Author Topic: What's this please? (Component Advice)  (Read 1211843 times)

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Offline fkfaraz

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Re: What's this please? (Component Advice)
« Reply #1775 on: July 09, 2022, 12:46:09 pm »
Hello mariush thanks again for the reply

so i have an XGECU t56 programmer. i have disoldered the part and put it in it. Select AT24c512b@SOIC 8. Read it. There is seems to be data there.
Now a question
How could i know how much data is stored there. Like where it is written or i have to calculate it myself from the buffer
Thanks
 

Offline mariush

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Re: What's this please? (Component Advice)
« Reply #1776 on: July 09, 2022, 01:21:21 pm »
Open the export using a hexadecimal viewer / editor  or use the viewer of the programmer to see the data

Empty / unused area will usually be full of either 0xFF or 0x00 bytes. 

So for example, if you see random bytes in the first 128 KB range and then everything is FF  bytes, there's a good chance the circuit or whatever used that eeprom reads and writes data only from the first 16 KB

See picture below, where I use HxD  (freeware hex editor / viewer) to open a random binary file ... it shows 16 bytes per line, and on the far left column it shows the offset in the file - the last fully visible line in the picture has offset  0x 0000 0200   or 200 in hexadecimal, which is 512 in decimal ... so if I see only FF or 00 from that point, I could assume only the first 512 bytes are used by the device or that it was actually a 512 byte eeprom chip and not a 64 Kbit (8 KB) chip.
 

Offline oz2cpu

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Re: What's this please? (Component Advice)
« Reply #1777 on: November 10, 2022, 10:23:08 am »
PLEASE HELP WITH HIGH VOLTAGE DIODE TYPE NUMBER

diameter 3mm
length of body 15mm
forward voltage 17V at 10mA
Color codes wide green = cathode
then a red ring
and then maybe a black ring on the black body, it is impossible to photo
but on some of them i feel like i can barely see it, but i am a bit unsure.
i got a very large bag of them, i can ofcourse measure the brake down voltage,
but i prefer to know real data and real type number,
any suggestions ?
more news 0.58pF and 58Meg ohm at zero volts
« Last Edit: November 10, 2022, 04:40:20 pm by oz2cpu »
Radioamateur OZ2CPU, Senior EE at Prevas
EMC RF SMPS SI PCB LAYOUT and all that stuff.
 

Offline DC1MC

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Re: What's this please? (Component Advice)
« Reply #1778 on: November 10, 2022, 02:15:55 pm »
PLEASE HELP WITH HIGH VOLTAGE DIODE TYPE NUMBER

diameter 3mm
length of body 15mm
forward voltage 17V at 10mA
Color codes wide green = cathode
...

Candidate: https://www.hvproducts.de/axial_lead_low_current_high_voltage_diodes
Could be those guys: https://www.hvproducts.de/gfs_series_high_voltage_diodes

or these:
http://hvp.kr/uploaded/category/data_2CL2_HV37_UX_Series_page_8.pdf

cheers,
DC1MC
 
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Offline oz2cpu

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Re: What's this please? (Component Advice)
« Reply #1779 on: November 10, 2022, 04:31:54 pm »
73 DL1MC thanks a lot for your time and help
none of the suggested diodes matches the size of my diode type.
more news i measured 0.58pF and 58Meg ohm at zero volts
« Last Edit: November 10, 2022, 04:57:33 pm by oz2cpu »
Radioamateur OZ2CPU, Senior EE at Prevas
EMC RF SMPS SI PCB LAYOUT and all that stuff.
 

Offline kolbep

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ST BEV C426
« Reply #1780 on: November 26, 2022, 11:07:10 am »
Hi All
Repairing an Industrial PC Powersupply.
This Component has gone short circuit. It is in Parallel with several electrolytic caps, so I presume it is a cap.
I have not tried to power it up without this, as I don't want it to cause any more damage if it is essential.
I have searched on ST, and on google, but cannot find it.

Any suggestions / what it is?



