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Thread: 5.25" WP light/sensor/notch

  1. #1
    Join Date
    Sep 2006
    South Florida

    Default 5.25" WP light/sensor/notch

    I have an opportunity to buy a huge stash of NOS 5.25" DS/DD floppies, cheap, but notchless.

    Short of punching them all, can a simple mod be done to a FDD to basically lock the sensor as always not-WP?

    What would I do? Bridge across the photosensor side?

    If so, I would just put a switch there, like I did my Teac Fd-55GFR for the 300rpm+DS/QD switch....

    FYI, I would use this in my CP/M disk imaging system, not a running system. It would basically be to master floppies from images.


  2. #2


    I would imagine that just bridging the phototransistor would do it, if you want to be super-safe, bridge it with an (about) 220 ohm resistor, in case it's got a funny drive circuit. use a switch by all means, but probably not needed if you're sensible.
    "Don't it always seem to go
    That you don't know what you’ve got ‘til it’s gone" (BANG )


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