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Signals & Switches & L.C.C. Oh My !
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 Posted: Mon Oct 29th, 2018 08:03 pm
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Steve P
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I am starting to do the computer control/LCC R&D.  
I have concluded that the CAN bus style of control will not work for my outdoor setup.
The RC Circuits power hub only provides 1/2 amp on its power bus, while just ONE of my 3 searchlight poles consumes up to 2 amps!
Since my dead-rail engines require dependable WIFI coverage everywhere along the track, I have decided to use WIFI enabled arduino modules.
They're quite inexpensive and provide a lot of functionality in a small package.

This means my "bus" becomes a 2 wire 5v bus (with a LOT of amps).  
It doesn't have to extend the length of the track, but only exist where controls are needed, ie. depots, freight yards, etc.  
If I can't get 110V to a particular depot, I can park an Optima RedTop battery there for the season.

Hopefully the MKR1010 will provide adequate WIFI coverage with its internal antenna.  
If not I can use a WIFI shield with one of the other arduinos.

I have a 24 channel PWM shield working now, enough control for 4 of the 3 searchlight towers, using only 4 bits of the arduino.  
Its SPI based, and can be daisy-chained, so you could control 4/8/12 or more towers.

They also make an i2c bus based 12 channel PWM servo driver board, which I will be playing with to make tortoise style switch controllers.

Steve P


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 Posted: Fri Nov 9th, 2018 08:20 pm
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Steve P
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Hi, I built a few dwarf prototypes.  I think I'll use ABS plastic for the stands next time.

Attachment: 2018-11-09-130654-1024.jpg (Downloaded 29 times)

Last edited on Fri Nov 9th, 2018 08:21 pm by Steve P

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 Posted: Mon Nov 12th, 2018 06:39 pm
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Steve P
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My latest production prototype of a 3 searchlight pole.  I'm pretty hasppy with it at this point.

Have to rework the electronics, the LM317s I am using can't drive the green/blue segments to full current with a 5v supply.

Steve P

Attachment: 2018-11-12-112306A.jpg (Downloaded 15 times)

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