How you drive a Nichia GS (70ma, 5mm) LED?

9 posts / 0 new
Last post
rngwn
rngwn's picture
Offline
Last seen: 20 hours 15 min ago
Joined: 05/17/2018 - 03:44
Posts: 44
Location: Southeast Asia
How you drive a Nichia GS (70ma, 5mm) LED?

I have a bunch of Nichia GS’s lying around for quite a few years and still figuring out the best way to drive these LEDs in a flashlight.

I’d prefer to drive a single one these with 1xAA battery, but still can’t find a good circuit for that.

Any recommendations?

rngwn
rngwn's picture
Offline
Last seen: 20 hours 15 min ago
Joined: 05/17/2018 - 03:44
Posts: 44
Location: Southeast Asia

Has anyone gotten a view of the driver inside the Fenix E01?

This (discontinued) model was using the Nichia GS.

contactcr
Offline
Last seen: 7 hours 20 min ago
Joined: 05/19/2017 - 18:52
Posts: 1697
Location: US

Probably the best way is like this:

But i guess this is a good way too:

Lightbringer
Lightbringer's picture
Offline
Last seen: 4 hours 29 min ago
Joined: 08/30/2016 - 14:12
Posts: 8036
Location: nyc

3.2V LFP AA, resistor to taste (if needed).

Can’t get any simpler.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

Lightbringer
Lightbringer's picture
Offline
Last seen: 4 hours 29 min ago
Joined: 08/30/2016 - 14:12
Posts: 8036
Location: nyc

Or… get a cheep “showerhead” flashlight (crappy 3×AAA, usually), repopulate existing LEDs with the GSes.

Doubt they’d look any better, as the GSes were rather Angry Blue™, no?

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

rngwn
rngwn's picture
Offline
Last seen: 20 hours 15 min ago
Joined: 05/17/2018 - 03:44
Posts: 44
Location: Southeast Asia

Now speaking of the GS, I am getting a sample of the Chinese GS clones with 5600k and 3200k CCT (and 60ma max. drive current).

The manufacturer also claimed 90+ CRI with those. I will send some to Maukka to prove that.

The tint should be nicer than Nichia’s if these would be anywhere close to the rated specs.

I should be getting those by next week.

contactcr
Offline
Last seen: 7 hours 20 min ago
Joined: 05/19/2017 - 18:52
Posts: 1697
Location: US

rngwn wrote:
Now speaking of the GS, I am getting a sample of the Chinese GS clones with 5600k and 3200k CCT.

The manufacturer also claimed 90+ CRI with those. I will send some to Maukka to prove the claim.

I should be getting those by next week.

I think a lot of people jumped on Yuji’s at some point over the years. Not sure how many more people have a use for these. They were like 95 CRI in the same tints.

Most recent example: https://www.aliexpress.com/item/Sofirn-C01-BLF-Special-Mini-LED-Flashlig...

rngwn
rngwn's picture
Offline
Last seen: 20 hours 15 min ago
Joined: 05/17/2018 - 03:44
Posts: 44
Location: Southeast Asia

True, but these parts can only handle 20ma max. wouldn’t it?

I think the parts I will be getting (which can be driven at 60ma w/ 90+ CRI) is a combination (or at least a compromise) of both.

contactcr
Offline
Last seen: 7 hours 20 min ago
Joined: 05/19/2017 - 18:52
Posts: 1697
Location: US

They can be overdriven 2 or 3x that technically just not sure of life span