adding a led to a circuit

Ok so I understand all about adding a led to a curcit but I want to
know if this would work




Led
I. I
Positive--------I-- I---------switch-------------negitive


Meanwhile the line does not break except at the switch or would I have
to do it different

 

[Zootal]

If I understand your drawing, then nothing would happen. The LED won't light
up unless current flows through it, and your drawing does not show that
happening. Did you mean do draw this?

Led
I. I
Positive-------I I---------switch-------------negitive

In this drawing the LED will light up when the switch is closed. If there
isn't something somewhere to limit the current through the LED, it will
promptly burn up. You need a resistor in series with it to limit the current
to ~15mA.

When do you want the LED to light up? Anytime current flows through the
switch? Anytime there is voltage applied to the circuit?

Ok so I understand all about adding a led to a curcit but I want to
know if this would work




Led
I. I
Positive--------I-- I---------switch-------------negitive


Meanwhile the line does not break except at the switch or would I have
to do it different

 

[JeffM]

jackson.b...@gmail.com wrote:

Ok so I understand all about adding a led to a curcit

You have shown that you know essentially _nothing_ about the subject.

In addition, this is USENET **not** "Google Groups".
For starters, look at the way Google mangled your username
when you used an email address there.
The *smart* thing to do
is to *subscribe* to a newsgroup _before_ posting to it
and give yourself a real username (*without* a domain tacked on).
http://groups.google.com/groups/mysubs

In your case, I also advise the use of a **spellchecker**.
..
..

but I want to know if this would work

Led
I. I
Positive--------I-- I---------switch-------------negitive

To continue with Usenet 101,
most people who read Usenet DON'T see what you see on Google.
Most folks use a newsreader program and will see this:
http://groups.google.com/group/alt.electronics/msg/ef1d8932b5fba465?dmode=source

To post ASCII art to Usenet,
make the drawing using a monospaced font (like Courier)
and cut & paste *that* into your post.
..
..
The LED in your example will likely be destroyed immediately.
To get _useful_ advice, you need to state more information
about what exists in the gizmo you're trying to modify.
**The voltage that is available** would be a starting point.

**The specs of your LED** would also be useful.
Reading a little about LEDs is advised:
http://www.google.com/search?q=cache:jvlLjd4UFC8J:en.wikipedia.org/wiki/LED+gnu+gnu+voltage.drop#Colors_and_materials

Here's another thing you missed
(potentially as catastrophic as not limiting the current drawn).
http://www.google.com/search?q=cache:jvlLjd4UFC8J:en.wikipedia.org/wiki/LED+gnu+gnu+*-*-*-*-*-correct-*-polarity+Unlike-incandescent-light-bulbs#Electrical_polarity

If you are going to be messing with electrical stuff,
you need some basics as well--like **the fundamental arithmetic**:
http://www.google.com/search?q=Ohm's-Law+voltage-divider+voltage-drop

 

[Jasen Betts]

On 2008-12-15, jackson.bran@gmail.com <jackson.bran@gmail.com> wrote:

Ok so I understand all about adding a led to a curcit but I want to
know if this would work

Led
I. I
Positive--------I-- I---------switch-------------negitive


Meanwhile the line does not break except at the switch or would I have
to do it different

you need a resistor somewhere in the line the value of resistor
to use depends on the LED and the voltage.

 

[John Fields]

On Sun, 14 Dec 2008 21:24:22 -0800, "Zootal"
<giganews@zootal.nospam.com> wrote:

If I understand your drawing, then nothing would happen. The LED won't light
up unless current flows through it, and your drawing does not show that
happening. Did you mean do draw this?

Led
I. I
Positive-------I I---------switch-------------negitive

In this drawing the LED will light up when the switch is closed. If there
isn't something somewhere to limit the current through the LED, it will
promptly burn up. You need a resistor in series with it to limit the current
to ~15mA.

When do you want the LED to light up? Anytime current flows through the
switch? Anytime there is voltage applied to the circuit?

---
This is USENET, not email.

Please bottom post or in-line post where appropriate.

JF

 

[Zootal]

I top post so I don't have to scrollllll way down to see what was written.
As many people do. Welcome to the 21st century.

