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Radio Control Goes STEAMPUNK ! - Part II
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 Posted: Mon Apr 8th, 2013 08:45 pm
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Toeffelholm
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Next steps

The DelTang Rx60 and Rx61 receivers provide the dedicated selection of up to 12 locos with a appropriated multi position switch in your Tx.
For this you convert the switch in a kind of potentiometer, but with fixed resistor values. On Davids website you find schematic examples (pdf) e.g. for a 6 way switch .

I want to use a common 3 pos toggle switch for the selection of three locos. The switching states of this switch are " on - off -on " and so this kind of switch can not be wired like a "normal" multi position switch, where each position has its own connection.

The wiring diagram for this switch you find here (for 100% throws)

And this is the way my prepared switch looks like. I use channel 2 for loco selection, red wire is the positive side and is connected to Vref = 3.1V again
(lustre terminal in the picture).








A third switch I want to use for the headlights. This is an 2 position switch, for front and rear lamp.






The 3pole plugs I used here are from these header sockets, that can be broken in needed length. Together with the pin header you can also make very small pluggable connector






Everything placed into the case looks like this. Voltage supply comes fron a 3.6 V LiIon battery (non rechargeble, 2.6 Ah) with AA size, so that it fits into a standard AA battery tray.
Perhaps this will be replaced with a Lipo of suitable geometry later on. But this was my quickest find and with a current demand of the wired Tx2 of about 40-50mA this battery will last for quite a while.






More wires, more chaos, so quickly closed the lid.





Juergen


Next, my settings for Tx2[img][/img]

Last edited on Sat Apr 13th, 2013 06:06 pm by Toeffelholm



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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Sat Apr 13th, 2013 07:22 pm
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Toeffelholm
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I have corrected my last post. I had a fallacy in using the simple 3pos toggle switch with the resistor arrangement for multi position switches.

The switching states of this switch are " on - off -on " and so this kind of switch can not be wired like a "normal" multi position switch.

I found a solution to use this switch with a modified resistor arrangement. David continued this Idea and drew a new wiring Diagram for this. Link in the post above.


Juergen



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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Sat Apr 13th, 2013 07:35 pm
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DavidT
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Juergen, master of simple 3-position switches! I had not noticed the blue light before, looks really nice.
dt.

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 Posted: Sat Apr 13th, 2013 10:49 pm
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Bernd
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Juergen,

For some reason I can see the pictures now. Must have been something with the computer.

Nice job on that transmitter. Reminds me I need to finish mine one of these days.

Bernd



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A PESSIMIST sees a dark tunnel
An OPTIMIST sees light at the end of the tunnel
A REALIST sees a freight train
The LOCOMOTIVE ENGINEER sees three idiots standing on the tracks
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 Posted: Sun Apr 21st, 2013 08:41 am
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Toeffelholm
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My settings



If you use Tx2 in mode 1, as default, you may only change trimming of the throttle pot. I do not need the inertia feature so I switched my Tx2 to mode 2, without inertia. Also I wanted to have throw options to 100% for all channels.

This setting procedure for this two settings is activated by connecting the solder pads "pin 8" and "Vref=+3.1V". In addition to this bind switch has to be "off" in case of mode choice and "on" in case of throttle options choice. You can read the detailed instructions for the setting procedure here.


As I want to make more than one Tx2 and for playing around with the setting possibilities, I made a little auxiliary tool with a kind of claw from a 2 pole piece of the pin header and a toggle switch. The bind switch you see on the right inner side of the case.








For throttle I use a pot with center click indication in the middle position. When I switched on loco and transmitter the first time, the motor was buzzing in center position of the throttle knob. That's an indication for that the center click position is not exactly enough at the middle resitor value. In this case you just have to do some trimming of the throttle channel (normally channel1).

Turning the throttle knob a slight way to the left or to the right will make the motor to fall silent. That is the direction you have to keep in mind for the trimming, in my case to the right.


For actvating the trim mode of any channel I need to connect "pin7" at Tx2 to 0V. I soldered a simple plug and switch tool for this as well. The throttle pot is plugged to the channel that has to be trimmed.





After pulling pin7 to 0V with the switch the LED on Tx2 goes off and I turn the poti to the right end position. The LED starts flashing, whereby each flash indicates four steps of the 512 you have in each direction. I wait for about 5-10 flashes, don't remember the exact number now, and then loose connection of pin7 to 0V with the switch. Turning the throttle to center again and switching on the loco gave the wished result. Maybe you don't hit the correct trim at the first time, so you have to give some flashes more or have to go some flashes back in the other direction. Detailed instructions for this again here.


You may also need trimming if you use a servo e.g. for uncoupling.



Juergen

Last edited on Sun Apr 21st, 2013 08:42 am by Toeffelholm



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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Sun Apr 21st, 2013 08:50 am
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DavidT
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Nice. Do I see a slightly non-standard aerial connection?
dt.

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 Posted: Sun Apr 21st, 2013 09:27 pm
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Toeffelholm
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Hi David,

I used a single pole pin header and socket for connecting to the piece of wire going through the brass case. Works good so far.

Juergen



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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Mon Sep 16th, 2013 04:23 am
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Toeffelholm
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Steampunk Transmitter the third.

A DelTang transmitter I have built for my friend KEG.
Brass box is made by a mutual friend of us.

Here I used Davids 12 position switch for loco selection (DelTang Selecta function)





Juergen

Last edited on Mon Sep 16th, 2013 04:28 am by Toeffelholm



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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Mon Sep 16th, 2013 04:56 am
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Si.
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Wonderfull electronics implementation Juergen !

& great tutorial !

If I need to know (& I might, soon) this is where I'll go.

Thanks for sharing your work.

Love the steam-punk look.

I like your friend KEG's models as well.

All the best

Cheers

Si.



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
http://www.slotforum.com/forums/index.php?showtopic=59295&st=0&a
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 Posted: Tue Sep 17th, 2013 06:59 am
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DavidT
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I agree, stunning!
dt.

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