*BLF LT1 Lantern Project) (updated Nov,17,2020)

Looks like the surgery didn’t slow you down? Very impressive. Thanks for your all your efforts!

Nice! Thanks Lexel!

WOW :+1: :beer:

Nice job, Lexel! Thanks!

If I could buy these guys a beer I would buy them a bar. Thank you all for making this come true!

Lexel, what is the lowest possible current with that FET driver?

its one Channel PWM and should not suffer from low PWM cycle like AMCs are so 0.4%

I am not sure which current we get with lowered MCU voltage
from 5V as DELs driver was designed, here we got 2.8V we should get about 60%

Not sure which current he calculated, need to be tested

Sign me up.

Do we have any price estimations?

mdeni added to interest list at 958, too lazy to add the next poster at 959 . . . :wink:

As far as price goes, nothing firm, IIRC maybe $30-$40, depending on the final feature set.

I think it well be more expensive than the Q8. The design is more complicated.

Interested in at least 2

@The_Driver, I do think it’s going to hit 40$.

Even though we are using a more complicated driver circuit and 8 LEDs, Samsung LH351Ds are much cheaper when bought in bulk than Cree LEDs, so that should balance out.

It also needs less thermal mass since it will absolutely never exceed 1000 lumens except if modded, so less metal is needed.

I do think it’s going to be 40$.

Two total, two more?

Are we set on the LEDs?

R9 values and BBL? Is the light going to be spectacular? :slight_smile:

Under 40$, or under 50$ shipped at least seems decent. I hope the interest will be a lot more if it is really that inexpensive.

Does this mean it will be constant current regulated? Is it a boost driver with two strings each with 4 LEDs? Is the intent to run the batteries 1S4P?

At that price point I think I would like to reserve an additional 2, putting me at 3 total.

@stereodude, it is actually going to be using a linear FET instead of 7135s.

This allows for no PWM, perfect constant current allowing for greater efficiency of the efficiency, and no parasitic inefficiencies coming from PWMing 7135s.

Fitting it under 40€ or 39,99€ with shipping, means no import taxes in many countries. That means the light is 39,99 to the door. A 41€ light with tax is more than 55€ to the door.

40€ = 46$

They should charge a few extra bugs.
I don’t want an manufacturer to make loss, like Lumintop on the first round of the GT.

For Germany it’s 26 Euro and a few cents to slip under taxation.

And if I must pay a tax, I am OK with that.