What is this IC?

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  1. - 27th December 2024, 04:16 #1
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    Default Re: What is this IC?

    Could it be this one?
    MCP4021 (Low-Cost NVM Digital POT with WiperLock™)
    - Jerson
    (quote wouldn't work, I had to write it manually)


    Yup, you were right. The tray had 4 plastic tracks of ICs with these 4 markings (I had assumed wrong that they were all the same, D'uh):

    402122E - MCP4021 2.1K
    402152E - MCP4021 5.0K
    402113E - MCP4021 10.0K
    402153E - MCP4021 50.0K

    They matched with another tray that had 2 of those ICs along with the DigiKey labels, and they correspond with the 4 package codes for SOIC/MSOP at the bottom of page 51 of the datasheet.
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!
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  2. - 7th January 2025, 23:40 #2
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    Question Re: What is this IC?

    How about this one?

    Looks like a diode. Tried to take pics all around by bending lead, not sure if I got them all.

    Name: Diode a.jpg Views: 768 Size: 47.9 KB

    Name: Diode b.jpg Views: 771 Size: 58.5 KB

    Name: Diode c.jpg Views: 712 Size: 48.8 KB

    Name: Diode d.jpg Views: 708 Size: 26.5 KB

    I used 3x zoom, then cropped as much as possible.

    I don't see anything...
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

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  3. - 8th January 2025, 00:16 #3
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    Default Re: What is this IC?

    Possibly older version of the 1N4148 or 1N914 signal diode. If the body is bulkier, could be ancient germanium diode
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  4. - 8th January 2025, 01:01 #4
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    Default Re: What is this IC?

    Is that glass or clear plastic? It looks like a fuse or a diode.

    Name: Point-Contact-Diode.png Views: 429 Size: 140.6 KB
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  5. - 8th January 2025, 07:59 #5
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    Default Re: What is this IC?

    I bet it is a germanium diode.

    You can confirm it by applying say 10 volts with a 10K resistor and measure the voltage drop on the part pins. If it is around 0.2-0.3 volts the you can be sure for that.

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  6. - 9th January 2025, 00:26 #6
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    Default Re: What is this IC?

    I'm thinking germanium too, but even then, google seems to believe there isn't a standard bar code.

    They look an awful lot like theses guys:

    https://www.ebay.com/itm/125030406073


    I still have to test the voltage.

    (I'm cutting plexi right now)
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!
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  7. - 9th January 2025, 00:39 #7
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    Default Re: What is this IC?

    I had to have a quickie look. Used 2 meters on diode mode and got these readings:

    Name: Diode Aneng DT9205A.jpg Views: 721 Size: 180.1 KB

    Is the top one measuring resistance (339)?


    Name: Diode TES-2712.jpg Views: 727 Size: 142.0 KB

    And is the bottom one measuring voltage (0.282)?
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!
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