SPROG III DCC Decoder Programmer


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  • SPROG III DCC Decoder Programmer
  • USB A to USB B cable

The SPROG III DCC Decoder Programmer is the perfect tool for programming and testing DCC locomotives! The SPROG III even has enough power to run a small to medium sized layout, perfect for those who may want to have a small test layout at home or in the office. Simply connect the SPROG III to a 12-18V DC power supply capable of supplying 3A and connect the supplied USB cable to your computer running JMRI Decoder Pro (free download).

Featuring a greater available power output than the SPROG IIv4, the SPROG III could allow up to 10 locomotives to be operated simultaneously on a small to medium sized layout.

The SPROG III is compatible with all major brands of decoder, including sound decoders and has sufficient power to program large scale decoders.

To download the JMRI suite including Decoder Pro please visit the JMRI releases webpage and download the latest production release: https://www.jmri.org/download/index.shtml 

For more information on connecting your SPROG III to your computer and JMRI Decoder Pro, please visit the JMRI SPROG hardware support webpage: https://www.jmri.org/help/en/html/hardware/sprog/SPROG.shtml

Head to the manual downloads section on my website to download a SPROG instruction manual. For specific Windows 7, 8 and 10 driver instructions see the links below.

Windows 10 Driver Instructions: https://www.sprog-dcc.co.uk/downloads/Win-10-iiv3-iiv4-3-Installation-2021-05-30.pdf

Windows 8/8.1 Driver Instructions: https://www.sprog-dcc.co.uk/downloads/Win-8-iiv3-iiv4-3-installation-2022-09-26.pdf

Windows 7 Driver Instructions: https://www.sprog-dcc.co.uk/downloads/Win-7-iiv3-iiv4-3-installation-2021-05-30.pdf

If running MacOS or Linux no drivers are required.

Electrical Specifications:

Booster Output Current: 2.5 Amps
Recommended Input Voltage: 12 – 18V DC Regulated
Maximum Input Voltage: 20V
Output Track Voltage: Determined by power supply

Functionality Specifications:

Separate Programming Track Output: No
Service Mode (Programming Track) Programming: Yes – in programmer mode
Ops Mode (On the Main) Programming: Yes – in command station mode
Recommended Use: Occasional programming, larger layout control

Additional information

Weight 150 kg


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