Today I tried occupancy detection with a reed switch and a small magnet under the loc. Results seemed OK.
Link to the video.
Although current sensing probably is the most used detection method, I like to try some other methods too before I make up my mind what to use with my near-future layout.
At this moment chances are 80% That I'm going to use an Arduino for S88 sensor feedback, simply because of its low cost. In that case current sensing is not the most easy, because some additional current detection PCB's will be needed, which will also raise cost again. Optical or magnetic detection are easier and more cost efficient.
The drawback is that there will always be a sensor in view, somewhere besides or between the rails. Some will not like the view or will find it non-realistic. To me this is not a big factor though, since I'm not that much of a 'prototypical purist' ... more a 'technical tinkerer'. Both the optical sensor as well s a reed switch (10 x 2 mm) will fit neatly between the rails, not really that much noticeable.
A reed switch needs only 2 wires, while an IR sensor needs 3. So, that might make me turn to the reed switches as train detection method.
Chances are that (many?) forum members also tried these detection methods, or even use them in practice? I'm curious about experiences ... good or bad ... and if there are any tips ... or any pitfalls?