I built a voice-activated switch to toggle the lights in my bedroom: <a href="http:&#x2F;&#x2F;arunpn.com&#x2F;projects&#x2F;voice-activated-light-switch&#x2F;" rel="nofollow">http:&#x2F;&#x2F;arunpn.com&#x2F;projects&#x2F;voice-activated-light-switch&#x2F;</a>. More than the project itself, I am happy that I got into the habit of working on side-projects regularly. Now I have a couple of projects going on to keep me entertained.