/challenges-projects/project14/opampapalooza/b/blog/posts/led-music-visualizer---blog-1Introduction Hello everyone! Welcome to the first blog of...en-USTelligent Community 12https://community.element14.com/challenges-projects/project14/opampapalooza/b/blog/posts/led-music-visualizer---blog-1Mon, 02 May 2022 12:15:13 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:1bf09295-8412-448c-a093-ec3b29c91d5cbeacon_dave1<p>Nice blog but I think there may be a typo and also a slight error in the band pass filter section ?&nbsp;</p> <blockquote> <p><em>&quot;...The first stage of the BPF is an HPF such that it allows all the frequencies above f1 and the second stage is an <span style="text-decoration:underline;">LFP</span> which blocks all the frequencies <span style="text-decoration:underline;">below</span> f2 such that f2 &gt; f1...&quot;</em></p> </blockquote> <p><span>&#39;LFP&#39; should perhaps be &#39;LPF&#39; ?</span></p> <p><span>The second stage low pass filter would presumably block all the frequencies above f2 and not below it ?</span></p> <p><span></span></p><img src="https://community.element14.com/aggbug?PostID=23317&AppID=365&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/project14/opampapalooza/b/blog/posts/led-music-visualizer---blog-1Tue, 05 Apr 2022 18:15:44 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:1bf09295-8412-448c-a093-ec3b29c91d5cDAB1<p>Nice start.</p><img src="https://community.element14.com/aggbug?PostID=23317&AppID=365&AppType=Weblog&ContentType=0" width="1" height="1">