Recent content by steveb

Oh OK Pix I saw looked like it had more than 4, which I found surprising, as it and the x-star appear to be basically built on the same assembly line.. BTW, Any indication of a software 'lock' on either chip?

I got another x-star and it has three packs in fairly good shape. Starting teardown of the first pack I got because it's swollen too much to get back in the aircraft...

Ok, the two main chips are a MSP430 micro controller and the other is a BQ3055 gas gauge cell balancer chip. Both from TI. There is a development kit for the MSP430, so there might be a way to hook up to the bus system on the board to see what that is doing. The BQ3055 I'll have to do some...

Got the package after a lot of yelling at FedEx.. (Three or four shipments in the last 6 months using FedEx have ALL gone astray..) Fired it up, and it has three batteries that all charged, and one pack has about 12 cycles on it! Flew the pack I got with the first drone to as close to dead as...

If we can figure out a work around the Achilles heel of these units, (batteries,) I think they would be serviceable for quite a few more years. A.D.A has had some luck with mating up other RC packs and getting them in the air. His videos are very informative. I -hope- to be able to figure...

BTW, since I retired and no longer have access to the shop gear, I picked up the 6ghz version of one of these spectrum analyzers.. https://rfexplorer.com/ Works pretty well.

Too bad they don't apply for a few chunks from the various ISM bands.

Interesting. Anybody have a current FCC ID #? That should lead to docs that would outline the frequencies used.

Poking around the FCC site, they show 2.4 gig and 900 mhz are the two frequencies in use for the EVO2 pro.. (Also internal pix for the EVO2) For the PRO: https://fccid.io/2AGNTMCP2409A EVO2: https://fccid.io/2AGNTMC2409A

I will have to get the part #s off of the chipset and see if we can somehow figure out how to get into them and look at how they are programmed. I stumbled across someone else (I forget who,) that had a service where they could re-program some BMS boards, but they didn't mention the Autel ones...

ADA, would you mind measuring one of the old LiPo packs and tell me what the physical dimensions are of the actual battery pouches? I've found a few LiPo packs on one of the Chinese sites, but until my latest acquisition gets here, I'm loathe to tear my one battery pack apart... Looking at...

I just 'bit the bullet' and purchased another entire drone kit for $400 that includes three batteries. That will give me four to mess with, and spare parts. (The three batteries and charger on Ebay have been bid up to $405 so what the heck. Might as well get spare parts as well as three...

Could you see if you can either remove some of the conformal coating and / or tell me what the numbers are of the chips in the photos ending in 135 and 143? In 135, it's the one in the center of the board, in the bottom 1/3 of the picture, (I rotated it to try to read the number,) and in 143...