tri state diode

T

Tuurbo46

Guest
Hi

Whats the foward voltage drop across a tri state LED diode. I know a
coventional LED is 1.2v. Also im currently working in Proteus ISIS
schematic program and i cant find the part in the libary. Is it best
represented by 3 LED's in series.

Cheers Turbo
 
On Thu, 23 Sep 2004 18:49:23 +0100, the renowned "Tuurbo46"
<alex@beale55.fsnet.co.uk> wrote:

Hi

Whats the foward voltage drop across a tri state LED diode. I know a
coventional LED is 1.2v. Also im currently working in Proteus ISIS
schematic program and i cant find the part in the libary. Is it best
represented by 3 LED's in series.

Cheers Turbo
Click to expand...
What exactly is a "tri-state diode"? Do you mean a bipolar dual-color
LED?

AFAIK, no (visible) LEDs have typical voltage drop as low as 1.2V at
reasonable operating currents. More like 1.6 to 3.2V, depending on LED
color, LED type, and operating current.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On Thu, 23 Sep 2004 13:19:30 -0500, the renowned John Fields
<jfields@austininstruments.com> wrote:

On Thu, 23 Sep 2004 18:49:23 +0100, "Tuurbo46"
alex@beale55.fsnet.co.uk> wrote:

Hi

Whats the foward voltage drop across a tri state LED diode. I know a
coventional LED is 1.2v. Also im currently working in Proteus ISIS
schematic program and i cant find the part in the libary. Is it best
represented by 3 LED's in series.

---
Is that a question.

A tri-state LED is two LEDs in the same lamp connected in either
series aiding or series opposition or in parallel opposition:

Series aiding:

+>--[LED>]--+
|
COM>--------+
|
->--[<LED]--+


Series opposed:

+>--[LED>]--+
|
COM>--------+
|
+>--[LED>]--+


Parallel opposed:

+--[LED>]--+
| |
+/->---+--[<LED]--+
|
-/+>--------------+

The voltage drop across each LED will vary, basically, depending on
the color of the light it emits.
Click to expand...

Your first two have 4 possible 'states', if you count 'off'.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
On Thu, 23 Sep 2004 14:02:13 -0500, the renowned John Fields
<jfields@austininstruments.com> wrote:

On Thu, 23 Sep 2004 18:36:50 GMT, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> wrote:


Your first two have 4 possible 'states', if you count 'off'.

---
State 1 = color 1

State 2 = color 2

State 3 = color 1 and color 2. For the series cases, DC will do it.
For the parallel case, polarity reversals faster than the persistence
of vision will.
Click to expand...
How fast does your persistence reverse?

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog
DOTyou.knowwhat> wrote (in <82a6l059c3a900iodjloe209vkt42l0tpd@4ax.com>)
about 'tri state diode', on Thu, 23 Sep 2004:

How fast does your persistence reverse?
Click to expand...
It depends on how loudly she screams. (;-)
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
 
On Thu, 23 Sep 2004 19:33:49 GMT, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Thu, 23 Sep 2004 14:02:13 -0500, the renowned John Fields
jfields@austininstruments.com> wrote:

On Thu, 23 Sep 2004 18:36:50 GMT, Spehro Pefhany
speffSNIP@interlogDOTyou.knowwhat> wrote:


Your first two have 4 possible 'states', if you count 'off'.

---
State 1 = color 1

State 2 = color 2

State 3 = color 1 and color 2. For the series cases, DC will do it.
For the parallel case, polarity reversals faster than the persistence
of vision will.

How fast does your persistence reverse?
Click to expand...

.... polarity reversals faster than vision will be able to follow.

Better?

--
John Fields
 
On Thu, 23 Sep 2004 21:15:51 +0100, John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:

I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog
DOTyou.knowwhat> wrote (in <82a6l059c3a900iodjloe209vkt42l0tpd@4ax.com>)
about 'tri state diode', on Thu, 23 Sep 2004:

How fast does your persistence reverse?

It depends on how loudly she screams. (;-)
Click to expand...
---
Don't get out much (or perhaps _in_ much) any more, do ya?^)

--
John Fields
 
On Thu, 23 Sep 2004 17:57:54 -0500, the renowned John Fields
<jfields@austininstruments.com> wrote:

On Thu, 23 Sep 2004 21:15:51 +0100, John Woodgate
jmw@jmwa.demon.contraspam.yuk> wrote:

I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog
DOTyou.knowwhat> wrote (in <82a6l059c3a900iodjloe209vkt42l0tpd@4ax.com>)
about 'tri state diode', on Thu, 23 Sep 2004:

How fast does your persistence reverse?

It depends on how loudly she screams. (;-)

---
Don't get out much (or perhaps _in_ much) any more, do ya?^)
Click to expand...
<LOL>

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
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