Recent content by Michael P C

  1. M

    Using Electromagnet to Detect Steel Door

    6 might have been confusing the way I wrote it out.. the detector IS the electromagnet at the moment, and if not, needs to stay on that side. That variation sounds really interesting! Hopefully I've solve it before having to test my skills on that idea :)
  2. M

    Using Electromagnet to Detect Steel Door

    You know, that might work too. I'll pick one up for a test.
  3. M

    Using Electromagnet to Detect Steel Door

    Interesting!
  4. M

    Using Electromagnet to Detect Steel Door

    I'm using DC only, but I may have an AC version need so it's good to know this solution! Thanks again.
  5. M

    Using Electromagnet to Detect Steel Door

    OK! A new path to explore - and a creative one at that! Thanks for thinking through this with me Jeff.
  6. M

    Using Electromagnet to Detect Steel Door

    How about an inductive proximity sensor? I'm kind of planning on this as a last resort as long as it's not affected by the adjacent field.
  7. M

    Using Electromagnet to Detect Steel Door

    The door is a ferrous alloy and the core is electrical steel. Do you think a capacitive sensor directly adjacent to the electromagnet be affected by the EM's fields?
  8. M

    Using Electromagnet to Detect Steel Door

    Still trying to absorb this solution. Does this require running this loop non stop until a hit is detected? I think I read this as changing my measurement from a voltage change to the time it takes for a voltage change of N amount. Is that right?
  9. M

    Using Electromagnet to Detect Steel Door

    Well, it's primary function is as an electromagnetic catch, but I also need to detect the presence both with the magnet powered on and off. Just trying to use it for both before I use a secondary sensor. What are you suggesting I use an analog output pin for? It does have a couple available.
  10. M

    Using Electromagnet to Detect Steel Door

    Circuit attached. What do you mean by tap? Do you mean a second voltage divider to operate in the EM's on state? And yes, I believe the readings are occurring every 50 milliseconds.
  11. M

    Using Electromagnet to Detect Steel Door

    This is all DC. I can draw up a circuit but it will be a little crude. Give me a few.
  12. M

    Using Electromagnet to Detect Steel Door

    Oh yes, the detector ideally needs to be on the electromagnet side of the equation, hence my trying to use it as the detector. The way it's wire up, I have 12 volts going to the electromagnet, with a line coming off it that goes to an analog IN pin on the Arduino. I have a voltage divider to...
  13. M

    What sparked my passion for tinkering as a business degree holder in management?

    Hi Guys.. Background: Business degree Current position: Management Passion: Tinkering
  14. M

    Using Electromagnet to Detect Steel Door

    I've got a picture of it attached. The battery sitting on top is representative of the door that it's holding.
  15. M

    Using Electromagnet to Detect Steel Door

    Just thinking through this, is there a module available that might sit between the EM and Arduino to amplify resolution?
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