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Search: Posts Made By: clearchris
Forum: Equipment Usage, Soldering, Techniques, and Reviews Yesterday, 11:37 PM
Replies: 150
Views: 18,599
Posted By clearchris
Re: New tool to find short capacitors on motherboards : shorty with display

That sounds like why he added the constant current source for the probes to limit current through the item being tested. IIRC, he said it was limited to 30ma. Probably a really good idea.
...
Forum: Equipment Usage, Soldering, Techniques, and Reviews Yesterday, 02:41 PM
Replies: 12
Views: 395
Posted By clearchris
Re: Short finder

Two things, the PCB layout is missing and kripton believes there's something wrong with the schematic.

So I think in the other thread people were discussing how to fix it. Also discussion of...
Forum: Equipment Usage, Soldering, Techniques, and Reviews Yesterday, 02:29 PM
Replies: 150
Views: 18,599
Posted By clearchris
Re: New tool to find short capacitors on motherboards : shorty with display

I read through the thread and found this post by krypton. Sounds like he added a voltage regulator and constant current source to the pnp transistor. I believe he later said he removed the...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 07-01-2022, 10:00 PM
Replies: 150
Views: 18,599
Posted By clearchris
Re: New tool to find short capacitors on motherboards : shorty with display

I checked the datasheets, and didn't see anything that would indicate less performance or accuracy at 3v3 vs 5v. Maybe I'm missing it?

I'm asking because it would be really nice to sub out a pi...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-30-2022, 01:07 PM
Replies: 150
Views: 18,599
Posted By clearchris
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-30-2022, 12:37 PM
Replies: 150
Views: 18,599
Posted By clearchris
Re: New tool to find short capacitors on motherboards : shorty with display

And sub in some chinese regulator to make BOM for a 3 usd board, there's your voltage sag. Can't say I'm surprised. I almost never use the on board power to run peripherals.

We could easily...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-30-2022, 10:30 AM
Replies: 150
Views: 18,599
Posted By clearchris
Re: New tool to find short capacitors on motherboards : shorty with display

From the other thread, here's megaraider's 2c.

"The current source problem arises from using the 5V output line from the Arduino Nano.
As he wrote somewhere he couldn't figure out why the voltage...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-27-2022, 10:41 PM
Replies: 12
Views: 395
Posted By clearchris
Re: Short finder

I have the parts you need to buy from ali, I don't have a few parts that need to come from mouser/digikey.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-27-2022, 10:27 PM
Replies: 150
Views: 18,599
Posted By clearchris
Re: New tool to find short capacitors on motherboards : shorty with display

That doesn't sound insurmountable. Couldn't we slap a linear regulator on there and get the current required?
Forum: Troubleshooting Audio Equipment 06-25-2022, 01:59 PM
Replies: 15
Views: 1,829
Posted By clearchris
Re: peavey xr1212

Peavey is a great company when it comes to providing schematics, etc. They will also sell parts if they have them, and they have had some parts to some very old amps I have repaired.
Forum: Troubleshooting Audio Equipment 06-25-2022, 01:56 PM
Replies: 4
Views: 120
Posted By clearchris
Re: 2DIN Android Radio YD7388 amp short in one output

My guess would have been the Y7388 AMP IC also. If you find something else that is damaging the Y7388 and you need to replace it again, there is a better chip that is pin compatible that you might...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-25-2022, 12:11 PM
Replies: 10
Views: 267
Posted By clearchris
Re: For laptop/PC repair what V and A rating should my probes be?

I bought these probes about 2 years ago, and I have been very happy with them. They are pretty commonly available on ali in different kits. I'm just a dabbler, but they have been good to me, and...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-25-2022, 12:05 PM
Replies: 12
Views: 395
Posted By clearchris
Re: Short finder

I have been waiting for this to become available, but I admit, I'm starting to lose faith.

https://www.eevblog.com/forum/testgear/finding-short-on-motherboards-with-a-shorty-(with-display)/
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-31-2022, 02:20 PM
Replies: 1
Views: 386
Posted By clearchris
TS100 Tips - Recommended Vendor?

