{"$schema":"https://ejfox.com/schema/page-twin@1.json","kind":"project","url":"https://ejfox.com/projects/flipper-space-calculators","json_url":"https://ejfox.com/projects/flipper-space-calculators.json","generator":"ejfox.com/json-twin@1","data":{"cacheVersion":"2026-05-13-gear-cards","html":"<!-- TODO (EJ): on-device screenshot from Photo Day still wanted. -->\n<p class=\"\">A set of minimalist space- and physics calculators for the Flipper Zero — relativistic time dilation, space-travel figuring, and friends, all on the 128×64 screen for back-of-the-napkin astrophysics in your pocket.</p>\n<p class=\"\">I think I like it because it's so useless but still utilitarian — cyberpunk and gestural. It's a tool for a time / space-traveler who doesn't exist, or maybe does, and makes a tool that he would find handy.</p>\n<p class=\"\">It's also an experiment in pushing what small Flipper apps can do, and imagining utilities that would make sense within its capabilities — using the limits as a method of inspiration. This is what came from that.</p>\n<figure role=\"figure\" aria-label=\"The orbital-mechanics constants and transfer math, in C on the Flipper Zero\" class=\"\">\n<img src=\"https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_1280/projects/flipper-space-calculators/code.png\" alt=\"The orbital-mechanics constants and transfer math, in C on the Flipper Zero\" loading=\"lazy\" decoding=\"async\" srcset=\"https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_640/projects/flipper-space-calculators/code.png 640w, https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_960/projects/flipper-space-calculators/code.png 960w, https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_1280/projects/flipper-space-calculators/code.png 1280w, https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_1920/projects/flipper-space-calculators/code.png 1920w\" sizes=\"(max-width: 430px) 92vw, (max-width: 768px) 85vw, 900px\" title=\"The orbital-mechanics constants and transfer math, in C on the Flipper Zero\" width=\"1400\" height=\"900\" style=\"--splay-rot:-2.06deg;\" data-dimensions=\"1400×900\" class=\"img-full my-8 rounded-sm img-splay w-full mx-auto py-4\" crossorigin=\"anonymous\">\n<figcaption class=\"\">The orbital-mechanics constants and transfer math, in C on the Flipper Zero</figcaption>\n</figure>\n<figure role=\"figure\" aria-label=\"The transfer solver — delta-v, flight time, and a celestial-body database keyed by semi-major axis\" class=\"\">\n<img src=\"https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_1280/projects/flipper-space-calculators/code2.png\" alt=\"The transfer solver — delta-v, flight time, and a celestial-body database keyed by semi-major axis\" loading=\"lazy\" decoding=\"async\" srcset=\"https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_640/projects/flipper-space-calculators/code2.png 640w, https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_960/projects/flipper-space-calculators/code2.png 960w, https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_1280/projects/flipper-space-calculators/code2.png 1280w, https://res.cloudinary.com/ejf/image/upload/c_scale,f_auto,q_auto:good,w_1920/projects/flipper-space-calculators/code2.png 1920w\" sizes=\"(max-width: 430px) 92vw, (max-width: 768px) 85vw, 900px\" title=\"The transfer solver — delta-v, flight time, and a celestial-body database keyed by semi-major axis\" width=\"1400\" height=\"900\" style=\"--splay-rot:-0.89deg;\" data-dimensions=\"1400×900\" class=\"img-full my-8 rounded-sm img-splay w-full mx-auto py-4\" crossorigin=\"anonymous\">\n<figcaption class=\"\">The transfer solver — delta-v, flight time, and a celestial-body database keyed by semi-major axis</figcaption>\n</figure>","title":"Flipper Space Calculators","metadata":{"title":"Flipper Space Calculators","date":"2025-01-20T05:00:00.000Z","category":"Hardware","featured":false,"url":"https://github.com/ejfox/flipper-space-calculators","tech":["Flipper Zero","C","Embedded"],"state":"deployed","ai-involvement":"ai-assisted","tags":["flipper","hardware","device","science"],"words":147,"images":2,"imageDetails":{"total":2,"cloudinary":2,"withDimensions":0},"links":2,"codeBlocks":0,"headers":{},"toc":[],"type":"post"}},"_links":{"self":"https://ejfox.com/projects/flipper-space-calculators.json","html":"https://ejfox.com/projects/flipper-space-calculators","index":"/projects.json"}}