1.6W Ehgemus 14650 Pen Host W/Dual Flexdrives

^No point to a tri driven. No common diode diode would take the full 4.5A and two drivers will reach that easily. It would be difficult to find batteries up to the job too. If you have the space for 3 or more 18650s then you could find a linear driver to do the job.


Nice mod DTR!

M

You can use 10 Flexdrives, but the diode will only handle so much power before it starts to degrade. 2 is perfect.

Yep two flexdrives will get you to the maximum possible current the diode will run and do so without overheating.:beer:

Mohrenberg said:

wannaburn, i would assume the coins are there just to position the beam into place. It simply sitting on those coins like that wouldn't really do much for heat sinking anyways. Plus, with the entire host being a heat sink, it doesn't need it..

Click to expand...

I found somthing nice as HS for the driver
copper one
http://cgi.ebay.com/Cooler-Heatsink...215?pt=LH_DefaultDomain_0&hash=item414e1fb997
and Aluminum
Aluminum RAM VGA DDR DDR2 RAM Memory Cooler HeatSink - eBay (item 280425004361 end time Dec-12-10 00:12:50 PST)

What do you think? can it replace the coins?

kobi g said:

I found somthing nice as HS for the driver
copper one
Cooler Heatsink DDR DDR2 DDR3 RAM Memory RHS-03 Copper - eBay (item 280483576215 end time Dec-19-10 00:28:54 PST)
and Aluminum
Aluminum RAM VGA DDR DDR2 RAM Memory Cooler HeatSink - eBay (item 280425004361 end time Dec-12-10 00:12:50 PST)

What do you think? can it replace the coins?

Click to expand...

Keep in mind the main reason coins are used is for hosts that do not provide a flat surface that is direct contact to the host body to allow the heat to move through the coin to the host body. The mass of the coin really does not matter but what does matter is that it is thermally conductive and thin because there it normally limited space to work with in most hosts.

So if you were to use those sinks you would need to find a way to have them in direct contact with the host body and being square it could limit the surface area in direct contact. Also they look a little thick which would limit the space for it in the host.

At the beginning we used large chunks of aluminum but they were not in contact with the host body because we were worried about them being electrically conductive with the driver in contact with them. But it was like a glass of water and the heat being the water. They did allow the driver to run a little longer but the glass eventually becomes full and the driver overheated. The bigger the heatsink was the longer it lasted but it was not a continuous duty cycle.

I understand thanks for the info DTR.

Question: are there any coins that are not electrically conductive?

That is over the top dual drives in a pen host
I can't rep you any more the board won't let me :crackup:

@ WBS I don't know of any coins that are not conductive but if you are
using Arctic Silver to bond them then it should not matter as it is nonconductive.

:cryyy: I wish i had one of these.

You can, ask Santa to put it on your wishlist

Hey blord, this is not funny !

Nanolaser said:

:cryyy: I wish i had one of these.

Click to expand...

You don't need to cry. You could build one for yourself or convince me to part with this one.:eg:

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

rpaloalto said:

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

Click to expand...

Thanks.

I have been told this may be the most powerful pen sized host. Anybody seen one that puts out more in the same or smaller body?

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?

wannaburnstuff said:

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?

Click to expand...

They only seem to have issues with overheating when you go over 1A.