20 pair of IR sensor LEDs
20 emitters and 20 receivers.
These are generally used if you wish to have your detectors fit between the rails of OO or HO scale track. You can see how to install detectors between the rails of the track here.
20 pair of IR sensor LEDs
20 emitters and 20 receivers.
These are generally used if you wish to have your detectors fit between the rails of OO or HO scale track. You can see how to install detectors between the rails of the track here.