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  • Users: loicalset
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  1. loicalset

    NEMA spec question - hazardous environments

    Hello, I am looking to design a NEMA 8 enclosure and would like to know if anybody has experience with what exactly the spec means. I can't decipher if it means the electronics enclosure will be filled with oil or if it will be submerged in oil. Oil submersion makes more sense to me, but I...
  2. loicalset

    Need to invert voltage detector behavior

    Greetings, I have a voltage detector IC (Seiko) that outputs an active low (N-ch) as a result of a low voltage state (<5VDC). I also have a voltage regulator (LM2931) that can be turned ON via active low. The problem is that we would like the active low (which represents a low-battery or power...
  3. loicalset

    need UV stabilized, non brittle, clear, scratch resistant plastic

    Hello, I'm looking for a recommendation for a plastic cover for an array of solar cells. The main features that I understand to be important are: a. Scratch resistance (the unit will be used in rugged conditions) b. Non-yellowing c. UV stabilized - to protect the plastic from degrading in...
  4. loicalset

    cascaded N-mosfets

    A quick sanity check, because my brain is turning to mush: Is there any problem with using two cascaded N-MOSFETs as a sort of "AND" logic, low-side cutoff for an LDO regulator? I am planning to cascade them in the ground path of the LDO. There are two conditions (batt voltage good, mode...
  5. loicalset

    555 alternatives (long delay time)

    Hello All, I'm in need of a retriggerable one shot delay. The application is that I will receive a series of external triggers and each time I receive a trigger (5v signal), I will close a low power (12VDC/1A) relay for 1-10 minutes (adjustable) in order to power-on the target equipment. If I...

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