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| Re: Track Detectors (872214) | |||
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Re: Track Detectors |
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Posted by SelkirkTMO on Sun Dec 13 22:56:28 2009, in response to Re: Track Detectors, posted by Broadway Lion on Sun Dec 13 22:48:51 2009. Most rodents have wheels that the ball turns. On the end of the shafts is a disk with holes in it and the interrupters look like this: If what you have is a reflector type, that'll be a pain in the butt since you'll have to ensure your trains are red or shiny, so you ARE halfway there even if that's the case. With the earlier, more standard type you can probably get a lot more meese on the cheap with that configuration even if you have to slice the optocouplers, and if it's the latter it'll probably work anyway. You can't lose! Only real trick is buying a sufficiently low current relay so you don't have to buy high current transistors to drive it. |
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