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Search: Posts Made By: eccerr0r
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 05:19 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

It's probably the way it is. 90C is hot, but it could be hotter.
Also have to consider, is it hot when the heater/TRIAC is "off"? Should get some reprieve when the heater is off as it shouldn't...
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 11:42 AM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

No you don't want to peel mica, it's one of the characteristics that it can be split very thinly. And no there's no adhesive layer. Though thinness helps heat conduction, it also encourages shorts...
Forum: General Electronics Technical Discussion 08-01-2021, 07:50 PM
Replies: 48
Views: 1,463
Posted By eccerr0r
Re: Here is a good used source for 18650 batteries

Well if the tool requires all connections of the battery connected to the tool for it to work (i.e. all interstitial connections), then likely it does do protection.

I really need to get something...
Forum: General Electronics Technical Discussion 07-31-2021, 08:29 PM
Replies: 48
Views: 1,463
Posted By eccerr0r
Re: Here is a good used source for 18650 batteries

balancing is only used for charging anyway, protection is most needed for discharge and only minor for charging (charger can handle overcharge).
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-31-2021, 03:30 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

You probably could just stick your multimeter probes into the heatsink compound and see if there's any conductivity.

No need to scrape or scrub the heat sink, just need to make sure the surfaces...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-31-2021, 07:08 AM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

TBH the only thing that makes sense ASSUMING you assembled the TRIAC properly is that your heatsink compound is conductive or you somehow have shrapnel on the screw.

Actually I'd have to say:...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-30-2021, 10:52 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

new hole is unlikely going to fix the problem.
BTW that plastic shoulder washer... if you're screwing the screw in, the screw is too big. The screw should slide into the plastic.

The screw...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-30-2021, 06:29 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

If you perhaps created some shrapnel that could have pierced through the insulator, but I've never had this happen. Never had a TO220 short with the heatsink when I have all the correct hardware...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-30-2021, 05:31 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

Sigh...so it turns out something silly... If we can't trust measurements, what can we trust...

dirty probes? Probes have sharp points for a reason - to dig through thin oxide layers.

Using two...
Forum: General Electronics Technical Discussion 07-28-2021, 07:14 AM
Replies: 48
Views: 1,463
Posted By eccerr0r
Re: Here is a good used source for 18650 batteries

Anyone seen how those large 3.2V LiFePO4 cells are made, like those huge prismatics? Are they built with a ton of small cylindrical cells in parallel or are they one big cell? (Usually these are...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-27-2021, 09:22 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

Well you're right it is MT1 MT2 Gate, but sorry, no additional clues why it's frying. You're on your own.
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-26-2021, 05:36 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

Proverb: "The fast acting transistor always blows first to protect the fuse." -- unknown
Forum: General Capacitor Questions & Issues 07-26-2021, 03:10 PM
Replies: 10
Views: 255
Posted By eccerr0r
Re: J107 Tantalum cap burning inside a USB hub?

yes it's possible to get hot enough to catch fire, likely it's due to manufacturer defect whether it's a bad capacitor or an improperly assembled PCB. MLC and tantalum capacitors are known to go up...
Forum: Announcements & Related News 07-26-2021, 08:56 AM
Replies: 2
Views: 50
Posted By eccerr0r
Re: Panasonic exits VRLA market

And the Chinese companies too? Aren't they flooding the market? (incidentally, the photo in the link says... MIC...)

Kind of sad, lead acid batteries are "easy" to recycle where lithium ion's...
Forum: General Electronics Technical Discussion 07-26-2021, 06:29 AM
Replies: 21
Views: 445
Posted By eccerr0r
Re: Using a Variac to simulate UPS battery

yeah that's what he should do... Or just one car battery...

I wish I could do the same with my 18V UPS.
Forum: General Electronics Technical Discussion 07-25-2021, 11:45 PM
Replies: 21
Views: 445
Posted By eccerr0r
Re: Using a Variac to simulate UPS battery

Due to the low frequency of line voltage you'll probably need quite a bit of capacitance to "match" the voltage stability of a battery, probably 10millifarads would be a start?

My variac can only...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-25-2021, 08:49 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

what i'd like to see is how the wires connect from the PCB to the TRIAC... the wire colors don't seem to make sense from the limited photos of the wires in the existing pictures, alas it looks like a...
Forum: General Electronics Technical Discussion 07-25-2021, 02:58 PM
Replies: 21
Views: 445
Posted By eccerr0r
Re: Using a Variac to simulate UPS battery

testing UPS implies also testing switchover time..
You'll need massive supplemental filtering, filtering batteries is virtually unnecessary when using low or low enough esr batteries.
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-25-2021, 07:23 AM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

I think he does, https://www.badcaps.net/forum/attachment.php?attachmentid=241024&d=1626717671 but M4 is too big (should be M3 or #4), and the plastic shoulder washers for #6 screws seems rare.
...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-25-2021, 01:19 AM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

Did it blow when the heater wasn't supposed to be on, or was the heater supposed to be on at that point?

This is specifically to trigger the heater right? How is the chiller supposed to be turned...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-24-2021, 10:06 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

And that's why I'd suspect that the TRIAC should be fine as is controlling a shorted heating element, even... and it should end up throwing a breaker before it "instantly fries the TRIAC". With the...
Forum: General Electronics Technical Discussion 07-24-2021, 07:35 PM
Replies: 48
Views: 1,463
Posted By eccerr0r
Re: Here is a good used source for 18650 batteries

I need to get or design a battery analyzer or something to test cells...
Currently can only guess by seeing which cells give out first according to the BMS.
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-24-2021, 07:25 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

^ this

and again how do you know it blew or not, it would need to get hot to blow. It was rated for 15A after all, which would be in the range of tripping upstream fuses, wires, etc.

The key...
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-24-2021, 04:27 PM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

Nope
N-I-H-ism if I have to spell it out.
Forum: Troubleshooting Game Consoles & Other Weird Devices 07-24-2021, 09:18 AM
Replies: 299
Views: 4,964
Posted By eccerr0r
Re: Fixing a laboratory waterbath

Definitely not DIAC, DIACs do not have bands on them.
Yes that transformer is there solely for isolation. The whole design probably could be made one heck of a lot simpler with a MOC3041 but...
Showing results 1 to 25 of 500

 
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