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  1. Garypcv

    Ideas ?

    good morning all, I'd like to build some type of indicator that would activate an LED or bulb that tell me when I've lost main power, 120v 60hz. Preferably even for an instant, light to remain on even when power restored. Even a point in right direction to get me started is much appreciated...
  2. Garypcv

    OK Elec meter

    My apologizes for duplicate post in your 'Repair' forum: I'm looking for owners manual / schematic for a OK Electronics 10Hz-200 MHz Frequncy Meter/Counter. Model 510 Thank you.../gary
  3. Garypcv

    Schematic Needed

    Good evening ladies and gentlemen, trying to locate owners manual and/or schematic for a OK Electronics model #510 10Hz-200MHz Frequency Meter/Counter, thanks in advance... gary
  4. Garypcv

    Open door

    I have 2 freezers 1 fridge all uprights....placing a switch (micro, proximity.....etc) on each door in parallel (?) then to a relay to energize a strobe warning me of open door.....is that correct??
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