Charlie Brown

[Charlie Brown]

ph2t, this is all just genius…AWESOME….but could you show us some pics on attaching the motor to the motor terminals on nelly? Thanks man!

Edited by – Charlie Brown on 08 July 2004 08:49:30

[Charlie Brown]

Damnit jamie, now you made me want one. I wonder how much a W.N. costs…

Did you get the motor mount version? If so, how did you go about mounting it, did ph2t include a plug to solder to the motor?

[Charlie Brown]

http://www.chaserrc.com/product.php?op=list&pcatid=2

Look at the last item, the “m’z hand wound high performance motor”. Right there could be an affordable example of a “patternwound” motor, possibly better than NML’s motors….

[Charlie Brown]

Quote:

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ph2t, thought I’d try to help you with finding some FETS with a high current handling capability, and a low RDS on value at 4.5V.

http://www.vishay.com/mosfets/r-ds-on-lteq-10-milliohms/i-d-max-gteq-20-a/

Some examples:

SUM110P06-07L- 110A, 0.0088 ohms RDS on value at 4.5V, P channel
SUM110P04-04L- 110A, 0.0062 ohms RDS on value at 4.5V, P channel
SUM110N02-03P- 110A, 0.0052 ohms RDS on value at 4.5V, N channel
SUM110N02-03- 110A, 0.0026 ohms RDS on value at 4.5V, N channel
SUM110N03-03P- 110A, 0.0026 ohms RDS on value at 4.5V, N channel

lol, nice work. don’t see why you couldn’t use those. Their pkg’s are big though. I like to be as small as possible. The fets I’m using have stats better than those but thanks….lol….

lol, well since they’re bigger they could probably handle more heat/power or something…haha

[Charlie Brown]

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how the hell do u replace a mosfet. its crappy cause i live in byron bay on the coast and not many people here have z’s. the fella at my hobby shop is pretty smart he might be able to fix it. yay

You have to desolder them from the board…Using a soldering iron, heat the legs…you might wanna pick up a desoldering braid from the store…Place it carefully on the mosfet leg/s, heat it with the iron (making sure the iron doesn’t touch the chassis….lol), and the braid will absorb the solder off the legs, but do it carefully or you could melt the copper pads on which the legs are soldered to.

And those people in your area who don’t have Z’s (including Iwavers) don’t know what their missing…lol

[Charlie Brown]

ph2t, thought I’d try to help you with finding some FETS with a high current handling capability, and a low RDS on value at 4.5V.

http://www.vishay.com/mosfets/r-ds-on-lteq-10-milliohms/i-d-max-gteq-20-a/

Some examples:

SUM110P06-07L- 110A, 0.0088 ohms RDS on value at 4.5V, P channel
SUM110P04-04L- 110A, 0.0062 ohms RDS on value at 4.5V, P channel
SUM110N02-03P- 110A, 0.0052 ohms RDS on value at 4.5V, N channel
SUM110N02-03- 110A, 0.0026 ohms RDS on value at 4.5V, N channel
SUM110N03-03P- 110A, 0.0026 ohms RDS on value at 4.5V, N channel

[Charlie Brown]

Yeah I got the hint…what I did was stupid.

After some more analyzing, I understand ph2t’s diagram.

I’ll admit I was being a twat back there, trying to create my own way of the h-bridge when I don’t know the h-bridge basics.

Let’s just forget all this sh1t, and continue what was interrupted before I started posting….

Ph2t, are you selling these babies?

[Charlie Brown]

Quote:

You guys should know better than to pick on an 11 y.o. extremely mentally challenged american child!!

Remember:

Everytime you masturbate, god kills son_gokou/charlie brown (pinched off bp)

So guys….jerk away!!

Wow, you sure get pissed off very easily. 😯

Just a few questions as to how it works to get a better understanding….And you insult me and the country I’m living in. What’s wrong with this picture? :question:

[Charlie Brown]

Quote:

echo…….

your source pins are connected to the wrong terminals. review the various diagrams you have used for reference and you will see your mistake.

Charlie, I’m not going to answer your questions just because you are too lazy to search and find out for yourself. You did this to Jshwaa over at tinyrc, don’t expect to get away with it here. Grow up.

Btw, why do this diagram? Of what use is it to you?

