/challenges-projects/project14/b/show-and-tell/posts/audio-transmission-using-led-lightThis project dates back to the last year of my bachelor degree. The professor for the &quot;Electronic laboratory&quot; course decided to give a twist to final examination allowing two options: standard examination or a project contest. Rules were si...en-USTelligent Community 12https://community.element14.com/challenges-projects/project14/b/show-and-tell/posts/audio-transmission-using-led-lightWed, 26 Aug 2026 10:41:31 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c9868127-2bb6-480a-bad5-6223063b5d8fQbit0<p>Fantastic execution! Using an all-analog, 555-based PWM setup to modulate visible light is such a satisfying way to prove out the core principles of optical communication. It&rsquo;s wild to think that this exact concept is the foundation for high-speed LiFi systems today just swapped with microcontrollers and laser diodes. Congrats on taking 1st place in the contest!</p><img src="https://community.element14.com/aggbug?PostID=30081&AppID=491&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/project14/b/show-and-tell/posts/audio-transmission-using-led-lightWed, 26 Aug 2026 08:53:22 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c9868127-2bb6-480a-bad5-6223063b5d8fobones0<p>Nice one there, especially using only analogous components!</p> <p>This reminds me of LiFi which I&#39;m yet to see any large scale usage.</p><img src="https://community.element14.com/aggbug?PostID=30081&AppID=491&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/project14/b/show-and-tell/posts/audio-transmission-using-led-lightWed, 26 Aug 2026 00:32:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c9868127-2bb6-480a-bad5-6223063b5d8fDAB0<p>Not bad.</p> <p>The optical bandwidth should allow for a very good quality audio signal to be exchanged.</p><img src="https://community.element14.com/aggbug?PostID=30081&AppID=491&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/project14/b/show-and-tell/posts/audio-transmission-using-led-lightMon, 24 Aug 2026 15:34:40 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:c9868127-2bb6-480a-bad5-6223063b5d8fJan Cumps1<p>&gt;&nbsp;<span>Unfortunately one bodge wire made it from the breadboard to our pcb, try to spot it!</span></p> <p></p> <p><img src="/resized-image/__size/1280x720/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-c9868127-2bb6-480a-bad5-6223063b5d8f/pastedimage1787585661891v1.png" alt=" " /> ?</p><img src="https://community.element14.com/aggbug?PostID=30081&AppID=491&AppType=Weblog&ContentType=0" width="1" height="1">