Garden Railway Forum

To answer the last two posts, in order: A 100 ohm pot getting hot, across the speaker output is a little worrying. - I don't have one of these cards to play with / work out the circuit, so advise caution, until 'we' can find more detail. The second query, is easier to answer : These cards are set up...

Just take a breath, Guys.... These cards are fed with a variable width servo pulse, not a logic '0' or '1', so the 1k or 4k7 resistor is not required. Adding resistors here will not reduce the sound-level. To add a volume control, you could add a 100 ohm pot across the speaker output, and the speake...

I would be a little wary of powering these Soundcards from the MR603 onboard regulator.

I draw your attention to the following extract from the MR603 manual:

"3.3V from the on-board regulator which can supply a max of 200mA"

Phil.P

Thanks for the comments..
More to think about.. I will possibly (weather permitting) be amongst other's with more knowledge on Saturday..

Phil.P

I don't think it was standard, and may be considered as a step too far, in authenticity?

I think I would leave it off.

Phil.P

A Micron supplied MR603c does not have a pin configured for a servo output by default. - It will need programing. A RC Trains supplied MR603c (look for the label, or 'T' hand-written on one of the chips) has a servo output, for external ESC or soundcard, configured on Pin6 in RC Trains configuration...

So did you get the old Anna going once she arrived? These old Beck have brass boilers, something to keep an eye on and drain dry when the locomotive is not in service to prevent the water from drawing the zinc out of the brass. Yes the notch is for a servo rod to go forward to a crank arm mounted i...

Now there is a challenge for the weathering experts!

A little sad, when the custodians of heritage let it rot, but I suppose there is only some much time, money, and man-hours?

Phil.P

Not sure if Andy has any Tx2 left?

I am into single-figures, then it becomes a little more of a job. - The Micron module is a different beast, but the peripherals remain the same.

Phil.P

Rik, You said: Moving the direction switch to the "forward" position should increment the fashing by one flash. So, if it flashes once, clicking the direction switch forward should make it flash twice, clicking it forward again should increase it to three. Is that what you mean by "in...

If you can change the number of flashes for the other options, you should be able to change any of them. - You are sending the same commands.. It could be you have either an older/earlier version receiver, and the firmware is slightly different. Or, There could be a 'feature' in the code in the rece...

3,2,1,1 Would set Pin2 to be a servo output, following Ch1 (throttle). Getting the receiver into programming mode, will be the problem.. Would be less than a minute, with a Tx20. I ought to know where in the country you are, but the brain isn't retrieving the information so well, these days.. We are...

You can prove that Ch4 is driving the soundcard, by setting your Tx22 to control Ch4 from the Inertia pot. - It will be centre-off, so you will need to set it to the mid position.. A programming change (on the receiver) will be needed, to set up P2 to be a servo output following H1 (the speed contro...

Perhaps he is talking through his PPE?


Phil.P

P2/Ch4

I think that is your problem?

The throttle output will be Ch1.
Unless you have a way of driving Ch4, there will not be an output.

I think that what Andy has done, is give you a servo output on P2, which is controlled by Ch4. - Possibly a misunderstanding, between the two of you?

Phil.P

It is at times like this, an aerial shot from a drone, would put the whole kit and caboodle into perspective. An area like that, in our (wet) 'green and pleasant land' would turn into a jungle, in a single season. - I am guessing it is dry enough that the vegetation does not get out of hand easily? ...

Really useful, thank you...

I have not had much luck with model fillers.. Either it was solid when bought (cheap) or used a tiny bit, and the rest went off in the tube..

Had not come across AK modelling filler.. I will have to look out for that one.

Phil.P

Increase the series resistor, and 'weather' the LED..



Phil.P

That must be a 'scale' 5.6mm.

Damn those pesky decimal-places!


Phil.P