new P7 driver 3amps?

1 what

Enlightened
Joined
Jul 6, 2007
Messages
617
Location
Australia
I'm not an expert but I ordered 1 last night.....We'll see what it's up to when it gets delivered.
 

climberkid

Flashlight Enthusiast
Joined
Jan 19, 2008
Messages
2,100
Location
Goldsboro, NC
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

Flashlight Enthusiast
Joined
Mar 26, 2006
Messages
1,440
Location
13th Colony
Look nice on the spec but quite expensive for me...I'll wait for someone to test it out.
 

James35

Newly Enlightened
Joined
Apr 29, 2008
Messages
100
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

Newly Enlightened
Joined
Apr 5, 2008
Messages
183
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
 
Last edited:

James35

Newly Enlightened
Joined
Apr 29, 2008
Messages
100
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

Newly Enlightened
Joined
Jun 25, 2008
Messages
20
Location
Australia
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

Flashlight Enthusiast
Joined
Mar 26, 2006
Messages
1,440
Location
13th Colony
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

Newly Enlightened
Joined
Apr 29, 2008
Messages
100
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

Newly Enlightened
Joined
Apr 5, 2008
Messages
183
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.
 

TorchBoy

Flashlight Enthusiast
Joined
Jan 15, 2007
Messages
4,486
Location
New Zealand
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

Flashaholic* ,
Joined
Oct 7, 2003
Messages
4,459
Location
SoCal
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

Enlightened
Joined
Jun 13, 2007
Messages
217
Location
KCMO
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

Flashlight Enthusiast
Joined
Feb 7, 2008
Messages
1,053
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
 
Top