Peter,
I have attached a post below that explains everything pretty well. (Thanks
Jason)
Go to <www.Mouser.com>
Type in 1N5306 into the search window (this is a 2.0 ma current regulating
diode)
Under the PDF icon click on the link reading "page 350"
This will show you the catalog page listing these diodes.
Select the part type based on the package style and the current value you want.
I would recommend that you get the package style designated as DO-35 which is an axial lead
component. Some of the other case styles will be extremely difficult to work with. Everyone asks
for a part with an exact value of 1.0 ma or 2.0 ma. If you ask for these, you will pay twice as
much as someone who asks for a value that is slightly over or under this. So, choose a current
limiting value that is .1 or .2 over or under the exact value, to same some money.
1N5283 through 1N5314
Current Regulating Diode
JEDEC DO-35 Case
I really don't know which way to connect these but I don't think it will hurt to connect them
backwards so you can just try each way. (PS even though they call them diodes, they really aren't...)
Dan
-------------------------------------------
* From: * Peter M. Stellas[SMTP:[email protected]]
* Sent: * Thursday, November 23, 2006 12:31:27 PM
* To: * [email protected]
* Subject: * RE: CS>technical question
Thanks Dan,
That is the information that I am seeking and we are almost there. The
output from my transformer is now at 0.400 amps. I will go for the current
regulating diode that you mention, so what value diode must I buy?
Peter
Joined: 31 Dec 1969
Posts: 140
Location: Las Vegas, Nevada
Posted: Mon Mar 20, 2006 6:23 am Post subject:
--------------------------------------------------------------------------------
Hi []
A CURRENT LIMITING DIODE, CLD, also known as a "Current Regulating
Diode" or a "Constant Current Diode" performs quite a unique function.
Similar to a zener diode, which regulates voltage at a particular
current, the CLD limits or regulates current over a wide voltage range.
Available in a wide range of voltage and current ratings, and offered
in a variety of leaded and surface mount package styles, the CLD
provides an alternative to conventional design techniques for
controlling current, especially when reliability and component density
are prime considerations.
Basically, it's a small, cylindrical body about a 1/4" (6mm) long and
about a third that in diameter, with wires coming out each end. You
hook it up in series with your generating cell. They come in sizes
rated from about .22 to 4.7 milliamps and they can handle supply
voltages up to about 100V, I think.
If it's backwards, with respect to the battery polarity, it'll block
current completely. In the other direction, it will allow no more than
a certain amount of current specified by the part's current rating.
On a practical level, you want to have a digital milliamp meter
connected in series so you can see what's going on. If you don't own
one already, they're available cheaply from places like Harbor Freight
Tools, Radio Shack, or many other vendors of electronic equipment.
When you start, the current will be well below the rating of the diode,
until enough silver gets into the water to let more current flow. It
will slowly climb and, after a long enough wait, it'll limit at or
close to the diode current limit value.
The diodes are available from Mouser Electronics:
http://www.mouser.com
If you type the three terms "curr reg diodes" into their site search
box, it will bring up a listing of all that are available.
Unfortunately, more sensible terms like "current regulator diodes"
don't work!
( - Thanks Mike G. for the great text explanation )
[]
Best Regards,
_________________
~ Jason
http://www.silvermedicine.org/
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