I have a pinecil on the way
https://www.pine64.org/pinecil/

but it comes with a conical tip. Going to have to replace that with a chisel tip. Anyone have any good ali vendors for ts100 tips?
Forum: Troubleshooting Power Supplies and Power Supply Design 04-11-2022, 11:39 AM
Replies: 26
Views: 12,873
Posted By clearchris
Re: Dell laptop LA90PE0-01 charger repair

I was wondering how long it took you to dig that all out. I took one apart for fun, saw the glue and said nope! If we were lucky, it might be thermoplastic, maybe warming could soften it, but...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-11-2022, 11:34 AM
Replies: 4
Views: 511
Posted By clearchris
Re: Dell Latitude e6510 Boots Once in UEFI

Thank you. I'm going to try this once I'm at a place where I can reboot and be without my computer for a while should things go wrong... I have a spare small partition, I might just throw freedos...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-11-2022, 11:32 AM
Replies: 16
Views: 1,088
Posted By clearchris
Re: Backlight Tester procurement

Don't these leds have pretty similar rated life? Seems like something where you would want to replace them all while you had it out...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-11-2022, 11:27 AM
Replies: 5
Views: 526
Posted By clearchris
Re: BEST BST-863 vs Atten 863D

This looks more exciting to me. stm32 chip that can likely be reprogrammed pretty easily.

https://www.aliexpress.com/item/32859878885.html
Forum: Equipment Usage, Soldering, Techniques, and Reviews 04-11-2022, 11:25 AM
Replies: 5
Views: 526
Posted By clearchris
Re: BEST BST-863 vs Atten 863D

I thought it was a nice touch that it came with a holder that you could point down and reflow chips, but the bottom is solid, so that's not going to work.

The cord looks short, the handle looks...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-06-2022, 11:30 AM
Replies: 4
Views: 511
Posted By clearchris
Re: Dell Latitude e6510 Boots Once in UEFI

Yeah, I was considering that, but was concerned that if I did so, it might just die completely. :)

Do the bios chips get fatigued? Or is corruption more likely? I suspect the last windows update...
Forum: Troubleshooting Laptops, Tablets, and Mobile Devices 04-05-2022, 05:05 PM
Replies: 4
Views: 511
Posted By clearchris
Dell Latitude e6510 Boots Once in UEFI

Ok, really strange problem here. I have a laptop, a dell latitude e6510. When I go into the bios, I can delete all the efi boot options, replace one, and have it boot. When I shut down the laptop,...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-26-2022, 09:21 PM
Replies: 16
Views: 1,120
Posted By clearchris
Re: Desoldering station/gun above ZD-915/474A++ ?

Maybe stretching the spring works if you clean it more often than I do. There's usually a solder ball lodged way up in the narrow part of the spring. It's a pain.

Anyone want to wager a guess...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-26-2022, 12:37 PM
Replies: 17
Views: 1,621
Posted By clearchris
Re: Solder to ... aluminum?

I haven't tried this myself, but I have heard good reports from them.

https://www.harborfreight.com/8-piece-low-temperature-aluminum-welding-rods-44810.html
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-26-2022, 12:22 PM
Replies: 16
Views: 1,120
Posted By clearchris
Re: Desoldering station/gun above ZD-915/474A++ ?

Pretty funny, he must have sucked a lot of solder to melt the tube. It's kind of like a nervous twitch of mine, but I'm always pulling the trigger to make sure that no solder is stuck, I bet it also...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 03-26-2022, 11:50 AM
Replies: 150
Views: 18,599
Posted By clearchris
Re: New tool to find short capacitors on motherboards : shorty with display

I have done some i2c work lately, and if I can't communicate with the chip, the first thing I do is scan for addresses, not to really check for the address, but to verify communication and wiring.
...
Showing results 1 to 25 of 500

 
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