Recent content by John Brown

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  1. J

    Battery Fire Risks

    Except, as I said previously, they're not chargers, just 5v power supplies.
  2. J

    Battery Fire Risks

    Agreed. My American relations bring USB "chargers" barely bigger than a sugar cube. They claim to work at 240v, but it's hard to imagine they conform to whatever the physical isolation distance between mains and low voltage is. I keep a couple of IKEA 3 output units on hand, and forbid the use...
  3. J

    Post a photo of the last thing you made

    Me too. I call a spade a spade.
  4. J

    Using AI For Inspiration

    Freudian slip?
  5. J

    Simple electronics circuit to keep power bank alive?

    There is stuff on YouTube to do this. I can't find it right now, but Andreas Speiss(sp) and someone calling themselves "Great Scott", if I remember correctly.
  6. J

    Battery Fire Risks

    Surely Apple devices have the actual charging intelligence in the device, the thing you plug in is just a glorified power supply, same as with EV " chargers"? I can see the cheap Chinese knock-off(although I suspect the genuine Apple accessories are from China) catching fire or failing, but the...
  7. J

    Battery Fire Risks

    What chemistry were the button cells? The ones I've seen in keychain torches were not lithium.
  8. J

    Battery Fire Risks

    There must be millions of people charging their phones every day. How often do you read of a phone catching on fire 🔥? My guess is that cheap eScooters and the like are the problem. When I was working, I was happy to design and program charging circuits for nickel based battery packs, but...
  9. J

    Latest thing you have printed / machined / cut

    Is that a KGT500? If so, I'd be interested in the files, please.
  10. J

    Joke Thread 4

    When the music stops, Daphne Oxenford will be here to tell you a story.
  11. J

    Pneumatic toilet flush button.

    Ah! I see!
  12. J

    Pneumatic toilet flush button.

    Yeah. Have you ever met an American? They can't even say the word "toilet" without blushing. That's why they climb to the pinnacle of euphemism with terms such as "restroom".
  13. J

    Pneumatic toilet flush button.

    It flushes perfectly, once you can start it!
  14. J

    Pneumatic toilet flush button.

    I was exaggerating slightly, but she must be around 90.
  15. J

    bandsaw tyres.

    My orange urethane tyres on my Inca have definitely had it, after 12 or 15 years. The top one came off again yesterday. It seems to have lost all elasticity, but recovers slightly after a spell in boiling water. I'd happily try standard rubber tyres, but not at Inca prices, and being an 11"...
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