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Offline gamalot

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Re: ST BEV C426
« Reply #1781 on: November 26, 2022, 11:34:36 am »
Hi All
Repairing an Industrial PC Powersupply.
This Component has gone short circuit. It is in Parallel with several electrolytic caps, so I presume it is a cap.
I have not tried to power it up without this, as I don't want it to cause any more damage if it is essential.
I have searched on ST, and on google, but cannot find it.

Any suggestions / what it is?

(Attachment Link)
(Attachment Link)
(Attachment Link)

Looks like SM15T36CA : https://www.st.com/resource/en/datasheet/sm15t36ca.pdf

Offline kolbep

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Re: What's this please? (Component Advice)
« Reply #1782 on: November 26, 2022, 03:56:31 pm »
Thank you.
That looks like what it is. It is starting up without the ESD Protection.
I will order a replacement shortly.

Peter
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Offline saposoft

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Re: What's this please? (Component Advice)
« Reply #1783 on: December 02, 2022, 09:45:52 pm »
Hi all
I have several of these IC, but haven't been able to find any data about it, not even the manufacturer.
Any advice ?
 

Offline DC1MC

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Re: What's this please? (Component Advice)
« Reply #1784 on: December 03, 2022, 08:11:25 am »
@saposoft Is an EPROM for a musical instrument: Kurzweil K1000SE

https://www.wolfteck.com/2020/06/23/kurzweil_k1000se_components/

See U51

Cheers,
DC1MC - your friendly googler  :-DD

« Last Edit: December 03, 2022, 08:34:19 am by DC1MC »
 
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Offline AVGresponding

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Re: What's this please? (Component Advice)
« Reply #1785 on: December 03, 2022, 08:20:28 am »
I recently came into possesion of a batch of TO-3 NPN transistors marked "LDS 2000" with a B or C suffix. They were made in 1987 (NOS), have quite a low gain of 12-14, and the CE breakdown voltage is around 850, and seems survivable, at least for the few times I've tested it.
Anyone familiar with this part, and knows of a datasheet/cross reference to another? My google-fu has proved insufficient to the task, and it's not in my TITS either (update 5).
nuqDaq yuch Dapol?
Addiction count: Agilent-AVO-BlackStar-Brymen-Chauvin Arnoux-Fluke-GenRad-Hameg-HP-Keithley-IsoTech-Mastech-Megger-Metrix-Micronta-Racal-RFL-Siglent-Solartron-Tektronix-Thurlby-Time Electronics-TTi-UniT
 

Offline ju1ce

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Re: What's this please? (Component Advice)
« Reply #1786 on: December 09, 2022, 04:49:17 pm »
Which temperature and humidity sensor is labeled 271R? This is from a Sonoff SNZB-02, I am investigating whether I could hook up an external sensor.
 

Offline Andy Watson

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Re: What's this please? (Component Advice)
« Reply #1787 on: December 09, 2022, 05:18:31 pm »
Try HDC1080 - if it fits, you should be able to read the manufacturer and device ID via the I2C bus.
* hdc1080.pdf (1230.17 kB - downloaded 59 times.)
 
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Offline ju1ce

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Re: What's this please? (Component Advice)
« Reply #1788 on: December 09, 2022, 06:28:56 pm »
Thanks Andy! This is most likely the correct chip, I did find a few entries in Google now that I know the chip name: https://github.com/smartboxchannel/SONOFF-SNZB-02-Temperature-and-humidity-sensor
 

Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1789 on: December 09, 2022, 07:20:19 pm »
Try HDC1080 - if it fits, you should be able to read the manufacturer and device ID via the I2C bus.
(Attachment Link)

Good job!  :-+

Offline Niko2100

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Re: What's this please? (Component Advice)
« Reply #1790 on: December 13, 2022, 02:18:39 pm »
This is the circuit board from a Arccos 10822-A Caddy. It mounts on the handle of a golf club and records stroke data. The PCB diameter is the same as a CR2032 battery. I could not find information on the chips. The markings are "MGC X220 5ROA" and "8214 C3H 068AJ" I think.
 

Offline PA0PBZ

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Re: What's this please? (Component Advice)
« Reply #1791 on: December 13, 2022, 03:47:32 pm »
C3H: LIS3DHTR Accelerometer

If there's nothing else on the board the other one must be some kind of processor but I fail to find it.
« Last Edit: December 13, 2022, 03:56:35 pm by PA0PBZ »
Keyboard error: Press F1 to continue.
 
