Wayne Fugitt wrote:
Evening V,
At 02:12 PM 10/15/2006, you wrote:
Well here is a picture of how this particular three legged diode
looks and a spec sheet for it that explains how to connect it.
http://photoman.bizland.com/diode.jpg
http://photoman.bizland.com/70711.pdf
with 3 leads ( Question and Use )
I could be wrong, but suspect the three legged diodes are actually a
reference to three-terminal current regulators - or possibly to voltage
regulators. These were mentioned a while ago as a method of getting
simple current regulation for CS generator
-list@eskimo.com
Subject: Re: CSDiodes with 3 leads ( Question and Use )
I would not recommend using a constant current diode for that. I would
use the method I am using on my CS to make the current 80 mA. Take a
7805 5 volt regulator and connect a resistor between the output and the
control leads
Thanks Dan, Marshall,
I want to build a couple of LED navigation lights for my sailboat, each
of which may require more than one series string of LED's to cover the
arc uniformly, thus my need for 20, 40, or 80 ma, depending...
Depending on the voltage drop of the LED's used, 3 or 4 per string
two such devices in series to regulate
AC current).
-Original Message-
From: Malcolm Stebbins [mailto:s...@asis.com]
Sent: Saturday, September 30, 2006 10:18 AM
To: silver-list@eskimo.com
Subject: Re: CSDiodes with 3 leads ( Question and Use )
I could be wrong, but suspect
oppose two such
devices in series to regulate AC current).
-Original Message-
From: Malcolm Stebbins [mailto:s...@asis.com]
Sent: Saturday, September 30, 2006 10:18 AM
To: silver-list@eskimo.com
Subject: Re: CSDiodes with 3 leads ( Question and Use )
I could be wrong, but suspect
The legs are already shorted internally, so, it doesn't matter which one
is used. Shorting them externally just makes sure one hits.
Verify with ohmmeter.
That two legs are there, as one, serves the assembly robots as a way to
orient it without having to be able to read.
Ode
At 03:59
That is correct. A current limiting diode is in reality a FET trasistor which
has
the gate shorted to the source, and it is rated according to it's Iss. If you
do
not connect the gate to anything, it will rise in current and be very unstable.
You can actually put a voltage on the gate of the
Interesting, they call the gate, the cathode, never seen that before. Anyway
from the picture of diode.jpg you would connect the
middle lead to the bottom one to make it a constant current diode, and the
anode need to be the positive lead.
Marshall
V wrote:
Hi Wayne,
Well here is a
to connect it up as a constant current
source. You change the value of the resistor to change the current.
Dan
-Original Message-
From: M. G. Devour [mailto:mdev...@eskimo.com]
Sent: Monday, October 16, 2006 6:18 AM
To: silver-list@eskimo.com
Subject: RE: CSDiodes with 3 leads ( Question
I could be wrong, but suspect the three legged diodes are actually a
reference to three-terminal current regulators - or possibly to voltage
regulators.
These were mentioned a while ago as a method of getting simple current
regulation for CS generator applications, and in context with regular
Morning V and The List,
At 05:53 PM 10/14/2006, you wrote:
tere is a spec sheet that comes with theu little diodes that
tells which leads to short together.
I think you and others have used this term, Which Leads to
short together.
It has been a bit confusing to me, raises some
Hi Wayne,
Well here is a picture of how this particular three legged diode looks and a
spec sheet for it that explains how to connect it.
http://photoman.bizland.com/diode.jpg
http://photoman.bizland.com/70711.pdf
Take care,
V
Energize With Light
http://www.theledman.net/
Morning V and
Evening V,
At 02:12 PM 10/15/2006, you wrote:
Well here is a picture of how this particular three legged diode
looks and a spec sheet for it that explains how to connect it.
http://photoman.bizland.com/diode.jpg
http://photoman.bizland.com/70711.pdf
Thanks for the links. I looked
It is a current limiting diode, not just a regular diode. It is used to
limit the current to 1 ma
The third leg can be used to adjust the current I believe. the point of
this diode is to limit current while make CS.
It is used with DC current in my setup so its not a diode for the
purpose of
Guys, it's not that complicated!
Max ordered surface mount componenets by mistake when he was trying to
buy the familiar 2 terminal current regulating diodes in the standard
package that we've talked about here many times over the last several
years...
For some stupid reason these surface
One of the legs is just an anchor and orientation device.
Take a ohm meter and see which ones do what or download the Adobe specs
by googling the part number.
Ode
At 11:13 AM 10/13/2006 -0700, you wrote:
Hey V, or other helpful brethren and sistern, I should have asked about
the 3
Hi Max,
tere is a spec sheet that comes with theu little diodes that tells which
leads to short together. And circuit board with the little copper spots on them
then you can solder to the diode to the copper spots nad then solder the wires
to the copper nearby. if you get the circuit that
Hi Ode,
the spec sheet on mine showed you had to connect two of the legs together.
Take care,
V
One of the legs is just an anchor and orientation device.
Take a ohm meter and see which ones do what or download the Adobe specs
by googling the part number.
Ode
At 11:13 AM
second time around I got those and they are real easy only have two
wires instead
of three also, look like a regular diodes with long leads
What kind of diodes have 3 leads? Never seen one.
I must be living in the dark ages.
Wayne
--
The Silver List is a moderated forum for
Well the ones Max had had three metal legs ( leads) they are made for
surface mounting and you haver to short two of the leads together.
they are a very tiny IC chip smallser than a grain of rice, hard to
solder
V
On Oct 12, 2006, at 11:05 PM, Wayne Fugitt wrote:
second time around
Hey V, or other helpful brethren and sistern, I should have asked about the 3
leads too. Which 2 leads do I have to short together? And as for surface
mounting,; do I get a circuit board at Radio Shack or somesuch to help
wire/mount? How do I know it'll fit, take it with me and try it on?
I
Hi Max
What you need is called a breadboard. They are fairly easy to use once you
understand the concept. See link. I dont know which two leads you short,
might need to experiment. A multimeter would come in handy.
http://www.iguanalabs.com/breadboard.htm
hope this helps?
Sam L.
On 10/13/06,
Max
It'd be a whole lot easier to start again and order a axial lead diode
with 2 wire keads, than to try to sweat a surface mount device onto a
special made circuit board.
Chuck
Why Did Pilgrims' Pants Always Fall Down?
Because They Wore
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