update sentiment led link to 8mm led

recipes/README.md

@@ -6,7 +6,7 @@ The recipes are designed to be run on a Raspberry Pi. You can either run one of
 ### [Speech to Text](speech_to_text)
 > Use your voice to control a LED with Watson [[instructables](http://www.instructables.com/id/Use-Your-Voice-to-Control-a-Light-With-Watson/)] [[github](https://github.com/ibmtjbot/tjbot/tree/master/recipes/speech_to_text)]
 
-This module provides a Node.js code to control a [NeoPixel RGB led](https://www.adafruit.com/product/1938) using voice commands. It uses [Watson Speech to Text API](https://www.ibm.com/watson/developercloud/speech-to-text.html).
+This module provides a Node.js code to control a [NeoPixel RGB led](https://www.adafruit.com/products/1734) using voice commands. It uses [Watson Speech to Text API](https://www.ibm.com/watson/developercloud/speech-to-text.html).
 
 [![link to a full video for use voice to control LED](https://img.youtube.com/vi/zfxXvW0HfoA/0.jpg)](https://www.youtube.com/watch?v=zfxXvW0HfoA)
 
@@ -15,7 +15,7 @@ This module provides a Node.js code to control a [NeoPixel RGB led](https://www.
 
 This module provides Node.js code to control the color of a [NeoPixel RGB led](https://www.adafruit.com/product/1938) based on public perception of a given keyword (e.g. "heart" or "iPhone"). The module connects to Twitter to analyze the public sentiment about the given keyword in real time, and updates the color of the LED to reflect the sentiment. It uses [Watson Tone Analyzer](http://www.ibm.com/watson/developercloud/tone-analyzer.html) and Twitter API.
 
-<img src="../images/sentiment.png" width="50%"> 
+<img src="../images/sentiment.png" width="50%">
 
 ###[Conversation](conversation)
 > Build a talking robot with Watson [[instructables](http://www.instructables.com/id/Build-a-Talking-Robot-With-Watson-and-Raspberry-Pi/)] [[github](https://github.com/ibmtjbot/tjbot/tree/master/recipes/conversation)]
@@ -25,7 +25,7 @@ This module provides Node.js code to get your Raspberry Pi to talk. It uses [Wat
 <img src="../images/conversation.png" width="50%">
 
 ## Featured Recipes
-Check out some [featured TJ Bot recipes](../featured/README.md) created by the community. 
+Check out some [featured TJ Bot recipes](../featured/README.md) created by the community.
 
 ## Contributing Your Own Recipes
 TJ Bot is open source and we'd love to see what you can make with him. If you have created your own recipe, we would love to include it as a [featured recipe](../featured/README.md)! Just submit a pull request for your recipe instructions and code and send a link to a demo video to [email protected] (Vimeo & YouTube preferred). We will review it and if we decide to include it in our repository, you'll be listed as the developer. See [CONTRIBUTING.md](../CONTRIBUTING.md).