So i’ve decided to enter this, for SAG. I can already see from the other contestants, that I’m way out of league.
This is gonna have a ghetto hack feel to it
I’m building a huge lantern out of a matte plastic storage container (will include pic later)
Features so far:
Powered by 9 x 18650
Dual LED, 2700K + 6000K 5200K
Active unnecessary cooling
3A charge circuit
Battery charge status LED
Q8 driver with Andruil
Todo:
USB port, so it can function as a power bank
Mechanism to change between each LED or have them both on (FOR MAXIMUM CRI )
All the rest; switches, on/off etc.
After two hours, here’s the progress so far:
Boost driver to power the fan @5V
Specs:
LED1: XP-G3 R4 8A3 2700K
LED2: XM-L2 T6-3B 5200K
Driver: BLF Q8 with Andruil
Cells: 9 x 18650 (LG S3 2200mAh)
2018-09-26 Edit: Added specs
2018-12-01 Edit: Failed to complete build
Update: So I failed to complete the build, due to life. 40+ hour work weeks and prioritising my family left little to no time to this.
I will finish this eventually. Perhaps in a little different setup. I think an other driver is needed. Non FET ragulated e-switch driver thats built for just 1 emitter. Given my 9 x 18650 cell setup It’s 9 old used low discharge cells, but combined they will still be able to deliver 18A. A but much for 1-2 emitters in direct drive.
Thought about that yeah.
The cells that are going to power it, are salvaged 18650’s. They are used, and had 2200mAh when they were new. Now they can hold around 2000mAh.
I have no idea what chemistry they are, other than they are very low discharge. Also, all the wiring will add some resistance before the juice hits the LED.
But time will tell
That’s the idea yea. It’s not a “lantern” as in to light up an area. But a box that gives off a soft ambient light. That’s also the reasoning behind the dual LED’s.
So I can choose warm yellow or more white light :sunglasses:
Yeah, me too! It makes me think of those balloon lights I’ve seen used for night-time road work in recent years. Those are VERY bright so they light up a huge working area, but produce almost no glare!
FWIW, the ‘lantern’ branch of Anduril supports tint mixing. You’d have to modify the driver though, or use a different one, to drive the LEDs independently and get equal amounts of power on both channels.
:+1:
