Recent content by GeekGuy

  1. GeekGuy

    Reading 5V on a neutral wire? Hot wire going to ceiling fixture first.

    I'm no master electrician, but I did spend a few years in the trade after high school in the late 90's and early 2000's (so it's been a while). Technically, you're right -- the neutral is the return while the equipment ground is there to shunt fault current to ground to save your life. However...
  2. GeekGuy

    Use Arduino & 2 Switches to Turn LED on and off

    If someone would actually like to see the video and how the switches work with the Arduino, then feel free to message me on here since the link has been removed...
  3. GeekGuy

    Reading 5V on a neutral wire? Hot wire going to ceiling fixture first.

    Lol, ok you got me ;-) What do you mean by N.A. though?
  4. GeekGuy

    Reading 5V on a neutral wire? Hot wire going to ceiling fixture first.

    I'm not sure of the age of your building but in modern homes the neutral and ground are the same. The only circuits that would share a neutral are 3-phase circuits as far as I know, and I doubt you have 3-phase power.
  5. GeekGuy

    Use Arduino & 2 Switches to Turn LED on and off

    Look, I'm truly sorry that I made a bad first impression on some of the moderators 1.5+ years ago. Please give me a chance and let me redeem myself. I promise to only post things that I believe are relevant and helpful, regardless of who created the content. I will not spam or post irrelevant...
  6. GeekGuy

    Use Arduino & 2 Switches to Turn LED on and off

    Steve, I'm not here to cause trouble or upset people. With all due respect, if you look at my recent posts (past year or so) you're the only one that's complained as far as I know. I'm not sure what post was deleted last time; last time I can see something like this happened was almost 1.5...
  7. GeekGuy

    Use Arduino & 2 Switches to Turn LED on and off

    And no, I haven't forgotten. If you look at my recent posts/replies you'll see they contain helpful, relevant links to more info, while others have no links at all, just was trying to be helpful. Some people have even replied and thanked me or liked my posts. I'm sorry that certain unethical...
  8. GeekGuy

    Use Arduino & 2 Switches to Turn LED on and off

    Hi Steve, I'm sorry if I offended anyone here but I fail to see how this is spam. A relevant, helpful post (regardless of who wrote it) should be welcome on a forum like this. Did I put it in the wrong place? What have I done wrong?
  9. GeekGuy

    Use Arduino & 2 Switches to Turn LED on and off

    Hey everyone! I'm kinda new here but thought this may be helpful. I know some of you can do this in your sleep, but a lot of people may find this useful. The concept can be used to control just about anything (motor, relay, LCD, speaker, etc.). (Link removed) What's everyone working on? What...
  10. GeekGuy

    Banana Test Connector

    You could try hardware stores like Lowes or Home Depot. Also, places like Best Buy and places that sell audio and home theater gear may have them. Or you could just go to Amazon.
  11. GeekGuy

    How to use LTspice

    Just for future reference, there are only 2 basic types of thermistors NTC (negative temp coefficient; temp up, resistance down) and PTC (positive temp coefficient; temp up, resistance up) as far as I know.
  12. GeekGuy

    Understanding basic passive components: resistors, capacitors, inductors.

    Glad you enjoyed it @hevans1944. If there's any topic you or the people here think would be helpful let me know and maybe I can do a post on it!
  13. GeekGuy

    Understanding basic passive components: resistors, capacitors, inductors.

    Nice! Resistors seem simple, even to beginners, but can be a lot more complicated than meets the eye. Things like power rating, noise, and temp co may be an issue depending on your application. Here's 7 resistor specs newbies (and everyone else) may need to consider...
  14. GeekGuy

    CO detector engine shutoff

    @Matthew725, I just stumbled on this and I'm not sure if you're still working on this ambitious project or not, but here are some references for OBD-II and the various protocols and codes. https://circuitcrush.com/how-obd-ii-works/ (part 1) https://circuitcrush.com/how-obd-ii-works-part-2/...
  15. GeekGuy

    Multiple grounding points in car infotainment

    Lol, funny!
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