Building an e-paper status dashboard is the right project to learn how much the display technology constrains the software stack. We walk hardware choices (Pi versus ESP32), the refresh and ghosting physics that shape the design, partial-refresh strategies, ESPHome and Python options for rendering, deep sleep for months of battery life, and the enclosure and mounting decisions that make the difference.
Diy
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Build an E-Paper Status Dashboard -
Sous Vide Is Just a PID Loop Precision cooking is control theory wearing an apron. Why water is the ideal thermal medium, what PID actually does inside an immersion circulator and why cheap ones oscillate, the pasteurization math (D-values and log reduction), thickness-based heating times, searing as a separate high-rate process, and where sous vide genuinely wins versus where it's nerd theater.
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Fermentation as Bioprocess Control Sourdough, kraut, and kimchi are managed microbial workloads, not magic. Salt and pH are your firewall rules, the lactic-acid-bacteria succession is a bootstrap sequence, a starter is a pet you cannot rebuild from a manifest, and pH 4.6 is the hard safety boundary. A control-theory tour of the crock.
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Traeger Grills: Fixing, Hacking, and Improving A Traeger is an embedded control system that happens to make brisket. This guide tears down how the pellet grill control loop actually works — auger, hot rod, induction fan, RTD — then walks through every classic failure mode and its fix, the controller generations from analog dial to cloud-tethered WiFIRE, third-party and open-source controller replacements like PiFire, the mods that genuinely help, and the maintenance schedule that prevents the 2am brisket failure.
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3D Printing for Your Homelab A practical catalog of 3D-printable upgrades that turn a messy homelab into a serviceable one — mini-racks, Pi and SBC mounts, cable management, drive caddies, and labeled panels — with notes on which community designs are actually worth printing.