/challenges-projects/design-challenges/designforacause/b/blog/posts/blowing-whistle-as-controller-bwac-------how-to-catch-the-sound-from-whistle-31. Selection of WhistleThe most important part of the project is the whistle. Unlike BLE, WIFI or other remote control parts, the whistle do no need any power to keep it alive. You may think they are different, but to users, it is the same. Thereforeen-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/designforacause/b/blog/posts/blowing-whistle-as-controller-bwac-------how-to-catch-the-sound-from-whistle-3Tue, 14 Aug 2018 16:47:14 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:4d17ff3a-8cb7-41ab-949c-4fb7802009bdgenebren0<p>Nice update on your design challenge project.&nbsp; It should be handy to playback your whistle as opposed to blowing on it all the time.</p><p>&nbsp;</p><p>Keep up the good work.</p><p>Gene</p><img src="https://community.element14.com/aggbug?PostID=5339&AppID=206&AppType=Weblog&ContentType=0" width="1" height="1">