https://benjiao.net/tags/electronics/Recent content in Electronics on benjiao.netHugo -- 0.165.0en-usFri, 14 Aug 2026 02:49:00 +0800https://benjiao.net/posts/catfood-level-sensor/Fri, 14 Aug 2026 02:49:00 +0800https://benjiao.net/posts/catfood-level-sensor/<h1 id="the-problem">The Problem</h1> <p>My <a href="https://www.instagram.com/hello_tsewet/">wife</a> and I take care of <a href="https://instagram.com/kittie.club">40+ rescued cats</a> at home. With this, comes the need to monitory supplies like cat food and litter closely. I thought it would be nice to have a way to automate the process and give us better <em>operational awareness</em>.</p> <a class="post-image" href="https://benjiao.net/posts/catfood-level-sensor/images/catfood-bin_hu_e0ef7535982e803e.webp" target="_blank" rel="noopener"> <picture> <source srcset="https://benjiao.net/posts/catfood-level-sensor/images/catfood-bin_hu_e0ef7535982e803e.webp" type="image/webp"> <img src="https://benjiao.net/posts/catfood-level-sensor/images/catfood-bin_hu_e0ef7535982e803e.webp" width="1455" height="970" alt="Our catfood bin" loading="lazy" decoding="async" style="max-width:100%;height:auto;" /> </picture> </a> <p>I&rsquo;ve also been wanting to share more of my non-synthesizer related electronics projects so here we go&hellip;</p> <h1 id="the-idea">The Idea</h1> <p>The idea was to design a device that would let us keep track of our cat food and litter levels and would alert us if any of these are running low. The plan was to:</p>