Improved Fenix L1P and L2P 3-stage with separate on/off switch

Here's the photo of the proto for the L1P and L2P 3-stage circuit:


The circuit will NOT use drop resistors to reduce the output. This design uses the leaf spring switches to actually change the level of current going to the Lux by modifying the feedback to the controller. This method is very efficient for all levels. This means the runtime for lower levels will be about double compared to using drop resistors to drop the switcher out of regulation.

Is it on his site already? I couldn't find it. Or is it available directly from you?

Sweet



Let me know when to PP



Benny

Hey MM,

Will this tailcap switch work with the CR123/CR2 useing both 3v primary and 3.7v LiIon ???

frisco

How does this switch work? Twist a little for low and twist some more for high? Or is it on-low -> off -> on-high -> off...?

frisco said:

Hey MM,

Will this tailcap switch work with the CR123/CR2 useing both 3v primary and 3.7v LiIon ???

frisco

Click to expand...

It will work with primaries best. Li-ion can work if the circuit is set-up to handle it, but the stages won't be very distinct until the voltage drops below Vf of the Lux.

Shaocaholica said:

How does this switch work? Twist a little for low and twist some more for high? Or is it on-low -> off -> on-high -> off...?

Click to expand...

Twist for low-med-high and click for on/off.

Nell said:

Is it on his site already? I couldn't find it. Or is it available directly from you?

Click to expand...

I haven't ordered the boards yet. This is still in the development stages.

Will this be something I can do myself on my existing L2P? Or will it only be avail as a whole light? What do you expect the cost to be? What will the mod require?Im interested! Ive got a RR headlight on the way and was going use its switch,but maybe Ill wait.I like the on off independent of the levels.Great idea.

for me.... a person who doesn't own a fenix...

would it matter if i buy a L1P or a L2P (don't consider the tube)... i'm assuming that the circuit can run off of 3.6~4.2v's? Thanks

Paul6ppca said:

Will this be something I can do myself on my existing L2P? Or will it only be avail as a whole light? What do you expect the cost to be? What will the mod require?Im interested! Ive got a RR headlight on the way and was going use its switch,but maybe Ill wait.I like the on off independent of the levels.Great idea.

Click to expand...

I may sell the driver alone. The driver would cost $30.

I'm interested.

in!

MillerMods said:

I may sell the driver alone. The driver would cost $30.

Click to expand...

Miller,

the driver alone, includes also the 2 stage leaf spring switches?

Thanks.

jar3ds said:

for me.... a person who doesn't own a fenix...

would it matter if i buy a L1P or a L2P (don't consider the tube)... i'm assuming that the circuit can run off of 3.6~4.2v's? Thanks

Click to expand...

The max Vin of the driver is Vf (~3.2V in).

Exactly what my L2P needs!:goodjob:

ANY news on this????

Yes, but it doesn't work for the L2P so far. Low and medium levels work fine with up to 4.2 volts in (with a Li-ion cell it draw 650mA and it's output is around 600mA), but the high level saturates and burns up the Lux with anything higher than 2 volts input that can supply 6 amps of current. With a NIMH the current draw is 1.5 amps on high for an output of 1.5 watts. Low draws 120mA and drives 40mA and medium draws 600mA and drives 220mA. I can change the these drive levels to pretty much anything but these are my prototype settings.

I may be able to get it to work with the L2P body or 3V lithium for all levels as well but I have to do some further investigation.

I too am interested in this 3-stage mod. Any estimate on when it will be ready for release?

How will the brightness of each level compare to a stock L1P (on 1xAA) and stock L2P (on 2xAA, assuming you can get it work in this configuration)?

Any chance of selling this in the form of a complete light, but using a Lux III (ala L1T/L2T)?

Hi,

i am also interested in such a smart little light.
last week i ordert the last cr123 body from 4sevens but the MM L2P was on backorder.
when i place an order now at the fenix-store, will the MM L2P be this one with 3 stage?
i want to use it with protected (1)14500er, (1)cr123 and (2)nimh. would the board take all of them?(oh i missed your post above)

do you use the stock Lux1 or is an SXOH possible?

cacer