I have replaced the original board on my MP15 with a TSU-AT1000 Digital Sound Decoder. The wiring is fine. However I have a problem with the lights-front and back.I thought that wiring would be easy-using the exisiting wiring. The new decorder is working, with sound. However I cannot get the front and back lights to swiitch on and off. I have wired the leds using the advice with in the soundtraxx manual -I have hard wired to the common and numbers 8 and 9 and 2 and 3 on the board. I can see the red light on the decorder changing when I press F0
What Have i done wrong?
http://www.soundtraxx.com/manuals/tsuinstallation.pdf
not positive,but you mite need a resistor inline w/the led ...Jerry
Jerry, I don't think that is the problem. The Soundtraxx web site says that hardware is already on the circuit board to accommodate the use of 1.5 Volt bulbs without the need for external resistors or other electronics.
Gotta be something else.
Rich
Alton Junction
Mike,
It could be a couple of things:
LEDs are diodes so they are "directional"; meaning current can travel through them in one direction ONLY. (Unlike resistors which can pass current in either direction.) The white or yellow wire is soldered to the CATHODE (-) or long lead of the LED; the blue (or common) wire is soldered to the ANODE (+) or short lead of the LED.
Here's a handy diagram for understanding the various parts of an LED, as well as determining which lead is the correct lead to solder your wires to:
Lastly, the resistor can be soldered to either LED lead in order for it to work properly. (For consistency, I like to solder to the ANODE or blue wire.) A 1K Ohm resistor is a good place to start. If it's too dim, move to a smaller resistor value.
A couple more things have come to mind:
Hope that helps, Mike...
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
richhotrain Jerry, I don't think that is the problem. The Soundtraxx web site says that hardware is already on the circuit board to accommodate the use of 1.5 Volt bulbs without the need for external resistors or other electronics. Gotta be something else. Rich
The decoder instructions are very clear, You cannot use LED's on the 1.5 volt connections. Those obviously only for 1.5 volt light bulbs.
LED's are polarity conscious and need a 1k resistor.
A couple Tsunami light board decoders come with LED resistors on the decoder.
If all else fails, follow the directions.
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.
yep thats the way I remember it ,Im glad someone with more knowlege than me chimbed in...thanks ..Jerry
richg1998 If all else fails, follow the directions. Rich
LOL, doesn't that take the fun out of it?
No ,I think it should say "if all else fails read the directions 5 times". on the fifth read is when I can say "clearly states ".. cause for me nothing about DCC directions has been "clear" I'm still worried everytime I hit the ON button ..Jerry
BIG JERR No ,I think it should say "if all else fails read the directions 5 times". on the fifth read is when I can say "clearly states ".. cause for me nothing about DCC directions has been "clear" I'm still worried everytime I hit the ON button ..Jerry
Jerry, I share your pain. I am the same way.
Even on this thread. After checking the Tsunami decoder specs to verify that a resistor was wired into the board for 1.5 volt bulbs, I failed to catch the what the OP first said and that was that he had wired LEDs to the board. All along I am thinking he wired incandescents. LOL