HOW TO BUILD YOUR OWN RC LOCO KIT: A GUIDE

BATTERY LOCOS (DCC)

Battery DC Guide
Live Steam Guide
Battery DCC Guide
Diagram of an AAA battery pack with 10 
			cells. Number One wiring loom with
charging socket and mini toggle switch. The Cobra high frequency electronic speed controller, next to a coin for 
			scale. JST Motor plug wire and sleeves.

Battery

Switch Loom

Speed Controller

Motor Connection

The Rx4 receiver, connected with a 
			cable to the DCC interface module. DCC Sound

Receiver And DCC

Sound

OMNI-4.1. The twelve-function Tx-4.1 hand-size 2.4GHz transmitter, 
			with two knobs on the front, four buttons on the top, and two buttons on the side.

Transmitter

Battery

Voltage: Choose the voltage to suit your motor. For example, if your motor is a 12V efficient/coreless motor, choose a 12V battery pack, or, for a standard motor, choose a 14.4V battery pack. If your motor is a 6V standard motor, choose a 7.2V battery pack.

Cell Size: We sell battery packs made from AAA, AA, and Sub-C cells.

Cell Configuration: We can create custom battery packs of any configuration for you, depending on the size and shape of your loco.

All the battery packs we supply come fitted with a fast blow fuse as standard.


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Switch Loom

Fosworks supplies a choice of three standard switch looms, each including a switch and a charging socket. The only difference is the type of switch used in the loom. The types available are a mini toggle switch (PNP-110), a sub mini toggle switch (PNP-120), and a slide switch (PNP-100). Choose the type of switch you prefer to use.

We strongly recommend that you use a switch loom in your loco, as this makes it much easier to charge the battery without causing undue wear and tear and unreliability of the battery connector.

Should you wish to operate the loco on track power DCC in addition to the radio, a double pole changeover switch can be fitted. Please speak to us for more details.


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Speed Controller

A speed controller is only needed if the motor power is beyond the capability of the DCC decoder.

If a speed controller is required, the Cobra Speed Controller is an ideal choice for a wide variety of systems. It will cope with motor power up to 30W, which covers most vehicles in Gauge 0, Gauge 1, Gauge 3, and G Scale.

For DCC, choose the basic Cobra model, ESC-160.


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Motor Connection

It may be possible to use the existing wiring within the model to connect to the motor, especially if the model is DCC-ready. You will need the wiring diagram for the loco to ensure that the correct connections are made.

In other cases, a direct connection to the motor can be made, whether from the DCC decoder or speed controller. In this case, the standard choice is the PNP-170 Motor Wire, which has a JST connection at one end, needs to be soldered to your motor at the other end, and is fitted with suppression. We also have available the PNP-400, which ends in a two-way terminal block and may be more suitable for some projects. If you require a special motor wire, such as an extra-long one, please ring and ask us, as we can produce one for you.


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Receiver And DCC

For a battery-powered DCC loco, you will need an Rx4 H receiver, which comes with a DCC module. It is also available with a long aerial (Rx4 H LA), though this is usually only necessary if the receiver is going to be placed inside an enclosed metal box.


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Transmitter

To go with your Rx4 receiver, you will need an OMNI Tx-4.0, or Tx-4.1 transmitter.

The OMNI Tx-4.0 features a single knob to control the regulator, and either six or twelve functions, which are used to control the DCC sound. The Tx-4.0 should only be used where the DCC decoder is driving the motor directly.

The OMNI Tx-4.1 has all the same features as the 4.0, plus an additional knob which applies inertia. This is required if you are using a speed controller in conjunction with the DCC decoder, as it enables you to match the driving characteristics of the model to the sound project on the decoder.


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Sound

With a DCC system, you can use the Legobiffoman DCC sound card, which is a very high quality sound option. The range of suitable Legobiffoman DCC sound cards can be found on the DCKits website. If you are unsure which one is most appropriate for your loco, please contact us, and we will advise.


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