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Electronics Club

Model Railway Level Crossing Lights

A kit for this project is available from RSH Electronics.

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A magnet under the train operates reed switches positioned on the track. The trigger reed switch starts the sequence by switching on the amber light, a few seconds later the two red lights start to flash. When the train has passed the level crossing it operates the cancel reed switch which switches off the lights until the next train arrives.

There is a PCB pattern for this project, but if you don't have facilities to make PCBs you can build this project on stripboard instead. Please see the New Railway Modellers website for a stripboard layout and advice on making model lamps and barriers.

This project uses a 555 monostable circuit to switch on the amber LED for a few seconds. When this switches off it triggers a 555 bistable circuit which switches on a 555 astable circuit to flash the red LEDs.


Parts Required

Level crossing lights

PCB component layout

PCB component layout for model railway level crossing lights

Track connections

Track connections for model railway level crossing lights

Circuit diagram

Circuit diagram for model railway level crossing lights

Circuits: 555 monostable (on left) | 555 bistable (in middle) | 555 astable (on right)

PCB copper track pattern

PCB track pattern model railway level crossing lights

Stripboard layout

If you don't have facilities to make your own PCB you can build this project on stripboard. Please see the New Railway Modellers website for a stripboard layout as well as advice on making model lamps and barriers.


Click here for RSH Electronics A kit for this project is available from RSH Electronics. If you are new to electronics buying a kit is a good way to be sure you have the correct parts for the project.

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© John Hewes 2007, The Electronics Club, www.kpsec.freeuk.com
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