ONLINE
STORE
"ASK THE BACH MAN"
FORUM
PARTS, SERVICE,
& INFORMATION
CATALOGS AND
BROCHURES

Welcome, Guest. Please login or register.
Did you miss your activation email?
April 21, 2019, 09:00:27 AM
Home Help Search Login Register
News: Check out the photo gallery link above or >click here< to see photos of recently announced products!
+  Bachmann Message Board
|-+  Discussion Boards
| |-+  HO
| | |-+  fitting tender light
« previous next »
Pages: [1] Print
Author Topic: fitting tender light  (Read 1550 times)
robert

View Profile
« on: May 05, 2008, 10:07:03 PM »

I have a Bachmann DCC 4-8-4 GS4 Steamer and the light has come out of the small connector at the end of the orange and brown wires in the tender.
It appears to be a LED so which way around should it be refitted. Long leg to the red or to the brown?
Thanks I need an answer PDQ if possible
Robert
Logged
prebres

View Profile
« Reply #1 on: May 05, 2008, 11:11:58 PM »

This isn't an answer per se, but a means to an answer.

Put your meter on the wires, check the voltage. If it's positive, the red probe is the hot wire. If  you get a negative reading, switch them.

Next check out LEDs online, I think the cathode is is short leg, but check. Be sure. Now see whether the hot wire goes to the anode or the cathode.
Logged
Yampa Bob

Y.V.R.R.


View Profile
« Reply #2 on: May 05, 2008, 11:19:46 PM »

The LED should have a flat spot on one side, the wire closest to the flat is the cathode, which goes to the positive lead.  Some may have a dot on the cathode side.

I believe Paul is correct, short pin is cathode.
Bob
« Last Edit: May 05, 2008, 11:22:36 PM by Yampa Bob » Logged

I know what I wrote, I don't need a quote
Rule Number One: It's Our Railroad.  Rule Number Two: Refer to Rule Number One.
Jim Banner

Enjoying electric model railroading since 1950.


View Profile WWW
« Reply #3 on: May 05, 2008, 11:57:01 PM »

The LED should have a flat spot on one side, the wire closest to the flat is the cathode, which goes to the positive lead.
Bob

Yes, the flat spot indicates the cathode of monochromatic diodes.  But no, it does not go to the positive lead.  It goes to the negative lead.  This is exactly the reverse of a battery where the cathode is positive and the anode is negative.
Logged

Growing older is mandatory but growing up is optional.
richG
Guest
« Reply #4 on: May 06, 2008, 12:09:04 AM »

If it does not light in one direction, switch the leads. That is what I do with LEDs if my guess was wrong.

Rich
Logged
Yampa Bob

Y.V.R.R.


View Profile
« Reply #5 on: May 07, 2008, 06:32:33 PM »

Jim is correct, cathode to negative.  Too many years working with solar panels, where bypass diodes are wired cathode to positive.
Bob 
Logged

I know what I wrote, I don't need a quote
Rule Number One: It's Our Railroad.  Rule Number Two: Refer to Rule Number One.
Pages: [1] Print 
« previous next »
Jump to:  
Powered by SMF | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!