THE BIT TO REMEMBER
DC controls the track supply. DCC sends commands to a decoder in the locomotive.
What you already have may be enough
If your DC railway does what you want, you do not have to convert it. DCC becomes useful when you want independent locomotive control and supported lighting or sound functions.
What changes with DCC?
A command station sends digital instructions through the rails. A decoder receives them inside each locomotive. You select an address on the controller, then change speed, direction or functions.
Sound is a separate choice
A motor decoder does not necessarily play sounds. A sound installation needs sound-capable hardware, a compatible speaker and the appropriate sounds for your model.
A REAL-WORLD EXAMPLE
With DCC, you can leave one locomotive waiting at a platform while another moves on the same powered track. Select the second locomotive’s address to control it.
Your next step
- Find the name of your current controller.
- Check whether each model is DC, DCC Ready or DCC Fitted.
- Decide what you want to do that your current setup cannot.
Read the original instructions
Reviewed 7 October 2026. These beginner notes do not replace the instructions for your exact model.
NMRA · beginner introduction ↗Hornby · DCC introduction ↗