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Does a Laptop Charger Cause Signal Noise and Transmission Issues?

Hello @here how is our day going? I just observed two things just now while using my Oscilloscope and my USB to TTL converter:
When my laptop charger is connected while using the oscilloscope to measure signals, I often see noise on my readings, when i remove the charger, the noise disappers. Has anyone encountered this, and what could be the cause?

Similarly, when my laptop charger is connected and I’m using a USB-to-TTL converter, I occasionally experience data transmission hangs. Has anyone faced this issue, and what solutions worked for you?

I just started experiencing it this morning?

  1. melta101#0000

    yeo,
    i encounter this a lot

  2. melta101#0000

    especially with my macbook

  3. melta101#0000

    most common reason seems to be no earthing on the charger side

  4. melta101#0000

    does your laptop come as a 3 pin or 2 pin?

  5. Afuevu#0000

    Its 2 pin

  6. melta101#0000

    so most probably its the earthing issue

  7. Afuevu#0000

    I see, but i have not experienced this before with the charger before

  8. Afuevu#0000

    Or probably i havent paid attention

  9. Afuevu#0000

    Ok man thanks, I will get the 3 pin plug

  10. melta101#0000

    i have a picoscope and salae logic analyzer
    get noise in both of them on my macbook

    so now a days, i just connect it to a 2nd laptop(one with 3 pin)

  11. Afuevu#0000

    I see

  12. Afuevu#0000

    Thanks man

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