A tiny solar-powered server only awake during the day
Solar Witch is a little webpage and server which receives and displays messages, so I suppose it's a tiny message board. It's coded in very dubious Arduino C. It's not a 24/7 website. Depending on the state of the battery, the server itself might run all night, but all the messages it receives during the day are deleted at sunset, and the messaging function itself is only active between sunrise and sunset. This is for two reasons: 1. Less usage of Solar Witch during the night conserves battery power. 2. I like the idea of websites which _aren't_ constantly available. Websites which have…
A tiny solar-powered server only awake during the day launched on April 2, 2022 with 229 votes, #83 of 2,974 launches that month and more than 95% of that year's launches.
In plain words
Solar Witch is a solar-powered message board that only operates during daylight hours, from sunrise to sunset. All messages posted during the day are deleted at sunset. Built on Arduino, it serves as both an experimental webpage and tiny server for users interested in ephemeral communication. The project prioritizes battery conservation and challenges the assumption that websites must be constantly available, instead creating a service bound to a specific physical location and natural daylight cycles.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Solar Witch is a little webpage and server which receives and displays messages, so I suppose it's a tiny message board. It's coded in very dubious Arduino C. It's not a 24/7 website. Depending on the state of the battery, the server itself might run all night, but all the messages it receives during the day are…
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