new P7 driver 3amps?

[DocD]

did any of the experts get a look at this http://www.kaidomain.com/WEBUI/ProductDetail.aspx?TranID=5296
is it realy 3 amps thanks DocD

 

[spencer]

Looks nice. I don't know what the bottom thing means about only putting out 1A.

 

[1 what]

I'm not an expert but I ordered 1 last night.....We'll see what it's up to when it gets delivered.

 

[darkzero]

http://www.cpfmarketplace.com/mp/showthread.php?t=180676

 

[spencer]

I think I'm going to order one. I'll let you know how it goes.

 

[climberkid]

wow i should probably get one of those for sure. but i will wait to see what you guys have to say about it.

 

[rizky_p]

Look nice on the spec but quite expensive for me...I'll wait for someone to test it out.

 

[James35]

Look nice on the spec but quite expensive for me...I'll wait for someone to test it out.

Really? $12 is expensive in comparison to the the rest of the light? In my opinion, ALL of these driver boards I've found are a steal! Even the best D2DIM is only $20.

Let's say you were going to make a Mag 3D P7 light:
$20 Mag 3D
$27 P7
$20 heat sink
$12 driver
$36 batteries
$15 MOP reflector
$6 lens
$5 charging jack
$2 thermal adhesive
$3 bicycle tubing
$5 wire
$20 shipping
Total = $171
This $12 driver is only 7% of the overall parts cost, not to mention your time in building it.

 

[marschw]

Well, it may not be a large percentage of the price of the project, but that's not an excuse for the seller to overprice it...

BTW, my Mag 6D P7 project was:

Mag 6D: $25 (Fry's B&M)
C-bin P7: $23 (DX SKU 12721)
Heat sink: $14 (DHS's)
Driver: $6.50 (KD SKU 4338)
Batteries: $59 (all-batteries.com SKU 835: 4x F-size 14Ah NiMH) :mecry:
Reflector: $5 (DX SKU 12229)

Things like wire and thermal grease and glue I had on hand, and shipping was free on everything. Total=$133... but I'm probably gonna buy the expensive driver anyway just to test it out. :twothumbs

 

[James35]

More power to you if you can make a driver for less than $12. I can't. Not worth my time. I'm very appreciative that we have such nice choices out there for such low cost.

 

[JustinS]

Really? $12 is expensive in comparison to the the rest of the light? In my opinion, ALL of these driver boards I've found are a steal! Even the best D2DIM is only $20.

Let's say you were going to make a Mag 3D P7 light:
$20 Mag 3D
$27 P7
$20 heat sink
$12 driver
$36 batteries
$15 MOP reflector
$6 lens
$5 charging jack
$2 thermal adhesive
$3 bicycle tubing
$5 wire
$20 shipping
Total = $171
This $12 driver is only 7% of the overall parts cost, not to mention your time in building it.

Can I ask what the bike tube is for, is it for going over the drivers??
Cheers
Justin

 

[rizky_p]

Well i just dont expect 12 dollar driver came from KD.

Really? $12 is expensive in comparison to the the rest of the light? In my opinion, ALL of these driver boards I've found are a steal! Even the best D2DIM is only $20.

Let's say you were going to make a Mag 3D P7 light:
$20 Mag 3D
$27 P7
$20 heat sink
$12 driver
$36 batteries
$15 MOP reflector
$6 lens
$5 charging jack
$2 thermal adhesive
$3 bicycle tubing
$5 wire
$20 shipping
Total = $171
This $12 driver is only 7% of the overall parts cost, not to mention your time in building it.

 

[James35]

Can I ask what the bike tube is for, is it for going over the drivers??
Cheers
Justin

It's for the outside of the light. This can be helpful for 3 things: extra grip, insulate your hands from the cold light in the winter time, and protect the charging jack from water.

 

[marschw]

I just noticed, the layout of the board looks similar, if not identical, to the unpopulated underside of the driver in the EYJ-XAQ5. It even has that odd little peg for a center contact.

 

[DocD]

Did any one get there hand on this diver? Yet and any of the spec's to see if there right?

 

[TorchBoy]

Re: New P7 driver 3 amps?

I don't know what the bottom thing means about only putting out 1A.

That appears to be the draw on the battery. The whole thing is messy and unclear, but I'm particularly disappointed the spec writer can't make up his mind whether it's 3.0 amps or 2.8 amps.

 

[darkzero]

Re: New P7 driver 3 amps?

That appears to be the draw on the battery. The whole thing is messy and unclear, but I'm particularly disappointed the spec writer can't make up his mind whether it's 3.0 amps or 2.8 amps.

Huh, that can't be right if it output is near 3A? :thinking:

 

[Beer]

It's for the outside of the light. This can be helpful for 3 things: extra grip, insulate your hands from the cold light in the winter time, and protect the charging jack from water.

Tell me of this "charging jack" you speak of!?!? I posted a "wanted" thread in the custom B/S/T forum about a jack to charge cells in a mag and got nothin.

Better yet just PM me so I don't hijack this thread. THANKS!!

:tinfoil:

 

[baterija]

Re: New P7 driver 3 amps?

Huh, that can't be right if it output is near 3A? :thinking:

Quick back of the envelope calculation using 4.0 Volts as the Vf, Vin of 13.2, 3.0 Amp to the emmitter, and 90% efficiency gives me 1.01Amps from the battery with KD claiming 1.0 Amps. For a buck circuit their numbers seem to make sense.

Another way to look at it, that is easier for my brain to wrap around, is in terms of Power.
4V*3A=12 watts to the emitter.
13.2V*1.01A = 13.3 watts provided.
13.3 Watts *.1= 1.3 watts lost in the 90% efficiency driver
Power to the emitter plus power lost to inefficiency (heat) should equal the total power supplied.
13.3W supplied -1.3W lost = 12 Watts provided to the LED

 

[darkzero]

Re: New P7 driver 3 amps?

For a buck circuit their numbers seem to make sense.

Oops, my mistake, wasn't paying attention. :thumbsup: