https://stream.echo6.co/videos/watch/e1e7c436-e39b-4a3e-b991-e8d084bc2dd9 Such an odd little unit. It works, but has some very odd design choices that left me a bit perplexed. Notably the use of a real UV LED made useless by effectively shunting it with a blue LED in parallel, and then running both at very low current anyway. This design looks like it's a clone of another product made by someone with limited electronic knowledge. I wonder if there's some advantage to using an NPN transistor switching to the positive rail. This video was made in temporary work-supplied accommodation, and the audio may sound different in the first and second parts as I was experimenting with some sound dampening to prevent harsh audio reflections. If you enjoy my videos you can help support the channel with a dollar or two for coffee, cookies and gadgets, and keep it independent from the quirks of the YouTube algorithm by supporting me on Patreon. I release content without adverts for critique and feedback on Patreon as soon as it has been made. https://www.patreon.com/bigclive Alternatively, for a single contribution you can use PayPal:- https://www.paypal.com/paypalme/bigclive #ElectronicsCreators Mon, 13 Apr 2026 18:17:47 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/e1e7c436-e39b-4a3e-b991-e8d084bc2dd9 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.