Recent content by UWouldKnow

  1. U

    Do you feel safer with self-driving cars on the road?

    On average people get in a crash about once every 100,000 miles and Google's self driving cars have driven over 3 million miles and that's in the city, I agree that I would trust myself with my life more than a computer but this ideology is going to delay the self driving car movement. We should...
  2. U

    Does anyone understand where electricity comes from?

    "A short circuit will only cause a lot of current to flow _if_ the voltage source can supply it. " I'm confused about that, why would a voltage source not be able to supply enough current, cause 1/0 or 4/0 or even 100000/0 are all equal to infinity, according to ohms law the value of voltage...
  3. U

    Does anyone understand where electricity comes from?

    Interesting points. So what happens in a short circuit? Wouldn't the resistance be near 0 and since current is equal to voltage over resistance shouldn't current be infinity? What limits current from actually being infinity? So technically couldn't a short circuit somehow be a good way to create...
  4. U

    Can anyone tell what's wrong with my circuit?

    Okay I just posted them
  5. U

    Does anyone understand where electricity comes from?

    I know that batteries move electrons therefore creating a current when there is a load. So if a battery is just for moving electrons, where do the electrons come from? Are electrons just in everything and by moving them you create electricity? If that were the case, why did I read somewhere that...
  6. U

    Can anyone tell what's wrong with my circuit?

    Thanks, I'll try that... I think that's what the issue is. What do you mean by wall wart? Is that something that converts the wall power into something suitible for an arduino Sorry I didn't mean to bother, I was just wondering if someone could see any obvious issues right off the bat. I was...
  7. U

    Can anyone tell what's wrong with my circuit?

    I am doing basic tutorials with an arduino but I can't seem to get this circuit to work. I hooked everything up and ran the given code but nothing happens. The relay is supposed to trigger the led's on and off but when I run the code the relay isn't even making any noise
  8. U

    Which is better -- amp ground connected to frame or battery?

    Okay thanks that helps. So just to make sure, you're saying that it is best to connect the ground of the amp to the frame right?
  9. U

    Which is better -- amp ground connected to frame or battery?

    Interesting. Do you think the same thing could happen when the ground is connected through the frame since there's so many other electronics connected to the frame and wires near the frame? Or are you concluding that the safest option is to connect it to the frame/chassis?
  10. U

    Which is better -- amp ground connected to frame or battery?

    So you think if the ground fuse blew the current would still travel through other things?
  11. U

    Which is better -- amp ground connected to frame or battery?

    When you say "main ground wire" are you talking about the ground wire from the amp to the battery?
  12. U

    Which is better -- amp ground connected to frame or battery?

    Interesting. So if you were to fuse the wire that goes from the amp ground to the battery ground would that eliminate the worry? or do you think it would just be safer to ground to the chassis/frame?
  13. U

    Which is better -- amp ground connected to frame or battery?

    Interesting. Okay would you say it would be better to use the frame? Would it be bad at all to go straight back to the battery, because I wanted to do that since I'm running a lot of extra electrical equipment in the interior and I get weird noises when I turn the devices on sometimes
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