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 Robotics / 15563
    Lego Mindstorms Controlled Train Crossing (Duel Track) —Dean Husby
   After 9 months I finally put together the Web Page for my Lego Mindstorms Controlled Train Crossing. I invite you to check it out. (URL) Lego Workshop: (URL) Lego Club: (URL) (23 years ago, 14-Jun-01, to lugnet.robotics, lugnet.trains)
   
        Re: Lego Mindstorms Controlled Train Crossing (Duel Track) —Benjamin Medinets
     (...) controlled crossings in the near future...just haven't got a chance to get any Mindstorm sets... I think my inspiration came from the old classic 12 Volt level crossing with its own motorized lift gates and lights....you can still get this but (...) (23 years ago, 15-Jun-01, to lugnet.robotics, lugnet.trains)
    
         Re: Lego Mindstorms Controlled Train Crossing (Duel Track) —Kevin Wilson
     Benjamin Medinets wrote in message ... (...) Dean's works beautifully, very reliable (ran for an entire show day without the slightest hitch once he had it set up). Kevin ---...--- Craftsman Lego Kits & Custom models: (URL) Lego parts store: (URL) (...) (23 years ago, 15-Jun-01, to lugnet.robotics, lugnet.trains)
   
        Re: Lego Mindstorms Controlled Train Crossing (Duel Track) —Ross Crawford
   (...) similar, but used 4 light sensors, 2 in parallel like this: Crossing -> | | ===...=== <- Track X1 X2| |X3 X4 X2 & X3 are in parallel, when X1 is broken, boom goes down & stays down while either X1, X2 or X3 is broken. Similarly for X4. This (...) (23 years ago, 15-Jun-01, to lugnet.robotics, lugnet.trains)
   
        Re: Lego Mindstorms Controlled Train Crossing (Duel Track) —Steve Baker
   (...) I'm a programmer - and I have an evil mind... The train driver spots a JarJar Binks minifig standing at the crossing and with murderous intent he trundles swiftly past X1, X2 and X3 - and then stops...just far enough along to block X4 - but (...) (23 years ago, 15-Jun-01, to lugnet.robotics)
   
        Re: Lego Mindstorms Controlled Train Crossing (Duel Track) —Dean Husby
   (...) That's what mine does. If any sensor is broken it starts a timer. If no sensors are broken after the timer expires they go up. This worked very well except for very short trains. Hence the plans for a third sensor right near the track to take (...) (23 years ago, 15-Jun-01, to lugnet.robotics)
 

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