel of 4500K emitters, which is too “cool” for my liking. But if we go to Clemence's store, we can only get “12V” emitters, which we cannot drive with Simon's 3A “XHP50 or 6V” boost driver.
So, could we convince Clemence to at least get some “warm” B35AM (6V) emitters? sm273, sm303, sm353… O:)
He’ll receive 100pcs sm273 B35AM March 28, send him an email to join the next group shipping to EU. For other CCTs you can tell him how much you want and depending on the demand he might order them with his next Nichia order.
Edit : you can also go with B35AR and the FC40 driver with a modified sense resistor to reduce the current to 1.5A.
This applies to any 4S or “12V” driver. It only is necessary to properly calculate the driver sense voltage at its maximum output current given the stock sense resistor value (V = I × R), and then work out the new sense resistor value for a B35AR.
I really wonder why Simon decided to have two drivers with so small current output difference. It must be because of ignorance in these matters (XHP35 emitters peak at ≈2.75A anyway). A proper driver for the FC40 would only make sense with a lot more current output, which the driver being sold doesn't has. I guess he was probably scared because of tail switch integrity…
Btw, that group buy. I see there’s also one for Nichia 519a. Is it the same one? Interested in buying both LEDs and mcpcbs for the B35Ax. Would be great if this is all the same group buy. Also any information on who forwards the individual items after the bulk order arrives in the EU?
Because shipping and customs fees are very expensive (only EMS/DHL since covid) to EU we did group shippings, contact him via his email on his website : https://www.eurekatronix.com/ (”contact” us email link).
But I think he said he might stop doing it after the last one, and have somebody have some stock directly in EU, more convenient for customers but item prices will be higher, I don’t know if this is still planned.