As a trial, I made a simple Point Indicator using inexpensive LED lamps available on eBay which are intended as side clearance lights on trucks, trailers, etc.
As a housing, I 3D-printed a new front panel for a plastic "zippy box" including protruding shades over each LED. For the initial test, the lights change based on the polarity of the 12 V supply to the linear actuator. Despite only drawing about 5 mA from 12 V, the LEDs are quite bright and visible even in bright sunlight.
To provide an indication when approaching the points in the "trailing" direction, I also mounted a single LED indicator in a low-profile box which mounts next to the left hand rail, and below rail height.
The next stage will be to fit limit switches to the point itself to prove that the blades have moved across completely, and not jammed by a stick or piece of ballast.
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| Dimensions of the LED lamps |
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| Points set for the main line |
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| Points set for the siding |
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| A more distant view |
