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Model Railway Electrics - Arm Signals



How to Motorise a Hornby Arm Signal (untested)

 

Light signals are easy to change even when out of arms reach with just a flick of a switch, but how do you change arm signals that you cat reach. Hornby no longer produce a point motor that can control Hornby arm signals but there is a way of using a new point motor to take its place. The diagram below illustrates how this is done with a Hornby single arm signal (R171 or R172).

How to Motorise a Hornby Arm Signal

 How to Motorise a Hornby Arm Signal

Position a point motor under the base board inline with the signals control arm (See diagram). If you don’t want or can’t position the point motor below the board you could use a point motor housing or hide the point motor in a building.

 

Take a short length of metal wire and make a little hook at one end by bending it with pliers. This should then fit into the hole at the bottom of the signals arm. Glue / Solder / Stick the other end to the point motors arm which should be sticking out above the board. If you are using a point motor housing you may want to bend the other end over with pliers and fit it into the hole in the housings moveable arm. You will need to cut the wire to length after you have done any bending and checked its length.

 

And there you go a motorised signal (hopefully).

 

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Model Railway Electrics - Power Clip - This page includes how to fit a hornby power clip, and where to put your power clip or power track. Model Railway Electronics - Train Controllers (AC,DC,DCC,PWD) What's the difference Model Railway Electrics - DC Controller - This page describes what dc control is. Its advantages and dis-advantages. R965 and C990 Model Railway Electrics - DCC Control - Digital Command Control (DCC) Model Railway Electrics - Infra-Red Control - (IRC) Infrared Model Railway Electrics - Point Motors Model Railway Electrics - Switches -  switches include  SPDT, DPDT, on-on, on-off, on-off-on, (on)off(on), Toggle switches, slide switches, and push to make switche. Switches can be used to operate model railway signals, model railway point motors, model railway turntable, Model railway Lights, isolating sections, etc Model Railway Electronics - Lights - This page include LED's L.E.D.'s,  filiment lamps and Bi pin lamp. This page discusses their power consumption heat and suitability for common uses. Model Railway Electrics - Arm Signal - How to Automate an Arm Signal R171 & R172 Model Railway Electris - Light Signals - Signal wire diagrams, How do real light signals work? Hornby, Gaugemaster, Build your own Signal - R406 Model Railway Electrics - Build Your Own Railway Signal, This page discusses how you can build your own cheap model railway signal Model Railway Electrics - How to build a working railway crossing Model Railway Electrics - How to build your own street lights Model Railway Electrics - Hornby turntable - Circuit diagram, Wiring diagram, video Model Railway Electrics - Isolating Circuit - What are isolating sections for, Circuit diagram, Build your own isolating section, How to wire isolating sections. Model Railway Electrics - Control Box - How to build a model railway control box to control your signals, points and other model railway electronics.

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