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Search: Posts Made By: eccerr0r
Forum: General Computer & Tech Discussion Yesterday, 05:03 PM
Replies: 5
Views: 94
Posted By eccerr0r
Re: Drive SMART status not showing up through RAID controller?

You have to watch your RAID.

Make sure your software alerts you whenever a drive gets kicked and you need to do due diligence to find out why it got kicked and make sure rebuilds succeeds each...
Forum: Troubleshooting Game Consoles & Other Weird Devices Yesterday, 12:14 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

should be able to also tell from the silicon a diode from a transistor. Photograph of the "decapsulation" would be nice.

Even if there's just a piece of metal that bridges two pins...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-22-2021, 09:16 AM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

Not sure they would frequently both short out at the same time when in parallel either. And surprised there's not a heat stress mark on the PCB.

I still would not discount it's a dummy device. ...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-21-2021, 04:05 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

It's very unlikely both the MOSFET gate and driver both fused at the same time, one will give way first. Also there are two MOSFETs in parallel and what's the chances both failed the same way. I...
Forum: General Electronics Technical Discussion 09-21-2021, 01:47 PM
Replies: 3
Views: 142
Posted By eccerr0r
Re: line powered filament LED lamps...

I'd imagine street lights, since aesthetics doesn't matter too much, use standard high reliability LEDs. I suspect that the LEDs could then be binned unlike "filament" LED strips.

The first...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-21-2021, 11:53 AM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

If gate is unconnected, it simply cannot be a MOSFET.
Forum: General Electronics Technical Discussion 09-21-2021, 09:41 AM
Replies: 3
Views: 142
Posted By eccerr0r
line powered filament LED lamps...

I was playing with one of those "filament" LED lamps. I noticed it seemed to flicker a bit...so I tried powering it with different things to try to extract information about it - noticed it seems to...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-20-2021, 09:59 AM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

I sure wouldn't use a jumper as a current amplification device.
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-19-2021, 11:36 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

BTW this will make people go :duh:
Look at the part number: TO247SHorT

:)

(Now replace the "or" with an "i") ...
Forum: General Electronics Technical Discussion 09-19-2021, 07:55 PM
Replies: 23
Views: 453
Posted By eccerr0r
Re: A 2200lm 7057 LED car lamp...

Yeah incandescent bulbs will run quite hot, depending on wattage and physical dissipation size. All of the heat must be dissipated, they can't get infinitely hot. Just that LEDs will melt down...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-19-2021, 07:44 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

Why are people assuming they are MOSFETs? Just thinking they could be MOSFETs doesn't make them MOSFETs.
Can't make an assumption, the clues are pointing away from MOSFETs too.

I'd say grind...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-19-2021, 06:20 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

I'm now 90% sure that's a dummy device.

---

oh...forgot to refactor the possibility of a dead diode... hmm. Maybe 45% dummy device, 45% diode, 10% I'm talking out of my ass. I have to put in...
Forum: General Electronics Technical Discussion 09-19-2021, 05:00 PM
Replies: 23
Views: 453
Posted By eccerr0r
Re: A 2200lm 7057 LED car lamp...

If there is no duty cycle listing written, 100% duty cycle must be assumed.
Fog, head, dome, courtesy, etc. lights might well be 100% duty cycle...

Aren't yellow lamps frequently used for fog...
Forum: General Electronics Technical Discussion 09-19-2021, 02:58 PM
Replies: 23
Views: 453
Posted By eccerr0r
Re: A 2200lm 7057 LED car lamp...

It was not written explicitly, not sure where you remembered that?
Forum: General Electronics Technical Discussion 09-19-2021, 09:35 AM
Replies: 23
Views: 453
Posted By eccerr0r
Re: A 2200lm 7057 LED car lamp...

How hot is too hot for LEDs..

Apparently commercial heatsinked LEDs fail the "if you can't put your finger on it you need a fan" test...

Then again it seems any LED lamp that produces more than...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-19-2021, 08:36 AM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

Do you have an avr transistortester or capacitance tester? How many pF capacitance do you see on the gate terminal of the "fried" transistor?
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-18-2021, 07:21 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

The way the circuit is hooked up, a fake transistor is not unreasonable... A diode is also possible. A mosfet being used for its body diode only is possible too but a floating gate is bad.

It's...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-18-2021, 02:24 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

Well I gave you one possible explanation which is not completely far fetched albeit evil explanation of what's going on. Yes I hate buried vias/buried pads and I think they're also frowned upon for...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-18-2021, 10:12 AM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

Depends on how much the battery is used... and how much it's not connected to external power. Those Tadiran batteries have been around for a while and probably has really low self discharge but I've...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-18-2021, 07:08 AM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

would be evil if caterpillar OEMed dummy parts that just short S-D and just used those as jumpers...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-17-2021, 08:54 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

Other end of the wire should still be continuous with some pad somewhere...at least one would hope they would design the tracks to not fuse before silicon or die bond...
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-17-2021, 07:27 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-17-2021, 12:07 PM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

are source or drain grounded? Drain or source connected out to the pins?
Found which pin is ground? battery 24V? 12V?
Those three pin axial devices are capacitors? What voltage/capacitance?
Forum: Troubleshooting Game Consoles & Other Weird Devices 09-17-2021, 09:01 AM
Replies: 64
Views: 1,146
Posted By eccerr0r
Re: Catapillar ECU repair, need N548AB replacement?

So this is BS, catapillar trucks have a lifetime of 10 or years max because the battery is not a FRU - and one must get a new ECU every 10 years?
Forum: General Electronics Technical Discussion 09-16-2021, 06:47 PM
Replies: 23
Views: 453
Posted By eccerr0r
Re: A 2200lm 7057 LED car lamp...

Since it's yellow, it was intended to be for turn signals.

There is one heck of a lot of LEDs on the cob: there's 78 total - 6 faces of 12 plus another 6 on the end - so 26 strings of 3.
Current...
Showing results 1 to 25 of 500

 
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