Recent Posts

1

Repair / Venerable AIM TTI PL303QMD-P needs help - Output trip error

« Last post by Zucca on Today at 03:39:03 am »

Basically the master right part shows the Output trip error and become irresponsive to any button press.
It is a for parts ebay purchase, the price was low and I could not resist.

Still have to try to connect by ETH and see what it is going on by reading the error codes.

Meanwhile I am doing my homework, if somebody knows something about this problem... I would appreciate any help.

Teardown and more analysis will be here soon, stay tuned!

Thanks!

2

Repair / Re: Please help, how can I adjust this transistor?

« Last post by daisizhou on Today at 03:37:34 am »

Ok, I understand.I will wait for the fault to reappear and connect a suitable ground test point

3

Repair / Re: Please help, how can I adjust this transistor?

« Last post by Harry_22 on Today at 03:28:42 am »

Let you repair it first.
I would ask you to successfully complete C18 heat test to prove my Multicap simulation.

4

Projects, Designs, and Technical Stuff / Re: Augmented PCB Debugger (Feedback Requested)

« Last post by ataradov on Today at 03:28:08 am »

Is this ever an issue? In most cases when I'm debugging a PCB, I have stuff in my hands (probes, soldering iron, etc), and holding the phone and messing with the app is the last thing I want to do.

5

Test Equipment / Re: Powerbanks tested with DHO800/900

« Last post by aXit on Today at 03:22:27 am »

What's the UVLO behaviour of the scope for voltages under 11V? 3.66V per cell could be less than 50% capacity used, depending on the exact chemistry.

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Repair / Re: Please help, how can I adjust this transistor?

« Last post by daisizhou on Today at 03:09:19 am »

Ok, I'm going to spend some time looking for a real ground test point.

My original plan was to replace tantalum capacitors with 35V or 50V withstand voltage specifications, not electrolytic capacitors.I understand that tantalum capacitors have special functions.Because these red tantalum capacitors have been in operation for 20-30 years,Isn't replacing them in advance the best option?

Do you mean to just replace the C18 35V 1UF tantalum capacitor with a 35V1UF or 50V1UF tantalum capacitor?Other tantalum capacitors remain in their original state

7

PCB/EDA/CAD / Re: newbie question about library management

« Last post by PythonGuython on Today at 02:58:43 am »

I used ctrl+f and "soic" to find the layout, but I'm not paying you by the hour, so I won't ask you to dig further. Thanks for your thoughts

8

Vintage Computing / Re: Looking for a Driver for S**Di** e270

« Last post by simon christo on Today at 02:56:38 am »

Windows 10, does find it in MSC mode, but it changes from Connected to Disconnected, every Couple of Seconds or so.
I just plugged it in, and sometimes I can access everything normally, other times, it gets into a Non Responsive Cycle.
Why???

Tah, Simon.

9

Manufacturing & Assembly / Re: modern replacement for HP clear tubing (suggest your favorite "cable" sleeve)

« Last post by coppercone2 on Today at 02:54:50 am »

i just said it because its the defacto standard for quality computer parts to put fiberglass silicone braid on it. I think it offers a high degree of abrasion resistance to shitty PC cases and stuff like that

not sure WHAT can happen in a modern PC now that has a 1000W power supply if something malfunctions. maybe there is more to it

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Projects, Designs, and Technical Stuff / Augmented PCB Debugger (Feedback Requested)

« Last post by leymane on Today at 02:51:38 am »

I am currently working on a smartphone app to help locate components on PCBs using visual overlay. This is an improvement over current methods that require the user to manually match the component locator to the board. The primary goal is to help users test and troubleshoot boards faster and easier.

I made a youtube video to demonstrate my concept. Currently looking for feedback on if it would be useful to anyone. Any suggestions for improvements also welcome.

Here is the video: