Mountain Bike Reviews Forum banner
1 - 15 of 15 Posts

·
Registered
Joined
·
251 Posts
With a MCE you have more options for the wiring, like 4 serial or 2 serial / 2 parallel. For the MCE are also a lot more optics available, particularly small ones. It is only a pity the small optics don't work.

Maxflex is a step up driver. But with only one P7 you have an forward voltage of only 3.7V, the battery voltage needs to stay below that. So for example li-ion battery's won't work for this setup.
 

·
Registered
Joined
·
11 Posts
Discussion Starter · #5 ·
superfast - thanks having looked at the MC-E and the P7, im not sure my soldering skills are up to the job :nono: , as far as the maxFlex goes i was think more in the line of multiple p7's more akin to Mr Trout's MC-E rig :thumbsup: so the step up shouldnt be an issue

Personally i toying with the idea of trying to cram 2/3 P7's in to an "Easy DIY" type set up. just trying to figure out how to get rid of the heat.
 

·
Registered
Joined
·
1,322 Posts
Many issue between the two

Color/bin : More available options with the MCE
Optics : More choices for MCE
Wiring : P7 is parallel only. MCE can be wired any way you wish
Drivers : Not many options for the P7. The P7 needs a high current.

I have been using the P7 anyway. Being the odd ball is a good thing.:thumbsup:

The Kaidomain driver with good results so far.
On full it puts out 2800 mA, so each diode is getting 700 mA.

A boom SS reflector can be easily modified to fit the P7. Just sand or grind away 2 to 3 mm from the base of the reflector and then enlarge the opening to about 9 mm.

Throw isn't too bad and there are no artifacts in the beam pattern.

No beam shots yet. Sooner or later I will take some and post pictures of the housing, beam shots, and assembly process.
 

·
Registered
Joined
·
11 Posts
Discussion Starter · #7 ·
odtexas - questions questions, - does this mean i need more than 1 driver for a 3 Led rig? (electronics was never my strong suit)

How many led are you running on your driver? Do you have any heat issues ?

i thought ledil has started making boom reflectors for the P7
 

·
Registered
Joined
·
1,322 Posts
Yes
1
no :) :)
Seriously:

1 driver per led, remember that each led is actually 4 diodes in one package. Current to run multiple multi chip assemblies would probably fry the driver.

I run 1 p7 with a modified MC-E Boom SS. I have two Amoebas courtesy of Scar. Sort of use his little beauty as a benchmark. I want a small , single light package that mounts to the helmet along with its battery pack.
Scar seems to have nailed this using two single diode led's. I am too clumsy to solder and run that many wires. 1 P7 or MCE will give you slighly higher lumens than the Amoeba light. Issue being that focusing of the multichip diode difficult with smaller optics.
Troutie brought up this very topic earler this week I believe.
Anyway I ran both of the Amoeba lights on the helmet and loved it. If I crashed or had an electrical failure I figured that I would still have one of the lights.

I am using 1 inch aluminum square tube from home depot. It is 2.25 inches long and has 3/8's by 1 inch aluminum flat stock JB welded to two sides of the tube. 3 slots are cut horizontally into each block for heat sinking.

In the housing is the P7 star, SS boom modified, 3/8 inch aluminum slug, driver, and the power switch.

No heat problems sitting still. It does get fairly hot to the touch though after about 45 minutes. The housing is cool during riding.

This is the first completed "production" light. Need to clean up the JB Weld and polish the housing a bit. Been using odd parts and bits from around the house to make several different lights and get the wiring worked out. Looking to standardize the process and be able to make a few all the same so parts are interchangeable.

If you don't standardize things you end up like troutie. :D



 

·
Registered
Joined
·
1,322 Posts
msxtr:
That is a communciation thing. English is my first and only language and it gives me fits.

I was refering to a question about running multiple p7's with 1 driver. Not possible with the Kaidomain driver without melt down.

So Kaidomain driver runs at 2800 mA giving each one of the 4 diodes in the chip 700 mA.

OP inquired to multiple p7's. Each would need its own driver.

znomit:
Have at it.:thumbsup: Been reading everyones great work here and on candlepowerforums for months. Everything accomplished is due to people like yourself, troutie, scar, acheselot, zen bicycle, etal.

Troutie:
I will let you do the dreaming. I am mildly compulsive and already have dreams of a mill. If I ever got one the wife would never see me. There are some variations to this chasis I think about, but I just want a simple single head light that can run 2 to 3 hours on a 11.1 V Lion battery pack.

Thank you all for the inspiration.:D
 

·
Registered
Joined
·
6,485 Posts
odtexas said:
....A boom SS reflector can be easily modified to fit the P7. Just sand or grind away 2 to 3 mm from the base of the reflector and then enlarge the opening to about 9 mm.

Throw isn't too bad and there are no artifacts in the beam pattern.

No beam shots yet. Sooner or later I will take some and post pictures of the housing, beam shots, and assembly process.
odtexas, I like this build...simple...compact...900lm(?)..like the Amoeba it should run with a small battery setup on the helmet....plus it's multi-mode. Looks like it might be easy to copy. :thumbsup: ...now about the throw...how far?:skep: ...and since msxtr forgot to give his trade mark parting comment, I will give it for him....BEAM SHOTS! :D
 
1 - 15 of 15 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top