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1  Using Arduino / General Electronics / Re: Basic Electronics Question on: August 26, 2014, 04:09:18 pm
In either case, use a series resitor to limit the current.
Does the LED have separate pins from the switch?

I updated the main post with more information I should have posted earlier. Sorry for the vagueness. It does not have separate leads, I linked to the switch I bought (I actually bought mine from a china site cheaper).
2  Using Arduino / General Electronics / Re: Basic Electronics Question on: August 26, 2014, 04:06:43 pm
...a push button switch which contains an LED.

Are you certain it is an LED?

Lamp rated voltage: 6V

LEDs generally have a "forward voltage" not a "rated voltage".

This isnt exactly the same switch, I bought the same thing from a china site at a better price, but this is the switch.
3  Using Arduino / General Electronics / Re: Basic Electronics Question on: August 26, 2014, 04:05:01 pm

Registry Status: redemptionPeriod

Failed project that I just let die and never updated on here.
4  Using Arduino / General Electronics / Basic Electronics Question on: August 26, 2014, 02:49:04 pm
If you connect the positive lead to the negative lead of a battery we all know the high amps will generate heat and drain the battery too quickly.

I want to power a push button switch which contains an LED. This is a useless button for a cosmetic purpose that I want to just light up when it is pushed as intended. The (-)/(+) will be connected directly to the switch, with the only resistance being the LED inside.

Drill hole diameter: 16mm
Switch rating: 3A / 250VDC
Switch contacts: 1 NO, 1 NC
Material: Chrome plated brass
Grade: IP40/IP67
Contact resistance: < 50 mOhm
Insulation resistance: > 1000 Mohm
Temperature: -20 C to +55 C
Mechanical life: > 500,000
Electrical life: > 50,000
Panel thickness: 1-13mm
Operating pressure: 1.5 - 2.5 N
Operating stroke: 2mm
Lamp rated voltage: 6V

How can I calculate the resistance needed to extend the life of the battery as long as possible while still lighting the LED.

I want to connect a standard 9v battery to this switch, however while the switch is in the on position I want the amp draw to be as low as possible to make sure it lasts long as possible.
5  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.
6  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.
7  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.
8  Using Arduino / Project Guidance / simulation software? on: April 28, 2013, 09:06:00 pm
I have fallen in love with this program here:

However it is extremely limited. I need to experiment with transistors and other components. Can anyone suggest anything?
9  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.
10  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.
11  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.
12  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.
13  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 ( ), they seem to have helped many people who thought that math was impossible to master before.


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.
14  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.
15  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.
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