<p>The LEGO Group removed the power adaptor on RCX bricks included in the Robotics Invention System 1.5 onwards - These are <a href="http://www.peeron.com/inv/sets/9747-1">often referred to as 1.1 or 1.5 bricks</a>.</p>

CC BY-SA 3.0
2014-08-04T21:19:57.890Z
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
CC BY-SA 3.0
2014-08-05T09:29:22.613Z
Hmm, indeed - the [Wikipedia article](http://en.wikipedia.org/wiki/Lego_Mindstorms#RCX) 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
CC BY-SA 3.0
2012-02-08T09:34:34.760Z
2012-02-08T09:34:34.760Z
Zhaph - Ben Duguid
<p>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?</p>

<rcx>
Why does my RCX programmable brick have no power socket?
zaabtoop
# Why does my RCX programmable brick have no power socket?

(Asked by: username_0 on 2012-02-08)

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?

**Tags:** rcx


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## 1 answers

### Answer by username_1 on 2012-02-08. Score: 6 | Accepted answer

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](http://www.peeron.com/inv/sets/9747-1).

> **Comments:**
> **username_2**: 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.  
> **username_1**: Hmm, indeed - the [Wikipedia article](http://en.wikipedia.org/wiki/Lego_Mindstorms#RCX) 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  

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