<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>yellowbkpk</author><text>For those thinking that a homebrew version of this may come in the future, you&apos;ve got it backwards. This is a professional version of homebrew. Check out &lt;a href=&quot;http://diydrones.com/&quot; rel=&quot;nofollow&quot;&gt;http://diydrones.com/&lt;/a&gt; as a good starting point, but this design is quite popular for hobbyists and is relatively simple to build. Definitely less than $10k-worth of time and materials.</text><parent_chain></parent_chain></comment><story><title>Personal Surveillance Drones are here.</title><url>http://www.sensefly.com/products/swinglet-cam/</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>makmanalp</author><text>How about these, for $300?&lt;p&gt;&lt;a href=&quot;http://www.parrot.com/usa/&quot; rel=&quot;nofollow&quot;&gt;http://www.parrot.com/usa/&lt;/a&gt;&lt;p&gt;Or if you&apos;re more adventurous, you can chop 4 30 dollar helicopters from amazon, add in an arduino and IMU with xbees, and come up with your homebrew solution, like my friend who I&apos;ve been helping:&lt;p&gt;&lt;a href=&quot;http://www.youtube.com/watch?v=lvZKr47qt-A&quot; rel=&quot;nofollow&quot;&gt;http://www.youtube.com/watch?v=lvZKr47qt-A&lt;/a&gt;
&lt;a href=&quot;http://www.youtube.com/watch?v=dk_uS9clTDY&quot; rel=&quot;nofollow&quot;&gt;http://www.youtube.com/watch?v=dk_uS9clTDY&lt;/a&gt;&lt;p&gt;(These are pre-arduino, pre-IMU. Now it&apos;s hung from the ceiling and is controlled through the computer with an xbox controller. It&apos;s on a PID control right now, but eventually it&apos;ll be swapped out with a kalman filter based system.)</text><parent_chain></parent_chain></comment><story><title>Personal Surveillance Drones are here.</title><url>http://www.sensefly.com/products/swinglet-cam/</url></story>