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-   -   Castle - Make A Special Edition Monster (https://www.rc-monster.com/forum/showthread.php?t=12536)

Pdelcast 06.17.2008 03:29 PM
Quote:
Originally Posted by lutach (Post 182979)
I just had an idea that the more FETs would be better? The 1212-8 is roughly half the size of the larger PowerPak and I keep thinking the more the better as each FET will work less to produce the same power as less FETs. I know I'm not an engineer and what we think off might be possible in our heads, but not in true life application. But since you are working on the stackable Monster, when will the HV one be available? Will you be having other guys put the controller to the test or will it just be team drivers?
I gotcha -- what we really look for during design is the silicon (or RDSon) to footprint ratio. So if you calculate milliohms / mm^2, you can compare silicon ratio pretty directly from FET to FET. Right now it's pretty tough to beat the 5x6mm leadless packages for up to 100V.

I haven't completed the layout of the control board yet -- I'm using a 72V maximum input switching BEC for the HV version of the board -- But I'll make it so that an external BEC can be used (Brian!)

BrianG 06.17.2008 03:38 PM
lol, I was just pokin' fun at ya Patrick. :wink: I suppose you can keep the BEC in there if you get the problem with the current MMM worked out.

Pdelcast 06.17.2008 03:38 PM
Quote:
Originally Posted by BrianG (Post 182987)
lol, I was just pokin' fun at ya Patrick. :wink:
:whip:

lutach 06.17.2008 03:38 PM
Quote:
Originally Posted by Pdelcast (Post 182984)
I gotcha -- what we really look for during design is the silicon (or RDSon) to footprint ratio. So if you calculate milliohms / mm^2, you can compare silicon ratio pretty directly from FET to FET. Right now it's pretty tough to beat the 5x6mm leadless packages for up to 100V.

I haven't completed the layout of the control board yet -- I'm using a 72V maximum input switching BEC for the HV version of the board -- But I'll make it so that an external BEC can be used (Brian!)
Ok, so basically being able to switch all the FETs, it would be possible to get a lot of FETs in a PCB that is a little larger then what the Monster Max uses. So a ESC that can go as high as 400A is possible to keep things of the safe side if one wants to use a Neu 1527/1D, 2215/1Y, 2230/1Y or a Lehner 3080-5. Patrick, I would put a high priority on such a controller :lol:. We are hungry for it.

BrianG 06.17.2008 03:41 PM
Quote:
Originally Posted by Pdelcast (Post 182988)
:whip:
I suppose that means that if you know I'm buying one of your ESCs, you'll personally make sure it explodes into flame when I turn it on?

Pdelcast 06.17.2008 03:43 PM
Quote:
Originally Posted by BrianG (Post 182991)
I suppose that means that if you know I'm buying one of your ESCs, you'll personally make sure it explodes into flame when I turn it on?
Hmmm, just give me your personal IP address, I'll key the software to destroy any controllers plugged into your computers. :lol:

Pdelcast 06.17.2008 03:45 PM
Quote:
Originally Posted by lutach (Post 182989)
Ok, so basically being able to switch all the FETs, it would be possible to get a lot of FETs in a PCB that is a little larger then what the Monster Max uses. So a ESC that can go as high as 400A is possible to keep things of the safe side if one wants to use a Neu 1527/1D, 2215/1Y, 2230/1Y or a Lehner 3080-5. Patrick, I would put a high priority on such a controller :lol:. We are hungry for it.
Well, the design I'm working on now should handle any of those motors with ease. Versions with 60 and 120 FETs will be first.

It won't be "moderately priced" like the MMM. :cry:

BrianG 06.17.2008 03:46 PM
OK, it's 70.141.107.6 :lol:

Anyway, a higher price is ok. It would be a steal and even double or triple the price of the MMM...

lutach 06.17.2008 04:18 PM
Quote:
Originally Posted by Pdelcast (Post 182996)
Well, the design I'm working on now should handle any of those motors with ease. Versions with 60 and 120 FETs will be first.

It won't be "moderately priced" like the MMM. :cry:
Around $300 would be really hard to keep in stock. Please add me to the top of the list for that one and I can send you payment right now for 2 maybe 3 units. I'll be the guinea pig if any problem arises. I wouldn't mind testing a units as well.

MetalMan 06.17.2008 07:40 PM
Quote:
Originally Posted by BrianG (Post 182997)
OK, it's 70.141.107.6 :lol:
Uh-oh :surprised: :diablo:

Pdelcast 06.17.2008 08:03 PM
Quote:
Originally Posted by BrianG (Post 182997)
OK, it's 70.141.107.6
Got you now! :diablo:

Wait a minute -- That's MY IP address! Dangit! :oh:

Arct1k 06.17.2008 08:08 PM
Nice! I say lets get all these MMM fixed first and CC earning some money and rep points again before going for the BFMMM.

BrianG 06.17.2008 08:20 PM
Quote:
Originally Posted by Pdelcast (Post 183068)
Got you now! :diablo:

Wait a minute -- That's MY IP address! Dangit! :oh:
You weren't supposed to catch that! :smile:

pb4ugo 06.18.2008 11:23 AM
Quote:
Originally Posted by Pdelcast (Post 182996)
Well, the design I'm working on now should handle any of those motors with ease. Versions with 60 and 120 FETs will be first.

It won't be "moderately priced" like the MMM. :cry:
I'd buy a couple. I agree $300 is a good target, but I think they'd sell at a price higher than that.

BrianG 06.18.2008 11:28 AM
Quote:
Originally Posted by pb4ugo (Post 183311)
...but I think they'd sell at a price higher than that.
Yeah, just look at Schulze's. Talk about expensive! $300-$400 for a "proper" 200A 12s ESC is more than fair IMO. Heck most of us were paying at least $200 for a 100A 4s ESC before the MM came out!


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