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Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1792 on: December 13, 2022, 04:27:55 pm »
 
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Offline W3KW

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Re: What's this please? (Component Advice)
« Reply #1793 on: January 10, 2023, 11:20:57 pm »
Nuts! Just seeing this thread. I just posted a request for help identifying this:

1686514-0

It’s in a Harvey Bandmaster TBS-50C and is not on the schematic though it appears original as it has the same rivets used everywhere else in the rig. Measures a dead short and about .0001 Picofarads. Useless. Except for shorting 8K of 5watt resistors. Also, not in the schematic. Aahhhhhhhh! Stop doing that whomever you are. You are driving me crazy. I think think there is one guy out there that buys all the old ham radio gear and sabotages them with random parts and useless mods and then sells them again for fun.

Thanks for the help.

Wes
 

Offline floston.paradise

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Re: What's this please? (Component Advice)
« Reply #1794 on: February 10, 2023, 08:27:22 pm »
Hello
Please tell me what is the correct name for tips similar to 900M, but in which the inner diameter is not 4 mm, but 4.3-4.4 mm?
And what is soldering irons those use it?
 

Offline DC1MC

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Re: What's this please? (Component Advice)
« Reply #1795 on: February 11, 2023, 03:32:48 am »
Hello
Please tell me what is the correct name for tips similar to 900M, but in which the inner diameter is not 4 mm, but 4.3-4.4 mm?
And what is soldering irons those use it?

The are usually known a "Chinese crap" and are used on other Chinese crap that doesn't work well due to lack of thermal contact, because well, every miserable shop in China could produce garbage similar with that:
https://www.ebay.de/itm/403855237067
but the heating element is only done by a couple of companies and the size is standardized. The size difference is most likely due to lack of internal plating.
I know someone who tries to save them by warping the heating element into a thin foil of copper and forcing them, but the results are crap, do it only if you're desperate, otherwise discard.



 

Offline Bud

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Re: What's this please? (Component Advice)
« Reply #1796 on: February 11, 2023, 05:34:23 am »
Nuts! Just seeing this thread. I just posted a request for help identifying this:
Did you measure if it has inductance? Could be an RF choke.
Facebook-free life and Rigol-free shack.
 

Offline Dave Wise

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Re: What's this please? (Component Advice)
« Reply #1797 on: February 11, 2023, 04:52:50 pm »
Replying to post 1793.  The flat part riveted to the chassis is a "Candohm" (canned ohm) wirewound resistor, a construction style that turned out to be notorious for going open-circuit.  (Also for leaking to the chassis but I'd guess that wasn't the case here.)  Some hobbyist reached into his junk box and found two cylinder-and-lug type resistors with the same total resistance and bridged them across the open part which is now a terminal strip :) .  It's a perfectly acceptable repair except sloppily done.
 

Offline d-chord

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Re: What's this please? (Component Advice)
« Reply #1798 on: March 11, 2023, 05:12:22 pm »
I'm trying to figure out where to get either a connector like this or (even better) a cable with the connector already on it.  This connects to an android tablet which is the controller to a Core 9000 massage chair.   I believe that either the cable has a break or the connector is bad because moving it from one side to the to other would cause the tablet to lose power (apparently it doesn't have a battery).  It finally stopped working altogether and here we are.

This is under warranty but the manufacturer's support is absolutely terrible.  It's been months and they still can't get a part, don't call back, etc so I've decided to try to fix it myself against my wife's wishes.  Does anyone know how to find a part number of something equivalent that would let me get this thing working again?  The other end of the cable is a connector with large pins (not a DIN though), so I'm not worried about getting that side connected.

Thanks,

-David
1735976-0
 

Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1799 on: March 11, 2023, 06:37:48 pm »
Having a ruler or other reference in the picture will make it easier to know the size and pitch, to me they look like Hirose DF14 connectors.

https://www.hirose.com/en/product/document?clcode=&productname=&series=DF14&documenttype=Catalog&lang=en&documentid=D31686_en
 
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