Uploaded August 2025 | Updated September 2026, 2 hours ago
CV29 might sound technical, but it’s one of the most important—and surprisingly simple—DCC settings you’ll come across.
If you've ever been unsure about changing CV values on a decoder, you're not alone. It can seem daunting at first, but once you understand CV29, you'll unlock control over key features like direction, speed steps, long addresses and more.
In this video, I’ll explain exactly what CV29 does, why it matters, and how you can change it with confidence. Perfect for beginners—and a useful refresher for experienced modellers too.
Calculator websites:
drupal.tcsdcc.com/CV29Calc
2mm.org.uk/articles/cv29%20calculator.htm
Support the channel by becoming a member or Patron:
youtube.com/channel/UCjSL9gh-CP9cL2grTM4VRCQ/join
patreon.com/LittleWicketRailway
Chapters
00:00 Introduction
00:36 What are CVs?
01:33 Editing CVs
03:35 What does CV29 control?
05:23 Calculating CV29
06:30 Useful tools
07:07 JMRI Demonstration
08:48 Summary
CV29 might sound technical, but it’s one of the most important—and surprisingly simple—DCC settings you’ll come across.
If you've ever been unsure about changing CV values on a decoder, you're not alone. It can seem daunting at first, but once you understand CV29, you'll unlock control over key features like direction, speed steps, long addresses and more.
In this video, I’ll explain exactly what CV29 does, why it matters, and how you can change it with confidence. Perfect for beginners—and a useful refresher for experienced modellers too.
Calculator websites:
drupal.tcsdcc.com/CV29Calc
2mm.org.uk/articles/cv29%20calculator.htm
Support the channel by becoming a member or Patron:
youtube.com/channel/UCjSL9gh-CP9cL2grTM4VRCQ/join
patreon.com/LittleWicketRailway
Chapters
00:00 Introduction
00:36 What are CVs?
01:33 Editing CVs
03:35 What does CV29 control?
05:23 Calculating CV29
06:30 Useful tools
07:07 JMRI Demonstration
08:48 Summary
