PSX-AR Manual Rev: P Software Rev: N
21
L. Add On Circuits for the PSX-AR [Continued]
by Don Fiehmann
2)
LED Indication for Layout Map Display:
There are times when you need to know
which way the PSX-AR is set (reversed or normal). Here is a simple circuit that uses an
LED to indicate the polarity setting of the PSX-AR. It only uses three standard parts. If
you have block occupancy detection circuits the resistor value should be high enough
not to trip the detector circuit. The 1 K value is a starter and if you have problems you
can go much higher and still get a good light from the LED. Circuit connects between a
reversing section and the normal trackage.
