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Train Station Stop Timer

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MR350
                                                                                                                                   
                                                                                                                                    The Kit
Station Stop Timer from 5 sec to 5 minutes
This project adds a Station Stop Timer to your layout. This will allow you to run your
train on a continuous loop with it stopping each time it gets to a station.The basic
principle is to have a section of track inside the station isolated from the power,
and switched ON and OFF by a electronic timer.
 
How to Install the system.
 
 
 
 
 
 
 
 
 
The first thing you need to do is replace either the left or right track fishplates with 'Insulated Fishplates' in positions C1 & C2 to the nearest joint.
Next fit 2 Power Connectors, 1 on the un-insulated side of C1, and one on the insulated side of C1.  If you have fitted insulated fishplates to the left track then connect a wire P1 & P2 to both of the Power Connectors left track contact. The P1 wire goes to the Common connector on the Timer board (Com). The other wire P2 goes to the Normally Closed contact (NC).
Without power on the timer you should now still have power on all parts of the track.
 
The next step is a little trial and error, fitting the 'Reed Sensor'. You want it to cut power to the train at the right point so the train stops with coaches and engine against the platform. There will be a certain amount of over run depending on the speed of the train. Test this by running the train and then pulling out the wire of the Insulated Power connector when you want the train to stop. This should give you a good indication where the sensor should be placed.
 
You need to solder a wire to each of the pins on the Reed Switch, long enough to get back to where you are positioning the timer. Now drill 2 holes  (2mm) between the sleepers at the distance the pins are apart (12mm)
The kit comes with 1 miniature magnet which should be fitted on the under
side of the locomotive. You now need to fit the reed switch to the space
between the sleepers, and check the clearance by running the loco over
the reed switch.
 
The Timer
The next job is to assemble the timer circuit and test it before
connecting it. Please follow the instructions provided with the timer kit.
 
Remember not to fit the 2 push button switches, you will not need them.
You are replacing the 'Start' Switch with the 'Reed Switch'. There are 6 holes for connecting the switch, the 2 larger ones are
locating holes only. The 2 on the left are connected together by the printed circuit board as are the 2 on the right. You need to connect one wire to a left hole and one to the right hole. This is now your start switch. The stop switch is not required in this application.
 
Connect all wires as shown in the drawing below.
 
 
 
 
 
 
 
 
RV1 on the printed circuit board is the timer control trimmer. Turn the trimmer all the way counter clockwise, and then a small amount clockwise, this should give a small OFF delay to check the circuit. Once you have proved the circuit then set the RV1 trimmer to your desired time delay.
 
                            Parts List
                            Timer Kit                                     EM121 (1)
                            Reed Switch                                SW927 (1)
                            Magnet                                       SW932 (1)
                            Track Insulators                          By others (4)
                            Power connectors                      By others (2)
 
NOTE:
1)         By adding our EM134 relay card to the above circuit you can control the electric light signals around the station, with a stop indication on the control panel, see project 'Station Stop Timer & Signals.
2)        By adding our EM135 relay card to the above circuit you can switch OFF both tracks and control the signals around the station, with a stop indication on the control panel, see project 'Station Stop Timer & Signals'
 
 




(All circuits are working at voltages between 9v to 12v)
(Black lines / wires are Negative, Red Lines / wires are Positive Voltage)