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Recent content by LinkZ

  1. L

    [SOLVED] Hall sensor as a normally closed switch

    Thank you, so when the magnet faces the sensor the relay is off?
  2. L

    [SOLVED] Hall sensor as a normally closed switch

    Thank you for the reply. The circuit is not mine, here is the link with a full description: https://www.circuitstoday.com/hall-effect-switch
  3. L

    [SOLVED] Hall sensor as a normally closed switch

    Can someone help me to calculate the R1 resistor?
  4. L

    [SOLVED] Hall sensor as a normally closed switch

    First of all thanks, for the replies. So according to albbg #4 with a NPN this circuit OPENS the relay when magnet faces the hall sensor, which is what i want. Can you please tell me how to properly calculate R1? Can I use 12V from a car to directly power the circuit, or i better use a zener to...
  5. L

    [SOLVED] Hall sensor as a normally closed switch

    I don't understand your question. I need that the hall OPENS the relay when a magnet passes in front of it, the circuit seems to CLOSE the relay when a magnet passes in front of it. Can I obtain the OPENING of the relay when the magnet passes in front of the hall sensor by just changing the Q1...
  6. L

    [SOLVED] Hall sensor as a normally closed switch

    Hi, I need a normally closed switch which is opened when a magnet passes in front of the hall sensor. I found this schematic but as you can see this is a normally open switch. My question is: can I change Q1 with a NPN transistor to make this circuit work as a normally closed switch? And BTW...
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