Recommend a driver board for tower module n' Seoul.

[KDOG3]

I will be ordering the AW tower module kit (Seoul P4 USWOH) for a "classified" project of mine. It takes a .55" driver board and I'm looking for one. I would like one that has a Hi-lo feature if possible. If not I guess I can drop my 60 ohm McE2S in there. I can't decide if I want to go with 750 or 900mah. I looked at the Downboy 917 at the shoppe but the description says it only has a 750 output voltage. Is that a misprint? I need one with 3.7v-12v-ish input voltage and a nice flat output curve. But I really don't know the difference between the Badboys, Downboys, nexgens... etc. I will be using 2-3 primaries or 2 AW 3.7v 17500's or 17670s with it. I'm kinda thinking of going for insane output with this project with the capability of a low output. Do you think 750 would be enough or should I just go for gold?

 

[KDOG3]

Anyone?

 

[KDOG3]

Ok, quick question about the Downboy 1000. How long to you think it will run off 2x17500s' on high? I'm assuming the Seoul can handle an amp here.

 

[KDOG3]

Wow, nothing but the sound of crickets chirping in here...

 

[Aepoc]

I am waiting for a response as well. I have an AW tower and a seoul p4 and wish to run it with a single 18650. Not sure what to use as circuitry. I'm looking for about 900ma.

 

[Nitroz]

I am waiting for a response as well. I have an AW tower and a seoul p4 and wish to run it with a single 18650. Not sure what to use as circuitry. I'm looking for about 900ma.

Since you're running from 1 cell, the Flupic is a nice match for your application.

I have a p4 with a cutdown Mag running from 1, 18650 and a flupic.

 

[Aepoc]

Do you think the interface of a FluPIC would be difficult to navigate through with a SureFire style tailcap? My friend has a FluPIC in an ultrafire mod and it works well with the inverse click style tailcap. What are your thoughts?

 

[gadget_lover]

The P4 should be able to handle 1 amp IF you have sufficient heat dissipation.

The downboy will adjust the voltage to force the LED to consume the desired amps. The downboy is rated for 3 to 16 volts, so it will handle a pair of li-ions with no problems. As long as the voltage supply is higher than wwhat is needed by the LED, it will be regulated. When the voltage supply falls below what is needed to keep the LED at it's target current, the downboy will go into direct drive mode.

Sounds like it's what you want.

Watch out about 2 Li-ions, since the downboy will allow the batteries to go below 3 volts. I don't know off the top of my head where the cutoff shoudl be to prevent damaging the batteries.

Daniel

 

[KDOG3]

Hmmm. THanks for the tips. The ones' I'm looking at right now are the DB1000, DB 917 and DB 750. I will only use protected cells with it so it shouldn't kill the cells. The light I'm planning on using it in is all aluminum and has a pretty large head area. I just gotta decide on output/runtime.

But the description of the DB917 at the shoppe has the output at 750mah, which doesn't sound right. Whats' the deal with that?

 

[JohnF]

Link to info on downboy boards, please?

 

[c0t0d0s0]

Probably just a generic description. Downboy can definitely go up to 1A. You can also order a custom downboy by ordering a blank board and 2 resistors + solder on option. Use the resistor calculator to find out which resistors correspond to the desired current.

I'd guess 2x17500 would provide around 2 hours of regulated runtime with a DB750, or about 1h30m with a DB1000... Your call

 

[KDOG3]

John F: heres' the page from the shoppe that has the boards on it.

Downboy boards etc.

Hmm maybe I can build a DownBoy 850...

 

[c0t0d0s0]

Link to info on downboy boards, please?

http://theledguy.chainreactionweb.com/product_info.php?cPath=48_49_61&products_id=185

 

[KDOG3]

Oh sweet, I didn't realize they could build it for you. When I try to build a 850 it gives me a 833. Thats seems like a good solution. C'mon payday!

Hmm but with that effieciency level, how much current do you think will be hitting the emitter?

 

[c0t0d0s0]

It will be 833 mA or something very close to that The current numbers in the model name refer to the emitter current, not to the battery draw.

 

[KDOG3]

Sweet! That seems like a good compromise between 750 and the 917/1000. I wonder what the draw on the batteries would be?

 

[c0t0d0s0]

Now that really depends on the vf of the emitter at a given current and the efficiency of the converter... let's say, 3.6V@833mA = 3W of power. Assuming converter efficiency of 80%, the board should consume 3.75W from battery... at 7.2V (2 li-ion cells) that would mean 0.52A of current draw... Something like that.

 

[wquiles]

I built my own Turbo LED Module with a Seoul P4 U bin and I used a Downboy 1000mA, but a 750mA or 833mA will probably be just as bright while consuming less power and lasting longer

Will

 

[KDOG3]

Nice! Can't wait for my set up to get here. I may end up just getting a 750 but we'll see...

 

[Aepoc]

I have decided to use a wizard 2 and a single 18650 for my tower mod. The wizard 2 is a buck and boost circuit so my Seoul will have completely regulated output. I too can't wait for my orders to arrive.