https://stream.echo6.co/videos/watch/e68dcbe1-d9e5-4ba9-82f9-6eebaed768bb These beacons are commonly mounted on industrial equipment to indicate that a process has finished or a problem has occurred. They are available in 12V, 24V, 36V, and 220VAC versions and a range of colours including red, yellow, green and blue. (The 220V version seems fine on 110V to 240V.) I bought a 12V and 220V unit to compare them, and it turns out they use a common PCB. I'd guess the 24V and 36V units probably use a resistor to limit the current to the 12V Zener. The 220V version is the most versatile since it can be adapted to any voltage and also made into a static light by bridging the transistor that flashes the LEDs. These units are very low power at less than one watt. The keywords to find these are:- "industrial warning beacon" There are different types, and the typical price is around $6 plus shipping. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty. Wed, 15 Apr 2026 13:58:40 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/e68dcbe1-d9e5-4ba9-82f9-6eebaed768bb 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.