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@Coalguy posted:

So the reed switch chuff signal to an rs board or cruise commander is ground right? Not 18vac. So if I wanted to use the the rs 2.5 and cruise commander, I could send the chuff (switched ground) to both the boards in parallel?

You don't need chuff to the Cruise Commander unless it's doing something with it.  Also, as I said, I don't believe any K-Line came with RS 2.5, maybe it's time for a picture of what is in your tender.

The K-Line scale Hudson with TMCC came with RS4 plus a two lobe cam for two chuffs and puffs. A Cruise M will give you cruise. 4 chuffs and puffs will require at least a new fan smoke unit and a new chuff generator. GRJ Has a solution. Some others just swap out the cam. John's is easier for most if not as economical.

Pete

We like frugal

Last edited by Norton

You don't need chuff to the Cruise Commander unless it's doing something with it.  Also, as I said, I don't believe any K-Line came with RS 2.5, maybe it's time for a picture of what is in your tender.

Sorry, this is for a MTH Y6b I'm gutting, installing the CC and using the RS2.5 since it has the mallet sounds. Didnt want to waste another thread....

So would I run the Reed switch output to the chuff in on the RS 2.5 board and the CC chuff in?

Or run the reed switch to the RS2,5 board and let serial control the CC control of the smoke unit chuff?

Thanks and sorry for the confusion.

Well, I don't know for sure if the RS 2.5 board requires an isolated chuff switch, I know all the newer boards do require that switch to be totally isolated.  I note that the "AC GND to Hall Effect Sensor" on the RS3 & RS4 boards is not common with frame ground, that seems to indicate they would need to be isolated.  Are you sure the RS2.5 set you have doesn't handle chuff via the serial data?  How do you expect to control the smoke unit chuff with the Cruise Commander? I do chuffs using the Super-Chuffer II as there is no capability to control the smoke fan with the bare Cruise Commander.

Well, I don't know for sure if the RS 2.5 board requires an isolated chuff switch, I know all the newer boards do require that switch to be totally isolated.  I note that the "AC GND to Hall Effect Sensor" on the RS3 & RS4 boards is not common with frame ground, that seems to indicate they would need to be isolated.  Are you sure the RS2.5 set you have doesn't handle chuff via the serial data?  How do you expect to control the smoke unit chuff with the Cruise Commander? I do chuffs using the Super-Chuffer II as there is no capability to control the smoke fan with the bare Cruise Commander.

I forgot we are dealing with unidirectional coms to the tender. So the cruise commander smoke control is useless then? So I still need to buy a super chuffer to get the smoke chuffs and idle smoke? Also will need to change the resistor in the MTH smoke unit too, right?

I'm assuming the serial will tell the RS2.5 board to chuff audio, so a reed switch wouldn't be needed.

Thanks

You have to supply something to manage the chuffs.  There are various schemes around to do so, I was unhappy with all of the ones I saw, so I designed the Super-Chuffer to do that job.  Since a vast majority of TMCC stuff also only did one or two chuffs/rev of the drivers, there was also a need to have something to reliably generate 4-chuffs/rev.  I used to use a reed switch and magnets on the driver, but that was a PITA to position the magnets so they didn't hit the frame and also still triggered the reed switch properly.  So the Chuff-Generator was born and it's the companion to the Super-Chuffer II in my installs.

Click on graphic to expand.

Super-Chuffer II & Chuff Generator Example

As for the RS 2.0 or 2.5 boards, I've been told by someone that's done it multiple times that you can use frame ground reference to the chuff input.  That being the case, you may simply need an extra wire in the tether to bring the chuff back to the tender.  Of course, first find out if the chuff works from the serial data as you don't want both connected, really causes some interesting effects, been there, done that.

@Coalguy posted:

could a single board be made to do it all? Seems kinda crazy to buy all these boards, when it could be integrated into one at probally a lower cost.

I suppose it could if someone were to take up the task of designing it.  Since the Cruise Commander (and AC/DC Commander) already exists, and designing one of those would be significant work, I'm not planning along those lines.  Also, there's the possible patent infringement on the Cruise Commander design.  Given those factors, my only course of action was to create an add-on to do the functions of the Super-Chuffer, which is what I did.  Since the Chuff-Generator mounts on the motor and reads a flywheel strip, I needed a second board there anyway.  I didn't feel it made sense to combine the two functions as many people use the Super-Chuffer without the Chuff-Generator.  Not only would it increase the cost, it would also make the board larger.  Both were undesirable attributes, so here we are.

Note that this is only one solution to managing the smoke unit and some lighting features.  I used to do all of these, or at least the ones I desired for a job, with separate components hand wired.  That's another option if you want to go that way.

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  • Super-Chuffer II & Chuff Generator Example
Last edited by gunrunnerjohn

I use bare LED's and add the appropriate resistors.  For headlights, I use white LED's and a 470 ohm 1/4W resistor.  For marker/class lights, I adjust the resistor value based on the color, red LED's typically need less current for equal brightness to green LED's.  I find it's about 4:1 for typical LED's.

I buy my LED's in quantity on eBay or one of the many parts sites, typically for less than 5 cents each.

@Coalguy posted:

If I use your Super chuffer and chuff gen, what exactly will I need to do to the PS1 fan driven smoke unit?

You just disconnect the two fan leads and run them to the Super-Chuffer.  The TMCC smoke output from the Cruise Commander is run to the power of the PS/1 smoke unit and also to pin-9 of the Super-Chuffer.  It's pretty much the same as any other fan driven smoke unit.

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