"John Fields" <jfields@austininstruments.com> wrote in message
news:d1nck41h6tls6p7f8v3etf37ku6pun5r5o@4ax.com...

On Sun, 14 Dec 2008 21:24:22 -0800, "Zootal"
giganews@zootal.nospam.com> wrote:

If I understand your drawing, then nothing would happen. The LED won't
light
up unless current flows through it, and your drawing does not show that
happening. Did you mean do draw this?

Led
I. I
Positive-------I I---------switch-------------negitive

In this drawing the LED will light up when the switch is closed. If there
isn't something somewhere to limit the current through the LED, it will
promptly burn up. You need a resistor in series with it to limit the
current
to ~15mA.

When do you want the LED to light up? Anytime current flows through the
switch? Anytime there is voltage applied to the circuit?

---
This is USENET, not email.

Please bottom post or in-line post where appropriate.

JF

 

[Peter Hucker]

The 21st century where you only reply to one point in the message? What happens if you wnat to reply to two sections?

The 21st century where people read from bottom to top? The arabs haven't taken us over yet.


On Mon, 15 Dec 2008 18:15:33 -0000, Zootal <giganews@zootal.nospam.com> wrote:

I top post so I don't have to scrollllll way down to see what was written.
As many people do. Welcome to the 21st century.

"John Fields" <jfields@austininstruments.com> wrote in message
news:d1nck41h6tls6p7f8v3etf37ku6pun5r5o@4ax.com...
On Sun, 14 Dec 2008 21:24:22 -0800, "Zootal"
giganews@zootal.nospam.com> wrote:

If I understand your drawing, then nothing would happen. The LED won't
light
up unless current flows through it, and your drawing does not show that
happening. Did you mean do draw this?

Led
I. I
Positive-------I I---------switch-------------negitive

In this drawing the LED will light up when the switch is closed. If there
isn't something somewhere to limit the current through the LED, it will
promptly burn up. You need a resistor in series with it to limit the
current
to ~15mA.

When do you want the LED to light up? Anytime current flows through the
switch? Anytime there is voltage applied to the circuit?

---
This is USENET, not email.

Please bottom post or in-line post where appropriate.

JF

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

If space is a vacuum, who changes the bags?

 

[John Fields]

On Mon, 15 Dec 2008 10:15:33 -0800, "Zootal"
<giganews@zootal.nospam.com> wrote:

I top post so I don't have to scrollllll way down to see what was written.
As many people do. Welcome to the 21st century.

---
So, on top of being an ignorant whelp you're also netiquette impaired,
lazy, inconsiderate, misinformed, rude, _and_ stupid??

Boy, you're gonna just _love_ it in prison!

JF

 

[Zootal]

"John Fields" <jfields@austininstruments.com> wrote in message
news:2hjdk4lies4ka9up8hdlif5aunp2p3dio1@4ax.com...

On Mon, 15 Dec 2008 10:15:33 -0800, "Zootal"
giganews@zootal.nospam.com> wrote:

I top post so I don't have to scrollllll way down to see what was written.
As many people do. Welcome to the 21st century.

---
So, on top of being an ignorant whelp you're also netiquette impaired,
lazy, inconsiderate, misinformed, rude, _and_ stupid??

Boy, you're gonna just _love_ it in prison!

JF

* Plonk! *

 

[Peter Hucker]

On Mon, 15 Dec 2008 21:47:11 -0000, John Fields <jfields@austininstruments.com> wrote:

On Mon, 15 Dec 2008 10:15:33 -0800, "Zootal"
giganews@zootal.nospam.com> wrote:

I top post so I don't have to scrollllll way down to see what was written.
As many people do. Welcome to the 21st century.

---
So, on top of being an ignorant whelp you're also netiquette impaired,
lazy, inconsiderate, misinformed, rude, _and_ stupid??

Boy, you're gonna just _love_ it in prison!

Is he gonna get arrested for wiring an LED wrongly?

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

Q: Why can't you have a circumcised Morris dancer?
A: Because you have to be a complete prick to be a Morris dancer.