Cruise Commander Lite sound question

The CC-Lite has the logic level (0-5V) signal on pin 3 of the RS connector for conventional whistle control.  The full CC does not have that pin active, which is a crying shame!

Thanks! I was hoping that it did.

Email sent with the Cruise Commander Lite Instruction Manual.

Got it! Thank you!

Sorry to hijack this thread but it's close enough I think. I did CC Lite install on a cheapo Lionel that has the horn board that you have to solder to per the manual. I powered the board and ran this line to pin 3. The horn works as expected when the horn button is pushed but it also blows the horn at unprompted times. It seems to have something do to when power is interrupted. Any ideas on how to remedy this issue? Thanks!

The horn at other times is probably the reaction to the track power, it's not uncommon to have them do this without any modification.

I've never looked into it, but there may be a way on those boards to disable the sensing of the track DC offset and prevent it from every affecting the horn board.  Since I like the full sound anyway, using this feature has been very low priority for me.

Is your track and wheels clean?  Random sounds can be symptoms of poor track and engine cleanliness.  G

Thanks for the ideas. The track could probably be cleaner. It seems to trigger around the same point reliably (and some others seemingly random). It's at a switch so I think it's a power interrupt. And once it triggers once it keeps going until I stop the loco. 

Yeah, I can see why it's a low priority. I prefer the full sound kit too, but figured I'd play around with upgrading this one and see if it's a decent one to give to guests for command control running. It was just so boring with no sound I needed at least a horn :-)

Add a 100k resistor in series with the trigger wire.  If the horn won't trigger, try a 51k resistor.

Folks who upgrade to a Full Cruise Commander, simply prefer RS quality.

That's me Jon, I've only tried this feature out once just to see if it works.  I've never bothered with it again, I just use the RS Commander.  Now that they're small, it's easy to fit them in almost anywhere.

I'd actually like to use that pin for a different feature...

Thanks for the ideas.

I put the resistors on the trigger wire (which I think is the single wire that goes from the soldered spot on the back of the board to pin 3 of the sound out on the cclite. The horn triggered both at random and with the remote trigger with both the 100k and 51k ones on there. Without wanting to remove the solder from loads of joints, wanted to check in here first.

Did I put the resistor in the right spot? The power fed to the board is from the cclite cound board (i think pin 1 and 2). Should the resistor be on one of those instead? The horn will trigger at random when the trigger wire is disconnected so it is something to do with the track power (and it could be unclean track, but if there's a way to fix this with electronics I'd like to try that).

Thanks again, appreciate all the help

Jon was pretty clear that the resistor goes in series with the sound trigger on pin 3.  As I said, I have no experience with this option as I only tinkered with it to see if it worked.