https://karlquinsland.com/tags/mqtt/Recent content in MQTT on karlHugoen-usSun, 28 Feb 2021 00:00:00 +0000https://karlquinsland.com/poe-stack-light/Sun, 28 Feb 2021 00:00:00 +0000https://karlquinsland.com/poe-stack-light/<figure > <img src="https://karlquinsland.com/poe-stack-light/images/complete/02_all_on.webp" alt="Picture showing assembled light attached to enclosure from the front. All 5 lights are lit." /> <figcaption> <p> The lights are much brighter than they appear in this picture; had to intentionally darken the image to prevent camera from blowing out the colors. </p> </figcaption> </figure> <p><a href="https://en.wikipedia.org/wiki/Stack_light" target="_blank" rel="noopener noreffer ">Stack/signal lights</a> are <em>everywhere</em> in industrial applications for good reason: they&rsquo;re a compact and relatively information-dense indicator system. They always seemed like the kind of indicator that only people with expensive machines needed. Until I found that they can be had for just under $6/light from Ali Express, that is.</p>