stack em baby!

This topic has 25 replies, 9 voices, and was last updated 21 years, 7 months ago by jamiekulhanek.

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- March 2, 2004 at 5:31 am #12044
  ph2t
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  Posts: 2088
  Here it is, triple stacked fets on a bit PCB.
  
  The torque is killa!
  
  Just thought I d share……..
  
  :p
  
  ph2t.
- March 2, 2004 at 5:32 am #49915
  betty.k
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  Posts: 2487
  HAHAHAHAHAHAHAHAHAHAHAHAHAHAHA:p:8ball:
- March 2, 2004 at 5:37 am #49916
  ph2t
  Participant
  Posts: 2088
  You’ll be eating those words tomorrow when the beast this PCB will be sitting in makes mincemeat of your ramp!
  
  ph2t.
- March 2, 2004 at 10:57 am #49917
  micro_Amps
  Participant
  Posts: 1290
  How high can we go?
  So I guess in Mini Z terminology, this is a 4 x 3 stack. :DuA
- March 2, 2004 at 4:10 pm #49919
  jamiekulhanek
  Participant
  Posts: 2563
  Usually in mini Z’s we only modd the ESC side, because the FET on the motor side can supply plenty of juice to the tiny steering motor. So i guess its more of like a 3×2 stack for each the steering and Motor.:smiley16:
- March 2, 2004 at 7:06 pm #49926
  ph2t
  Participant
  Posts: 2088
  Quote:
  
  Usually in mini Z’s we only modd the ESC side, because the FET on the motor side can supply plenty of juice to the tiny steering motor. So i guess its more of like a 3×2 stack for each the steering and Motor.:smiley16:
  
  nah dude:dead:. The steering is not fet modded in the above pic. There are four fets that combine together to make the motor drive. On the mini-z there are two fets per micro-8 package, that’s why you only stack two actual components on the z pcb.. So it is still a 4×3 so blah!:smiley2:
  
  ph2t.
- March 2, 2004 at 8:49 pm #49928
  barto_85
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  Posts: 1321
  oooh, ph2t has been studying. good stuff ph2t, you are a real nerd.
- March 3, 2004 at 3:34 am #49931
  jamiekulhanek
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  Posts: 2563
  Quote:
  
  So it is still a 4×3 so blah!:smiley2:
  
  ph2t.
  
  Hahahaha i get ya now, i know very little about the bit electronics:p
- March 3, 2004 at 3:35 am #49932
  jamiekulhanek
  Participant
  Posts: 2563
  Thats right they are only those weeny little 3 pin FETs, so thats why you need 4 stacks.
- March 4, 2004 at 8:58 am #49944
  Evo
  Participant
  Posts: 16
  Hey hey!
  
  Nice mod, ph2t!
  
  But jamie.. Remember that this probaly would be faster that a stock mini-z!
  
  🙂
- March 4, 2004 at 6:48 pm #49947
  jamiekulhanek
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  Posts: 2563
  you reckon?? 18km/h is the speed of a stock z.
- March 4, 2004 at 7:25 pm #49953
  betty.k
  Participant
  Posts: 2487
  jamie, remember ph2t’s original monster? that pushed 20 kph, accurately measured on micro amps’ dyno. that was a single stack dual cell. he’s using the same drivetrain setup in this one, and this is a quad cell with triplestack fets. do tha math!:evil::8ball:
- March 4, 2004 at 7:43 pm #49954
  jamiekulhanek
  Participant
  Posts: 2563
  ok thats gotta be about 40km/h
- March 5, 2004 at 3:38 am #49961
  brendan
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  Posts: 377
  u would be able to get some killa air with that!:evil:
- March 5, 2004 at 10:16 pm #49967
  micro_Amps
  Participant
  Posts: 1290
  I think I might know how the landings turn out though. :D:D:D.
  Somehow, I dont think the occupants would survive.
  :)uA
- March 7, 2004 at 6:21 am #49970
  z-beam
  Participant
  Posts: 2265
  these fets dont appreciate a bit of rough play eh?
- March 7, 2004 at 6:42 am #49972
  jamiekulhanek
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  Posts: 2563
  He means the little bit people inside the car:):smiley2:
- March 7, 2004 at 6:48 am #49973
  leonli17
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  Posts: 602
  that was what i thought, there should be someone in the car when it crashed because we are way better driver than them.:smiley2:
- March 7, 2004 at 6:55 am #49974
  jamiekulhanek
  Participant
  Posts: 2563
  yeah its their fault the car crashed!!! we are all perfect! hmmmmm 1/64 crash test dummies….
- March 8, 2004 at 8:24 pm #49986
  z-beam
  Participant
  Posts: 2265
  micro amps, is it true you cant fet a superbcg?
- March 8, 2004 at 10:15 pm #49987
  micro_Amps
  Participant
  Posts: 1290
  Yeah, pretty much.
  I spent a while on it a few months ago with no result. Things might be different now with the extra stuff I’ve learnt, but there’s still the problem of the cars ‘running on’ when they go out of range, and that was enough to turn me off them.
  :sad:uA
- March 9, 2004 at 3:49 am #49992
  z-beam
  Participant
  Posts: 2265
  thats bad news! any ideas why it didnt work?
  
  any way to boost the transmitter to increase range?
  
  i have got 1 super bit (out of three) that doesnt have the “run on” problem, and the other two only get affected severly when the power is almost emty.
- March 9, 2004 at 5:26 am #49996
  leonli17
  Participant
  Posts: 602
  SBCGs are pretty good. they do deliever more current to the motor than BCG. But not as much as a FETmod. There is no problem for a SBCG to be same accleration as a FETmod car with same motor on a very smooth surface. I’m happy with SBCG apart from they have less custom mods right now. THey are verylow so they are really good for on-road racing. I put a lowered shell on a SBCG chassis with 4.2 and it never fliped!
- March 9, 2004 at 7:11 am #49998
  z-beam
  Participant
  Posts: 2265
  i am forever sold on the sbcg’s. they are much nicer to look at, race and the controller feels so nice compared to standard bcg. i hope to get the ferrari set next and then get two more chassis’ to complete the set of 6 frequencies.
  
  then i’m going to get 5 mates to try and beat me on my own track at once!
  
  has anyone compared the pcb’s of the sbcg and bcg yet? what are the differences appart from crystals and chips?
- March 10, 2004 at 6:23 am #50014
  leonli17
  Participant
  Posts: 602
  um…the size of SBCG PCB is samller(obviously). And not much other than crystals and chips because that’s what they made up of.
- March 10, 2004 at 4:57 pm #50016
  jamiekulhanek
  Participant
  Posts: 2563
  That i can see there is no crystal on either PCB.
  
  The SBCG PCB uses revrsed logic signals which is why they run on sometimes i believe.
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