See Electronics for Model Railways Book 1!
Realistic level crossing lights that can be expanded to drive sound (K-CS2)
and boom gates (K-CBC1).
The outputs can drive either grain of wheat bulbs or LED's or lamps.
With the two included sensors the unit can span one bidirectional track or
two single direction tracks. This can be vastly improved to cover many more
tracks with the crossing Expansion (K-CE1) kit.
Includes 2 x Mel-12 light sensors, not shown.
Board dimensions: 3.3in x 1.6in.