LEGO® Answers is a question and answer site for LEGO® and building block enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My RCX has no power socket, I don't know why. it seems that all RCX 1.0 over #300000 have no power adapters. My ONLY link is Google pictures. why?

share|improve this question
up vote 5 down vote accepted

The LEGO Group removed the power adaptor on RCX bricks included in the Robotics Invention System 1.5 onwards - These are often referred to as 1.1 or 1.5 bricks.

share|improve this answer
thanks zhaph. that really helps! – zaabtoop Feb 8 '12 at 23:47
Really late, but... I thought the power adapter wasn't removed until the RIS 2.0. And I'm almost certain that there was no RCX 1.1, but rather a 1.0. – HaydenStudios Aug 4 '14 at 21:19
Hmm, indeed - the Wikipedia article now refers to the 1.0s as being without the power adaptor ("In version 2.0 (as well as later 1.0s included in the RIS 1.5), the power adapter jack was removed."). I'll need to check the one I've got at home - it's definitely a 1.5 set and I'm pretty sure it doesn't have a power adaptor and isn't marked 2.0 – Zhaph - Ben Duguid Aug 5 '14 at 9:29

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.