Cheap "high voltage" esc Quest

[MetalMan]

It's kinda hard to tell what exactly those are that blew, but to me they look like diodes (on the right). On the top left something else looks blown, but I don't know what it is.

[sikeston34m]

Originally Posted by MetalMan

It's kinda hard to tell what exactly those are that blew, but to me they look like diodes (on the right). On the top left something else looks blown, but I don't know what it is.

Those two components are connected in series to the center (red) receiver wire.

[lincpimp]

Internal BEC?

Do I win anything?

[sikeston34m]

Originally Posted by lincpimp

Internal BEC?

Do I win anything?

Ding! Ding!

Now let me tell you what you didn't win! LOL

The big square thingie in the top right with the legs. Well that is a linear regulator. Those things you hear about that reduce the pack voltage to 5v? Well that's the heart of it.

The two burnt thingies, I believe to be Diodes. I'm not 100% sure on that though. (Griffin, can you help me out here?)

One thing that was very puzzling about this is the fact that we have continuity between the red receiver (power) wire and the Black Negative.

I spotted a melted spot in the receiver wire. Very flat and I was thinking this was the source of the whole problem. I removed the wire. Problem is still there.

I removed the two burnt thingies and the continuity is gone. Even though continuity is now gone, I still don't have infinity.

I'm still getting .288 kohms between the Linear regulator and the red wire.

I believe the regulator chip is fried too, even though it doesn't show as much damage externally.

Can I remove the regulator altogether and run this ESC with the Opto Mod?

[lincpimp]

Well, from my extremly limited knowledge, the brain has to have some sort of regulated voltage. An opto isolated esc does not have the current ability of a bec built it, but must have some sort of regulated supply for the brain. Time for the smart people to tell you what to do.

[rschoi_75]

In the voice of Steve Urkel

"dddiiiidddd I doooo that...?"


oops. so it was the bec. umm... my fault.

[sikeston34m]

Are you out there Griffin?

[lutach]

I have to go get my daughter at school now, but if I have some time, I'll take a picture of what I got a few months ago. It is surprising. Artur, I might send a couple more stuff for you my friend LOL.

[lutach]

I'm getting trying to figure out who makes the driver of the picture posted by sikeston34m and now I can't find the manufacturer of the MOSFET (Edit: I found the MOSFET manufacturer) of the ESC in the pictures I have attached, but look at the brain board, it looks identical and the onlu differance are a few colors of some components and the drivers are from IRF (IR2103S). Good things will come out of this. I'll go take some pictures of the big car controller with this one to see if we get a match .

[lutach]

They are the same size, but the little one was closer to the camera and it seems bigger. I also attached a side view of the little controller.

[lutach]

And 3 more.

[snellemin]

oooh, the controller looks similar. I got mine working again. Gonna test it some more tomorrow.

[snellemin]

Did some more testing during my lunch hour. This is what I found:

It will not run the 7700kv mamba motor, even with 2s2p A123. Just sits there and stutters. However it does run the 3500kv c40 hacker motor on both 2s and 4s without issues. The esc was barely warm after the packs dumped.

[jzemaxx]

How does it run on 10S???...lol. That is what I'm waiting for...hehe

[snellemin]

10 AA batteries. I'll leave it alone for now. Put some foamies in the rear for the next TNT dragrace.