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Old 12-04-2018, 10:40 AM   #1
collectors
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Default Points led indicators on a panel question

Sorry if this sounds a bit long winded. But I am looking to add a map of my layout & have some led indicators to show what position the points are in possibly using a Block-signal Points Position Indicator PPI4-DC or similar. This unit gives indication for 8 points & comes with 8 duel coloured LED's & i would of assumed 16 LED's, so if the train is going on the main line that LED would be Green & the siding LED red & visa versa when changed over.
Or is it in this situation where i should assume if its green it will be on the main line & if red the train will go up the siding. ?? If there was 16 LED's it would also make it easy to link the track signals.
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Old 12-04-2018, 11:02 AM   #2
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IMHO those things are of limited use as they only indicate that a signal has been sent to the point motor - they do not confirm that the point has actually moved.
But if you use a point motor that incorporates a switch, then the lights change when the point blades move.
Added to that, buying the component leds and resistors will undoubtedly be cheaper and it’s relatively straightforward to build your own control panel to match your track plan.
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Old 12-04-2018, 11:04 AM   #3
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Hi

Most mimic panels using red and green LEDs are designed to show a green for the direction the point is set towards and red for the unset direction. Move the point the other way and they change colour, so red goes to green and green goes to red.

Personally I dislike red and green indications as I find they all become just too much illumination when the panel is viewed. My preference is to only illuminate the LED for the direction the point is set towards.

As Steve says these units only indicate that the switch has moved on the panel not that the actual point motor itself has moved.
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Old 12-04-2018, 11:19 AM   #4
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My own Mimic Panels just how white LED's with the one lite for the way the points are set....small sub panel and 1 of 3 main panels......
Attached Images
File Type: jpg under panel30.jpg (320.7 KB, 48 views)
File Type: jpg main control panel.jpg (178.7 KB, 31 views)
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Old 12-04-2018, 07:00 PM   #5
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If the points are operated by DCC, there's another option.

DCC Concepts produce the Alpha Mimic module, which reads the DCC instructions sent to the points, from the DCC track or accessory bus.
The Mimic module can be installed under or next to the panel itself, from where short runs of wire connect to the LED's.

Not as cheap as just LED's and a load of wire, but the advantage is that you don't need any wires running back from the point motors to the panel. Just a single connection from the relevant bus to the Alpha Mimic module.
I think this would be especially useful if it's a medium to large size layout, saving on lots of wiring.

The downside is as mentioned above, that the indications will only show that the signal to switch a point has been sent. Not that the blades have actually moved successfully.


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Old 12-04-2018, 09:51 PM   #6
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Thanks everyone for your input. Even though i have DCC i will go down the points with switches. The GAUGEMASTER GMC-PM1 has some good prices & look easy to fit. I realise there is some extra wiring, but i can see the point mentioned about knowing if the points have moved or not. Sometimes old school is better.
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Old 12-04-2018, 11:22 PM   #7
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For some things, old school is always better.
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Old 13-04-2018, 09:16 AM   #8
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Quote:
Originally Posted by Tinker View Post
My own Mimic Panels just how white LED's with the one lite for the way the points are set....small sub panel and 1 of 3 main panels......
Hi Tinker, can yo remember the size of LED's you used on your panel?. Thanks
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Old 13-04-2018, 11:46 AM   #9
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Quote:
Originally Posted by collectors View Post
Hi Tinker, can yo remember the size of LED's you used on your panel?. Thanks
5mm off E-bay 50 at a time, Chrome bezels from E-bay....
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Old 13-04-2018, 11:52 AM   #10
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5mm dia LEDs are quite large. It may be worth considering 3mm ones?
Examples... Link 1
Dont forget these will need a series resistor and depending on your LED power supply voltage (often 12v) a 1K (1000 Ohm) will be fine Example.. Link 2
Mounts (from China) Link 3

Basic wiring using Seep PM1 motors....
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File Type: jpg LED indications - Seep PM.jpg (129.9 KB, 22 views)
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