To check the diodes, put the multimeter in the diodes check mode
Diodes do not light, an audible signal is heard
The driver did not connect, I decided to start to ask
What’s what and why
Everything was done, as in this photo, there is no result. The diodes are dead. Do not understand why. Can the diodes partially break off during soldering and move away from the pads?
Yes, it’s possible if you solder them for to long with weak soldering iron. The heat will melt the entire solder on the MCPCB and possibly one or more LED shorted (if moved). Easy fix is to add flux in between the LED gaps and reflow the whole MCPCB on a hot plate. Remove all wires and test again. Don’t forget to clean it THOROUGHLY before testing.
Disconnect all the wires first. Then test each LED individually. It’s easier to only fix where the short occurs. It’s possible you heat it for too long and the solder bridged. If you can’t fix it, you can send it back to me or anyone else near your area who did the reflow of this LED before. E21A is indeed harder to solder than most LED.
I just received the 5 Tiara C1 Pros modded with 4x E21A from Virence.com and I am very happy with Clemence’s work! The packaging of my emitter/mcpcb order was phenomenal too! :+1:
I love the E21A tint especially the 2500k and 3000k version, which is perfect for bedside use. They are rosier tinted than the 3000k 9050 219B bedside EDC I’ve been using, which I already thought looks really nice. The 4000k is slightly rosier looking than my 9050 219Bs but not as rosy as the Cree 5D tints on the Emisar lights. However, it looks noticeably cooler than the Cree 5D tint. I think the 219B 9080 will be even better looking tint wise if you prefer rosier tint. I took lumen readings at 1sec (turn-on) using the TA Tube calibrated with Maukka calibration lights:
Tiara C1 Pro 4000k - 572 lumens
Tiara C1 Pro 3500k - 539 lumens
Tiara C1 Pro 3000k - 529 lumens
Tiara C1 Pro 2500k - 438 lumens
Tiara C1 Pro 2000k - 407 lumens
Lights were running with fully charged Aspire 18350 1100mah batteries. I doubt it matters what batteries I use though since the amps are pretty low. But the output is quite impressive given how small the Tiara is and how good the tint and CRI looks.
Could you test your VR21P4 loaded with Optisolis with Carclo 10623 or 10624 optics? I think, if the beam is properly even, that would be good for using them in a short (and wide head) 18350 flashlight. With 1.6-2 A (400-500 mA per LED), that would make a very usable 400+ lumens (500+ for 5000K and 6500K CCT).
Do I guess right, that the 4 different rotations of the emitter with the centered TIR over them should balance the beams produced by the off-center light emitting surface?
I have no Carclo 10623/10624 but frosting the 10622 with #320 grit SiC already fix the beam very well.
No, with only 4 LEDs, rotation will only make the beam’s hotspot weighted to one side. The LED’s die hot spot is too asymmetrical it requires at least 6 LED in rotation to get even beam pattern from a tight plain TIR optic. So far, the best fix is to use the tightest Carclo 10621 paired with Luminit’s 30° - 80° LSD.
If you refer to this, can you link retailers, where I can get it?
Another (non-flashlight) question. Did you consider getting an MCPCB manufactured for Optisolis, which has: 16 or 24 emitters, and can be configured into 4S4P (4S6P) or 8S2P (8S3P) for 12V or 24V voltage requirement. I think, if Optisolis is not the best for flashlight usage, it would be very tempting for ceiling light panels. If there would be such panel, I’d be a definite buyer for that (3-4 of these panels could nicely illuminate a bigger room).
Work in progress…. Seamless module you can combine it to make unlimited larger panel of light.
Yes, that’s the correct Luminit. Will put some in the store too. Try to contact Edward Udarbe in Luminit, he’s the marketing manager. But be prepare, it’s a very expensive, aerospace class diffuser. Luminit just launched the cheaper version for earth dweller like us.
It would be just perfect! Very good to get these good news! :+1: I just told my father about Optisolis, and this way of its possible usage about a week ago (and I told him, that I will contact you). You already read minds
Aw. So this would be good for occasional custom builds, but probably won’t be competitive for using in a manufactured flashlight.
Seamless module you can combine it to make unlimited larger panel of light.