Artur,

You are an artist when it comes to modifying ESC. I can't wait to see your own creations.

OT: I have something for you to fix for me. I have a nice 60A controller that was working wonderful in my Recoil with my Mega ACn16/15/1, but I changed the timing on the controller by mistake and it fried a couple of FETs. The controller uses the On Semi's NTMFS4833N and I would like to know if there's a better replacement for it. Sorry to bring an off topic item to this thread.

Hi Luciano,
I do not have any particular part number in my mind, haven't looked yet for better replacement, but at current moment 4833 FET at 5S is hard tro beat performer.
Onsemi has a newer fet in the same form factor with enhanced thermal properties but so far I cannot find how it is better then 4833.
While DPak-7 is still thes best, but that wasn't the question. right?
You need to be very good with control circuit, while talking to DPak-7 and I am not sure what you are looking for either so far.
Bottom line for 5S ESC I do not have any better fet then 4833.
Anything better then that requires pcb layout with super heavy copper or different approach for power leads.

Patrick is not helpfull here, at least for me, he likes to talk but in reality he is just a business-man... I guess he is very proud of his 11 million business

P.S. I am TUI :)

I need a ESC to be fixed. It's a small 60A controller that uses the OnSemi's 4833. I burned a couple (Maybe a few) and I would like to get it fixed, but I wanted to know if there's a better MOSFET out there. The ESC that I have is only rated for 3S (Maybe 4S) and I don't want to send it all the way to China.

Regards.

Send it to me i'll fix it for you...

Ok, but do you have the FETs there? I haven't been able to find small amounts of the 4833 and that's why I asked if there's a better FET available.

Regards.

I thought you can provide parts:)

You can get samples from ON Semiconductor...

I do not have them.

I can, but for large quantities. I'll give my rep a call tomorrow to get some samples. He'll be a bit shocked :lol:.

Artur,

I have the 4833 coming in probably tomorrow.

Please look at the following datasheets:

http://www.infineon.com/dgdl/BSC014N...1a38f5a96704e8
http://www.infineon.com/dgdl/BSC016N...13de4a19bb0334
http://www.st.com/stonline/products/...l150n3llh5.pdf
http://www.onsemi.com/pub/Collateral/NTMFS4833N-D.PDF

Which one looks to be the best out of the 4 listed? This is what I was asking before, if there's better MOSFET then the 4833.

Artur sorry to hijack , R1 Pro is on the way which i will want to get modded like Jeffs .
Check your PMs from yesterday:wink: , i will send you my MM to get modded when i get that back i will then send you the R1 pro.

Artur,

I have the 4833 here with me and will ship it and the esc out to you soon.

Regards.

Edit: I sent you an e-mail with confirmation number Artur.

Mike's ESC is operational again
 

Well, as promised, Mike's ESC is fixed and ready for testing again.
Still not clear what went wrong with brains pcb...

Meanwhile, I am in process of moving, so cannot accept any orders until I am done and my place is ready.
I am hoping to be back in October.

Just a little update on the GriffinRU R1Pro I am running. Ran it again this weekekend at round 3 of the Prarieland Shootout. Once again It ran with no issues. Temped a 154F on the esc after the 15 minute B main. This is with no fans at all. So all is good. I dont forsee ever removing this spedo from my 808. :mdr:



If anything changes I'll let you guys know, but to date this by far my favorite 1/8 buggy race esc.

How much of an improvement is the modified version over running an out of the box version with the upgraded cap?

I'm loving the hell out of my R1 Pro to the point of recomending them to everybody and ordering five more. I'd be interested in having the mods done to all of them if reasonably priced and improved performance.

Thats a hard question to answer exactly. I ran it before the mod mostly on the indoor track in the winter when it was much colder and got similar temps. This last weekend the modified esc got a pretty good workout and temped very well at only low to mid 150's with no fan after the 15 minute main. Thats pretty good even for the big escs I was ruinning. Edumakated was running his buggy in the same conditions on 4s rather than 5s and getting higher tmeps on his MMM without a fan. The 4s may have been harder on the esc than 5s as far as heat goes though so, if I had to compare it I would say it is at least as good as the MMM without a fan.

Not sure if that helps you or not.

Keep running it as is. If you have temp problems then have Artur mod it. He out of buisness for a bit right now anyway so you might as well run it. By the time he is ready to go again this thing will have been throught the paces a number of times and I should have a better long term assesment. So far its has been stellar for 2 race days. I still havent been to my regular track with it though so that will give me a better sense of how it performs against the MMM.

What cap did you use in the 1st post?
Anyone know what size the G11 Cap is?
http://www.teamtekin.com/cart2/asp/i...11CapSmall.bmp

Here is what Tekin said about using the R1 Pro in 1/8 scale on their Forum
The R1pro is not designed for 1/8 applications, period! However we know that people are using it in these applications so we are offering information to support it. It does work pretty well if you understand what needs to be done. We are working on the Rx8 which is designed for 1/8 scale. We are also working on 1/8 scale motors.

We started this thread just to save us a lot of warranty replacement costs on the R1pro since we know people are using it in 1/8, but do not admit it when they send them in for service. We can't really stop them so we might as well give them information to save us money and save them disappointment. Another reason we are willing to support the R1pro users in 1/8 scale is so we can learn as we go and see what changes need to be made to make the Rx8 the shiznit.

With 4s lipo or higher you must use a larger and higher voltage cap then comes with the units. The cap supplied is only 16V and can be used up to 3s lipo. It is a very impressive little stud, but only 330uf. Even on 2s lipo we recommend 2 in parallel with extreme loads.

We really like the Panasonic FM series. We are offering them in our online cart. You really cannot go to big, but 2 decent sized caps in parrallel is always better. Also critical to keep the leads short. Dangling them on long wires kills most of the effectiveness.

The BEC cannot supply very much power when it has to step down the higher voltages. You must use a separate BEC module and unplug the red wire in the receiver plug.

Many people report that the R1pro handles the 1/8 scales with no heatsink or fans. This is very dependent on your setup, traction and driving style. Outdoor temperatures can also have a large effect. A fan blowing on the solder posts can remove a lot of heat. The solder posts are very good heatsinks since they are directly connected to the power planes.

We have raced competitively in 1/8 buggy and truggy with the R1pro on 4s lipo. Geared to about 45mph and seeing around 15min runtime on 4s, 4800mah lipo batteries. 5s lipo runs cooler, 6s is pushing the fet limits and we do not have much testing at this level.

Please feel free to post your experience and ask questions. We will provide as much good information as we can. Remember this is not really the intended application, but you guys always push the limits and we are willing to support it. If we can not stop it, we might as well join in and learn from it.