Software meets hardware.
Code, circuits, hydraulics, and the things that connect them.
Projects and practical notes by Jon.
From the workbench
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Reliable Playwright Testing in AI-Assisted Development
A practical Playwright workflow for AI-assisted development: launch the right app, wait for real UI state, verify selectors, control async requests, and test without polluting shared data.
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How a SHA-256 Manifest Makes a Deployment Safer
PowerShell examples for creating a SHA-256 manifest, verifying staged files, and switching IIS only after the release passes.
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EasyEDA Standard vs Pro: Shortcut Cheat Sheet
A practical shortcut matrix for EasyEDA Standard and Pro, including the key differences in net labels, PCB routing, vias and copper pours.
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New TekOnline Wall Controller: Preview and Launch Updates
Preview the upcoming TekOnline touchscreen wall controller. Targeting early November 2026; subscribe for development and availability updates.
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Windows 11 mouse stutter and loud fans on a Dell Precision 5550: specs, findings and a call for reports
Our Dell Precision 5550 mouse stutter returned on 12 October. PC specs, CPU temperatures, kernel trace findings, DisplayLink and wireless-interference research—and a call for comparable experiences.
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TekOnline 8-Zone Controller V3 Pro (V4 Hardware): Wi-Fi and Home Assistant Setup
Set up the TekOnline 8-Zone Controller V3 Pro (V4 hardware): connect Wi-Fi, add Home Assistant, calibrate travel times and use Target Open and Estimated Open controls.