It’s great that you made a new driver for the Emisar D4Sv2 with dual channel support :+1: This flashlight has great thermal capabilities. With a new driver it will keep the brightness high wonderfully
I have a few friends willing to purchase a few units.
I am interested in the “channel ramping” version with diodes:
On the first channel: 2 XP-L HI 4000K LEDs powered by 9A CC.
On the second channel: 2 Nichia 219B 2700K diodes powered by 5A CC.
These diodes require different currents. Can you prepare such a version?
In a situation where the brightness is set to maximum and the Tint-Ramp is set in the middle (so that 4 diodes are lit) then what current will go to the diodes?
9A/4 diodes=2,25A or 5A/4=1,25A?
I am still interested in the second version of the Emisar D4Sv2 flashlight with four Osram W1 diodes. I would buy a few of such flashlights if you would make for it a single channel driver with full stabilization like KR4 flashlight has (9A Constant Current + Direct Drive). Are you able to prepare such a driver for D4Sv2?
D4Sv2 with 4 Osram W1 diodes is offered with obsolete driver (FET+ 3). I think a lot of people would like to buy a D4Sv2 flashlight with Osram W1, W2 or XPL HI diodes if it had a driver with KR4 (9A CC + DD), because KR4 driver gives very good stabilization.
I own all models of your Emisar/Noctigon flashlights :sunglasses: I hope to enlarge my collection :innocent: Thank you for making such cool flashlights
Hank, does 2x SST20-DR and 2x 219B-V1 3500K work together both in KR4 and D4SV2? If so, what driver will you be using? 5A noFET or 9A noFET? Are LEDs aligned in diagonally crossed pattern or two colors side by side?
Yes, this combination works for both KR4 and D4S V2.
There are dozons of different combinations.
We choose the suitable current for each combination.
For example, if you choose 219B on both channels, we will use 5A for each channels.
If you choose 219B on one channel, and W1 LED on the other channel, we will use 5A for 219B, and 9A for W1 LED channel.
If you have your preference, just drop us an email, we will customs make it for you.
Thank you Hank. That is very helpful information. I am just waiting for DM11 to become available before I make my next order for at least two more flashlights. :)
Hank, I’m wondering about ordering a D4SV2 with the new constant current driver but with 4 identical emitters (no tint ramping). In this configuration, will the maximum output be lower than the standard D4SV2 with the same emitters?
Hank can you use a 7.5A noFET driver to power the 219BT-V1 diodes in the D4S V2 flashlight?
The question is about the D4S V2 in the two channel “channel ramping” version (2× 219B 2700K 7.5A and 2x XP-L HI 4000K 9A).
5A for two 219B diodes is a very delicate current. I would prefer 7.5A.
7.5A / 2 = 3.75A per diode
One 219BT-V1 diode can operate stably up to 4A. http://i.imgur.com/bkodESs.jpg
Another question is about the flashlight in a different configuration:
More and more people want to buy an Emisar D4Sv2 flashlight with four Osram W1 LEDs with a single channel driver with full stabilization and with an unlocked FET for Turbo as it is in the KR4 flashlight (9A Constant Current + Direct Drive). Hank are you able to prepare such a driver for D4S V2?
I see that user “CollectEverything” is also asking for the same configuration.
The D4SV2 with 4 Osram W1 LEDs is offered with an outdated driver (FET+ 3). I think many people would gladly buy a D4Sv2 flashlight with 4 Osram W1, W2 or XPL HI diodes if it had a driver like the KR4 has (9A CC + DD), because such a driver would give very good high brightness stabilization.