The I "C" Red Battle Royale LPF Contest

[Wolfman29]

Well, the problem is the size constraints! I guess they need to be flattops, methinks.

 

[shokkunlasers]

I thought that too man cause of that the sony cell I recommended is flattop

 

[Wolfman29]

Awesome! I'll have to look into it Know of any places I can buy 'em on the cheap?

 

[shokkunlasers]

Yeah I know a place, but its a german site won't help you :na:

I think you just have to google them. I've found them on fasttech but I don't know if they are fake there $4.83 As-Is Sony US14500V 14505/14500 680mAh 3.6V Rechargeable Lithium Batteries (2-Pack) 2-pack - with carrying case at FastTech - Worldwide Free Shipping

 

[Wolfman29]

Hmm. Well, I'll take a look at it. I expect to pay ~$5-8 per battery if they are that good =p

 

[IsaacT]

Try fasttech for cheap flattops

edit: I got beat to it

 

[Wolfman29]

So good news! I discovered the reason why I was getting less current. It wasn't the battery. It was the FET I was using for switching. It was dropping excess voltage because, I think, that the potential difference was too low. Either that, or the FET couldn't handle the 3A I was asking of it (it is a 3A rated FET - figured I would try it, but now I guess I should probably get a higher-rated one).

EDIT: So after looking at the datasheet more closely now, I have discovered the problem. When Vgs = 4.5V, the MOSFET is only designed to go up to 2.6A. So, it would make sense that when it is 3.7-4.2V, it's probably around 2.4-2.5A. Which is exactly the current I am getting =p So I need a MOSFET that can handle 3+A when Vgs is >3.3V. To Digi Key!

 

[Lazerbeak]

Really great circuit design Wolfman! The video was great. Really neat button setup :beer:

~ LB

 

[ricktrent4]

you can use 2- of Matthew Ohrenberg/Mohrenberg 1800ma drivers and get 3600ma worked for me got around 3w

 

[Wolfman29]

Yes, and then it wouldn't be controllable....

 

[Mrcrouse]

In case anyone wants to partner with a machinist for this, I am free, and I am working on a design I would like to try. The front of this isn't done yet, as I am unsure of what is needed for mounting a C-mount and lens. Otherwise, TEC and fan build.



Going to just use a maglite body to make it easy to get a big power source.

 

[cantthinkofone]

C mounts need screws. And the correctional lenses are quite big in some cases.

 

[Mrcrouse]

I understand that much. Need actual dimensions and sizes though. Right now, the picture shows for a regular 12mm module build.

 

[Lazerbeak]

In case anyone wants to partner with a machinist for this, I am free, and I am working on a design I would like to try. The front of this isn't done yet, as I am unsure of what is needed for mounting a C-mount and lens. Otherwise, TEC and fan build.



Going to just use a maglite body to make it easy to get a big power source.

That's Awesome Mr. Crouse! Look forward to seeing a great submission :beer:

~ LB

 

[Mrcrouse]

Thanks! It is only going to get built though if I can find someone interested in it. :/ I don't really want to fool around with super expensive diodes, nor all the electronics in this.

 

[Lazerbeak]

There are a couple people who hopefully will be interested :thinking: Like the design though :gj:

~ LB