Old 11-22-2010, 12:34 AM #65
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

Oh, someone mentioned Tridriven....now, I know that there are no diodes which put out the max, but if you split 1.6A or so evenly between 3 drives, I imagine it would take a LONG time to heat up from the driver point of view....I mean, that is what? 530mAs for each driver?


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Old 11-22-2010, 12:49 AM #66
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

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Oh, someone mentioned Tridriven....now, I know that there are no diodes which put out the max, but if you split 1.6A or so evenly between 3 drives, I imagine it would take a LONG time to heat up from the driver point of view....I mean, that is what? 530mAs for each driver?
They only seem to have issues with overheating when you go over 1A.
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Old 11-22-2010, 01:37 AM #67
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

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Man DTR you just keep topping yourself with all these monster builds. I guess this is another record breaker for you on LPF. I have to get one of these and I know I'm not the only one. Kudos to you for finding that battery
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Old 11-22-2010, 01:56 AM #68
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

Actually, I was thinking putting 3 diodes in there with a dichro for 3.5W!!!
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Old 11-22-2010, 02:18 AM #69
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

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and he's not done yet.
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Old 12-03-2010, 12:51 AM #70
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

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Originally Posted by Krimzy View Post
You can use a 14670 protected lighthound battery for this, I emailed them and the battery is only 2.3mm longer then the 900mah sanyo batteries. The lighthound is protected and 1100ma
You could use it for a lower power build but the protection circuit would most likely limit the current to around 1A output. This is set to 1.5A output and draws 2.3A from the battery.

I think the way they can increase mAh rating is by decrease the amount of current that can be pulled from the battery.

Last edited by DTR; 12-03-2010 at 12:54 AM.
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Old 12-03-2010, 02:20 AM #71
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

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You think the battery can output enough for flexv5 set at 900ma?
I would say it should work. You may want to check and see what the max discharge rate is. A flexdrive will draw 1.6A running @ 900mA when the battery is fully charged and will pull almost 2A when the battery reaches 3.4V.

Just checked these numbers with my bench supply.
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Old 12-31-2010, 04:54 AM #72
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

I built another dual flex 14650 tonight with the drivers set to 850mA each just to see how it would work. 1.8W






EDIT
After playing with this for a day I believe this is as high as this host/battery combination should be pushed. It will run for 1 minute 15 seconds with a fully charged battery before it starts blinking from trying to draw more current than the batteries can supply. But if you let it rest for 30 seconds you can go at it again all over with the only exception when the battery starts getting low it will happen quicker and the battery life it around 15-20 minutes between recharging. After 1 minute the host is very warm but moving the heat very efficiently into the tail of the body so I am not concerned with overheating the diode. I have felt how hot they run these diodes in the projector and it is damn hot even with the fans cooling the aluminum block. All in all I may keep this as a personal unit. Most very compact units have a duty cycle around the same so I like it very much.


I also built a 1.5W/1.7W and it will run like the original without the restrictive duty cycle.

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Old 01-20-2011, 10:11 PM #73
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

Great review, but I just dont see the need for dual flexdrives. It seems to be a trend here. Anyone mind explaining?
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Old 01-21-2011, 02:00 AM #74
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

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Great review, but I just dont see the need for dual flexdrives. It seems to be a trend here. Anyone mind explaining?
more power and less work for one driver.
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Old 01-21-2011, 05:03 AM #75
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

^^^^^ Yep it allows you to go over the 1.5A max of a single flexdrive and with them both set to 900mA or under you don't need to take great steps to heatsink the drivers.
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Old 01-21-2011, 04:56 PM #76
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

If it is a 1200mAh battery, how does it pull 1.55Ah?
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Old 04-06-2011, 10:04 AM #77
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

hi, is there, by any chance, you would make another one of (1.6W 445nm Ehgemus 14650 Pen Host W/dual flexdrives set to 760mA each) and sell it to me? G-1 or aixis in this unit, which has better dot?

Thanks..
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Old 04-06-2011, 05:01 PM #78
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

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hi, is there, by any chance, you would make another one of (1.6W 445nm Ehgemus 14650 Pen Host W/dual flexdrives set to 760mA each) and sell it to me? G-1 or aixis in this unit, which has better dot?

Thanks..
Get a host from Ehgemus and send me the module and I will build it. Check my sales thread for pricing on modules.

http://laserpointerforums.com/f64/dt...tml#post873613
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Old 04-06-2011, 05:22 PM #79
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

I love this one, Must be hard to fit both flex's in that bad boy! I have a few 1.8A drivers, but need two batteries. I think this host, made for two 14650's would be so bad ass at 1.8A!
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Old 04-06-2011, 07:26 PM #80
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Default Re: 1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

Yep and these just got better. Here is a little peak at a the new module that Ehgemus is offering. Has a place to sink the flexdrive for 1.5A in any of his hosts.

Old module on top and the new module on the bottom. More to come as I get this unit built.



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