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Joined 11 months ago
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Cake day: October 25th, 2023

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  • Don’t forget the thick net cable.

    And I hated base2 network, so fiddy to work with and can be unreliable if a terminator was removed by a prankster or if there’s a faulty network hardware somewhere. BaseT was the best of both reliable and cheap.

    I still remember a trick to remember which is which: hub, switch, and router. A hub is like an intersection with only stop sign. Good for low traffic but high collision risk with high traffic. Switch is like an intersection with traffic light, better for high traffic. And router is like an intersection with police car present to enforce traffic.




  • And a mosfet between Arduino and the fan. Arduino generally tops out at 20mA per pin which is 0.1w. A decent mosfet can handle several amps and can even drive 12v fan from a 5v pin.

    /r/AskElectronics should be a good place to ask for the right kind of mosfet that is able to handle 1A or more (want to have some margin), can be driven by 5v at gate pin and can handle 12v at source and drain pin.


  • tomytronics@alien.topBtoPC ModdingFingerprint Mouse
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    11 months ago

    I’ve taken apart a few old laptops. Most of the fingerprint reader is an entire board and circuitry in a small package with 4 conductor cable to the motherboard. If it is USB, OP could shove a fingerprint scanner inside the mouse but OP would also need to add an USB hub to connect the mouse and fingerprint reader to one cable going to the computer.

    EDIT: disregard below paragraph, I missed the part about wireless. I’ve never seen a wireless fingerprint scanner

    Not hard to do though, it depends on how much space is inside and how careful OP can be for wiring them up and mounting the reader so it can read without making ugly cutout