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1  General Category / General Discussion / Re: How does audio travel through you? on: May 18, 2013, 09:05:04 pm
I assume the amplifier is build into the computer speakers no? Also if you barely touch the tip of the cable, it still works.
2  General Category / General Discussion / How does audio travel through you? on: May 17, 2013, 11:30:52 pm
You are the best people to ask and so I will ask you.

1. How does an aux cable work? How is sound transmitted over the cable? There doesn't seem to be a (+) and (-), just 1 metal tip

2. Tested myself If my friend holds an AUX cable plugged into the computer, and I hold one connected to a speaker, and we make contact, the sound plays.

Why are we not too resistive? How come adding more people to the chain seems to not diminish the sound (we had about 6 people in a chain).

I tested again with myself (one cable in each hand) standing on a chair to make sure I wasn't grounded, and it still worked.
3  General Category / General Discussion / Re: [Video] Ohms law - My new Youtube series for Arduino on: April 30, 2013, 03:32:16 pm
not really annoying, but it does blend in with your voice quite well

9 volt battery + LED with no resistor? GAH someone is going to do that ...

otherwise good job

smiley-lol well.. it was an example and maybe not the most accurate one. The next video will cover components, where I will actually say what a resistor is.
4  Using Arduino / Project Guidance / simulation software? on: April 28, 2013, 09:06:00 pm
I have fallen in love with this program here: http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc

However it is extremely limited. I need to experiment with transistors and other components. Can anyone suggest anything?
5  General Category / General Discussion / [Video] Ohms law - My new Youtube series for Arduino on: April 28, 2013, 04:30:46 pm
I haven't made a video in almost a year, I am going to try to pick it back up with electronics.
6  Using Arduino / General Electronics / Re: powering multiple leds on: September 26, 2012, 07:23:40 pm
What John said. if you do not Write to the pin a high voltage then the resistor is in place and severely limiting your power.
7  Using Arduino / General Electronics / Re: Organic Glass - What is it for? on: September 26, 2012, 07:19:57 pm
You know, my Arduino put a nice scratch in my computer desk, so I have been using it as a small work bench lol.
8  Using Arduino / General Electronics / Organic Glass - What is it for? on: September 26, 2012, 07:10:15 pm
A kit I bought online with my Arduino Uno (from china, zero support) came with "Organic glass". It's basically a small slab of plexiglass. What would I use this for? Is it just for me to cut and use in a project box, or is there some sort of electrical purpose.
9  General Category / General Discussion / Re: As a currently on-break college student who just discovered arduino.. on: September 26, 2012, 02:28:42 pm
Most that go to four year colleges to learn electronics are in the electrical engineering program working for a BSEE degree, that to the best of my knowledge have at least the same or most likely even a harder math criteria to pass. So if math is really your weak point most any degree in science is going to be difficult to pass I would think. I know here in the US some of the junior (2 year degrees) colleges offer electronic technician type courses that don't have nearly the math requirements that a full BSEE degree requires, but still one would have to have basic skills in algebra and possibly trig to pass?

So I don't where that would leave you, but possibly you could first bite the bullet and try to apply yourself to mastering the math you would need for whatever path you would like to explore. Have you looked at the on-line Kahn math courses offered for free ( http://www.khanacademy.org/ ), they seem to have helped many people who thought that math was impossible to master before.

Lefty
 

I am in the US. Unfortunately I have something going on. Any time I enter a math class I get physically sick and tired. I know how odd that sounds and I swear I am not just saying that. Like I enter math class and I get a runny nose and I can hold my head by my hair and still pass out. My brain just hates math. I took college algebra twice already and can't get myself through the course.
10  General Category / General Discussion / As a currently on-break college student who just discovered arduino.. on: September 26, 2012, 12:45:52 pm
I am wondering if I would be interested in working on electronics in college (honestly I think college is a waste and it doesn't matter what degree you have you just want to have one). I was originally in College for computer science. I am a fine programmer but I am a TERRIBLE math student (you don't know anyone as bad at math as me). So I had to leave computer science. Has anyone gone to college for something in the electronics field? What was your major called? What kind of math classes were involved.. lol.
11  Using Arduino / General Electronics / Re: First time playing with an IR sensor. on: September 26, 2012, 12:40:13 pm
I have a book coming about basics of electronics and arduino.
Maybe I'll slow down a bit until my book arrives.

For those interested Here's the book.
12  Using Arduino / General Electronics / Re: First time playing with an IR sensor. on: September 26, 2012, 12:05:20 pm
my bad just reread your code again I'm using my phone with a cracked screen. Have you looked at the data sheet for the ir receiver

Not that I really know how to read one, I found on in Japanese lol.

I just found this though, though it seems to be getting a different but similar result to me. Every button on the remote just puts the same number in the monitor.
http://www.arcfn.com/2009/08/multi-protocol-infrared-remote-library.html
13  Using Arduino / General Electronics / Re: First time playing with an IR sensor. on: September 26, 2012, 11:51:45 am
Hi there newbie here too.

Just looking through your code

You have data is 0

Then if data is not equal to 125
Then print data.
Take out if statement.

Then use println(ir);
That is what you need to send
Hope tbst helps

Sorry I dont understand. Data is only initialized as "0", that code doesn't actually effect anything. I have the if statement there to filter out the 125s that it gets for just being on. (make it easier to read the log).
Also printing IR would result A0. You need to analog read A0 into memory first, which is why we have data.
14  Using Arduino / General Electronics / First time playing with an IR sensor. on: September 26, 2012, 11:36:11 am
Well Im pretty much attacking this kit I bought lol. I am kind of just plugging things in and hoping it does something honestly. I just shoved a IR sensor (VS1838B) on my board ran the 5v line to it and a 220 ohm resistor (only because I saw someone use that for an LED on a tutorial lol. No clue what I am really doing).

So I am just reading the input. Curiously just being on gives the value 123-127. While holding down any button on the remote I am using you get 13.

I assumed that maybe the sensor becomes more resistant when IR light is present and that 125ish is what ambient light does to it. I decided to take out the resistor to someone test that theory (yes I know that's bad) oddly I still got 125 and 13 on a button press.

So I have more experimenting to do I guess. smiley-razz

Code:
int ir = A0;
int data = 0;

void setup() {
  Serial.begin(9600);
  }
 
void loop() {
  data = analogRead(ir);
  if (data != 125) {
  Serial.println(data);
  }
  else {}
 
  delay(100);
}
15  Using Arduino / General Electronics / Re: Shift registers? Controlling LEDS with one pin? on: September 26, 2012, 10:40:42 am
Fantastic information guys. Thank you so much.
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