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?
September 24, 2020, 07:35:47 PM
Home Help Search Login Register
News: Please read the Forum Code of Conduct   >>Click Here <<
+  Bachmann Message Board
|-+  Discussion Boards
| |-+  Large
| | |-+  LED and resistors
« previous next »
Pages: [1] Print
Author Topic: LED and resistors  (Read 1751 times)
Dusterdave

View Profile
« on: April 14, 2018, 10:21:51 AM »

Installing Digitraxx Tsunami2 in 3 truck Shay. Soundtraxx calls for 680 ohm resistors on the negative side of all LEDs. Since the Shay already uses LEDs, are they in place on the board or do they, indeed, need to be added?
Logged
Hunt
?
MBB


View Profile
« Reply #1 on: April 14, 2018, 04:18:35 PM »

Install 680 or 1000 Ohm resistor in the negative wire of each LED.

The SoundTraxx TSU-4400 decoder Function Common output  is rated at track voltage minus 1.5V.

Logged
Dusterdave

View Profile
« Reply #2 on: April 15, 2018, 10:03:22 AM »

Thanks again Hunt.
From what I can see, the only LEDs are the front and rear lights. The cab light, firebox and ash pan are 12v and do not need a resistor?
Logged
Hunt
?
MBB


View Profile
« Reply #3 on: April 15, 2018, 12:23:03 PM »

Verify need for resistors and the specs of all lighting used with Bachmann Service Dept.
Logged
rdailey1202

View Profile
« Reply #4 on: May 03, 2018, 03:17:39 PM »

regular 12v lamps do not need them.
Logged
Pages: [1] Print 
« previous next »
Jump to:  
Powered by SMF | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!