Ok, if by “wrong terminals” you mean I should switch the terminals for the source pins, then I got it. I did a search for “GND”, I know it means ground, but vcc….look ph2t, I don’t take an electronics class, and I ask q’s to gain information. So, what is VCC? I did a search on that dictionary site…I’m still learning hardcore electronic stuff.

The diagram I was making was basically taking the FETs you used, but linking and connecting them the way Neurokinetik at TRC connected his FETs….

So, in the diagram I made, what I infer is that I have to switch the P channel and N channel source connections…correct?

[Charlie Brown]

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how the hell is this meant to make things easier?

the source pins on all fets are wired to the wrong voltage rail. the pchan fets goto Vcc, the nchan fets goto GND.

ph2t.

Umm..:dead:What’s vcc/GND?

I based the linking of the FETs on neurokinetik’s way of connecting the FETs, the gate signal pads connect to the gates of the corresponding P or N channel FET, the source pin is connected to the corresponding battery terminal (is that correct, or does that apply just to neuro’s way and not this way? :dead:), and the drain is connected to the appropriate motor lead….

But vcc? Does GND= Ground? AHHH…TOO…CONFUSING…I…NEED…AIR!!!

Edit: and by “easier” I mean “Easier to read”…..lol :question:

Edited by – Charlie Brown on 03 July 2004 22:51:09

[Charlie Brown]

Forget it.

Edited by – Charlie Brown on 04 July 2004 00:43:30

[Charlie Brown]

Wow! That’s a pretty clean solder job.

Though, you don’t have to solder the drain legs seperately, you can just connect them all together, it won’t make that much of a difference.

[Charlie Brown]

Quote:

the fets shown in Charlie’s last picture are the fets that need to be removed.

if you’re going to go external then Nelly is way better. The design Charlie links is good but the FETS are selected for the wrong reasons.

you don’t need insanly high current capable fets when you design for ultra low on-resistance. The low on-resistance in the fets is what gives you such high torque. the design above has a low on-resistance yes, but NOT as low as what Nelly can do ;).

Given Nelly’s ultra-low on-resistance, the size of the fet can be smaller, this is because the fets in nelly don’t dissipate lots of power (less than 1W). test’s have proven this…..

ph2t.

lol, I guess so, but if you stack FETs, doesn’t the RDS(on) value go down? So if you stack the FETs, there’s less resistance, correct?
Plus, Nelly has a low resistance, but the power dissipitation is pretty low…

Meh, your call, I’m not pestering anyone to do what I’m going to do.

Edited by – Charlie Brown on 30 May 2004 08:47:30

[Charlie Brown]

Yeah, and as for an external FET mod, this should work, for those who don’t completely grasp the concept of ph2t’s woah nelly turbo…(no offense ph2t 😉 )

http://tinyrc.com/forums/showthread.php?s=&threadid=14725

the diagram:
http://www.geocities.com/mastermind_sound_solutions/NFUD.html

From top to bottom, the first and third FETs are N channel IRL3705 FETs, the second and fourth FETs are IRF4905 P channel FETs. Apparently they are all TO-220 type FETs, you can get them at digikey.com (for american people), and http://www.rs-components.com.au for Australian people…

[Charlie Brown]

I’ll post up some pics of the Iwaver’s electronics.

Edited by – Charlie Brown on 28 May 2004 10:45:41

[Charlie Brown]

Sorry to revive an old topic, but I just have a few questions.

I fried the FETs on my Iwaver Mini-Z, and decided to remove them off the board. So, I desoldered the front, but I’m worried about the front solder pads being shorted. Also, I yanked the FETs off, which in turn, caused the drain legs to rip a nice section of traces off the board. :angry:

however, the solder pads for the source and gate connections are still OK, so I’m thinking of getting a solder sucker from RadioShack, and then soldering in wires and connecting it to an external turbo setup just like neurokinetik’s at tinyrc.com

So, any soldering advice?

[Charlie Brown]

You know what?

fett42, Gfunk, steelwoolghandi, and cheesecake were also demodded on MRCC, and kamen, ripper7777777, georc, and more mods were banned from there! Man, MK is a phucker!

Chuckster…

[Charlie Brown]

ALright, ph2t, didn’t mean any offensive suggestions….As for being in your home, I’m not sure about being an “international visitor” or a non australian of whatever. I didn’t think this would be only for australian’s, but if you want me to leave…..well, see ya…don’t know why I bothered registering. 🙁

Chuckster…

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