The quickest and probably best way to do what you want is to use an
switch  on the point motor, in that way you know if the blades
have moved - not just the fact that you have supplied an operating
current, just as the full sized railways do...
 You haven't said what motors you have, but IIRC many either
already have 'switch contacts built in or have then as an accessory -
like the Peco switch unit that fits to the point motor.
Which motors are you using? If it's standard type solenoid
coils then a simple push to make will leave the coil
energised which is not good. Are you using a capacitor
discharge unit or summat like that? Or the push to makes
for route and then an electric pencil?
Otherwise your best bet is to fit a switch to the point so
that you get a definite indication that the blade has moved.
If I recall correctly there are some LED's with built in
resistors in the Maplin and RS catalogues, but I can't
remember what voltages they are suitable for. You need to
limit the current flowing through the LED, calculate it to
match the voltage you choose to supply the LED's with.
Nick Coe (UK)
Available - Will work for money :-)
Jerry's point is well made about the real railways using a switch at the
point to show if they have indeed thrown. But, as nobody's life is in danger
on our models, and as they do throw 99.9% of the time, there is a cheats
Forget using push buttons or whatever. Locate some 4-position multi-pole
(exact number not important) rotary switches, one per point motor. Now, wire
positions 2 and 3 to your solenoid, positions 1 and 4 to your LED's on your
panel through a dropping resistor. The trick is to use positions 2 and 3 as
passing contacts only, in other words, the switch is turned all the way to
either position 1 or 4, and not paused in between. You may have to use an
incentive program to train your operators to do this. I recommend a whip.
:-) A fast recharge capacitor discharge point power supply may also be an
You can use spare poles below positions 2 and 3 to spread the current load
to the solenoids. Also, the knob on the rotary can be used on a track
diagram to show which position it is thrown to, and you are not just relying
on LED's as position indicators.
Newcastle NSW Australia
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