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What DIY successes and disasters have you had? (lazysoci.al)
submitted 1 month ago by CheeseToastie@lazysoci.al to c/casualconversation@lemm.ee
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Once tried to paint my front door and fucked it up so badly that a professional had to sand it down. Cost me more than a workman would have done in the first place.

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[-] Hamartiogonic@sopuli.xyz 3 points 1 month ago

Reminds me of that one time I fried some electronics and learned my lesson the hard way.

So, there’s this fancy USB power meter that shows a bunch of data on everything that is going on while charging. Turns out, it doesn’t communicate USB-C PD stuff correctly and can zap some electronics as a result. Here’s how to fry stuff with the wrong voltage.

  1. Plug in a C-C cable between the charger and the power meter.
  2. Plug in another C-C cable between the output side and a phone that can tell the charger to ramp up the voltage. The phone negotiates a higher voltage according to the PD protocol.
  3. Unplugg the phone, but leave all the other cables as they are. Normally, the charger would drop back to 5 V, but now that the power meter is still there, the voltage will stay at 15 V, 20 V or whatever.
  4. Plug in sensitive electronics that can only handle 5 V and watch how the magic smoke escapes.
  5. ???
  6. profit
this post was submitted on 13 Apr 2025
60 points (98.4% liked)

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