I am into model railroading, specifically Lionel, which is powered by variable AC through a transformer. Typical volatage is 0 to 18V but the transformer is capable of about 24V. Normal running voltage is 6 - 14V.
I want to build a simple driving circuit to alternately flash two red LEDs in a crossbuck to simulate a warning at a railroad/road crossing. The system will be activated by a micro switch through the pressure of a train wheel passing over it. I see several problems that will need to be addressed.
!.) Placement of the micro switch to start flashers before the train actually reaches the crossing.
2.) As the switch will be repeatedly activated by each wheel, how will that affect the flasher? (There could be as many as 60 wheels.)
3.) Cutting off the flasher after a decent delay, after the train has passsed.
4.)Setting/controling an approiate flash rate.
I know that voltage dropping resistors (750 Ω?), and a diode will be need to control current flow for each LED but what about 555 timers to control flashing speed and delay in for stopping the flashing after the train has passed? I have some LEDs, 750Ω resistors and 1N4001 diodes ordered but I don't know what else I will need.
I have a little experience in elctronics, wiring, soldering, etc., but not much experience in theory.
Any help you can give me would be deeply appreiated.
I want to build a simple driving circuit to alternately flash two red LEDs in a crossbuck to simulate a warning at a railroad/road crossing. The system will be activated by a micro switch through the pressure of a train wheel passing over it. I see several problems that will need to be addressed.
!.) Placement of the micro switch to start flashers before the train actually reaches the crossing.
2.) As the switch will be repeatedly activated by each wheel, how will that affect the flasher? (There could be as many as 60 wheels.)
3.) Cutting off the flasher after a decent delay, after the train has passsed.
4.)Setting/controling an approiate flash rate.
I know that voltage dropping resistors (750 Ω?), and a diode will be need to control current flow for each LED but what about 555 timers to control flashing speed and delay in for stopping the flashing after the train has passed? I have some LEDs, 750Ω resistors and 1N4001 diodes ordered but I don't know what else I will need.
I have a little experience in elctronics, wiring, soldering, etc., but not much experience in theory.
Any help you can give me would be deeply appreiated.