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Author Topic: power distributor  (Read 394 times)

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Offline Nigel Cliffe

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Re: power distributor
« Reply #15 on: September 04, 2019, 01:03:49 PM »
Nick,
According to the instructions you get with the point indicators - and that's what I believe I have followed - for 2 or 3 LEDs on the panel, you do need for wires. See my attached diagrams.


Heathcote's Point Indicator (standard)?   You can do two LEDs with two wires and cross-wire them at the panel, as the module reverses the polarity.
http://www.heathcote-electronics.co.uk/point_indicator.html#POINT-INDICATOR-STANDARD

What's the third LED for? [edit], ah for your crossovers. Have you arranged it so you only get the middle LED when both points a thrown to the crossover?  It looks like you simply throw both points together, so really two LEDs in parallel and one on its own in the middle, so still only two wires needed.


It can be done with one wire per turnout plus two common wires out to all turnouts and the internal wiring on the panel.

The diagrams in the thread appear to show the switching to be either "thrown" or "straight" on any switch.   Assuming the turnout motors move the turnouts reliably, then all that's required is an indication of "thrown" or "not thrown".  ("not thrown" assumed to equal "straight", with the turnout motors assumed reliability). 

It requires a "split power supply" delivering, say 0v, 5v and 10v.  That's easy using 12v DC in, and two LM317 regulators (preassembled they cost about 3 from Ebay or Amazon, twiddle the little screw on them to set the voltages).   

Trace around diagram, and the turnout motor SPDT switch will return either 10v or 0v, resulting on one or the other LED on panel being lit.


Nigel

« Last Edit: September 04, 2019, 01:04:58 PM by Nigel Cliffe »

Offline springwood

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Re: power distributor
« Reply #16 on: September 04, 2019, 03:06:23 PM »
Nigel,
That all looks a bit over-complicated (to me at least!). Just to re-iterate - as per my two sketch diagrams - I use an SPDT toggle switch (momentary/spring loaded) for each individual point or crossing where a push in one direction energises one side of the motor and a push in the other does other solenoid. A push one way will set road ahead (where two LEDS will light when on a cross-over) and the other (when crossing from one line to another), lights the single LED. Just two LEDs used for a single point. I suppose I could have combined the 'returns' from the LEDS and saved one wire but it's too late to worry about that now as I have just wired the last point! Besides, I love wiring!!  :claphappy:

Offline themadhippy

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Re: power distributor
« Reply #17 on: September 04, 2019, 03:14:44 PM »
Quote
It requires a "split power supply" delivering, say 0v, 5v and 10v.  That's easy using 12v DC in, and two LM317 regulators (preassembled they cost about 3 from Ebay or Amazon, twiddle the little screw on them to set the voltages).   
Or just use AC and 2 diodes



Offline bluedepot

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Re: power distributor
« Reply #18 on: September 06, 2019, 02:41:08 PM »
thanks for replies everyone

danny - cheers ive bought one of them so i'll see what its like.


tim

 

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