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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WeHireIt Map Search: Find Hire Items Near You
WeHireIt now shows hire items on a map. Drag a pin, pick a radius, and see nearby gear with photos. Approximate location only — never an exact address.
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Descent Co-op on Two PCs: DXX-Redux Fixed Multiplayer in One Try
Descent co-op on two Windows PCs. DXX-Rebirth failed for days with network-looking symptoms. DXX-Redux joined on the first try. Plus: how co-op saves keep every player’s inventory.
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How to Repair Brittle Automotive Wiring Connectors
Replace a broken sealed connector half instead of the full harness. SICMA Mini-Sealed 1.5 repair guide for engine-bay wiring.
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What’s new in the TekOnline 8-Zone HVAC Controller V3?
Control up to eight 24VAC HVAC dampers with ESPHome and Home Assistant. TekOnline V3 adds individual timed damper positioning, current monitoring and advanced UART expansion.
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An Audit Trail Is Not a Ticket Journal
A system can record who changed a field without helping the next person understand what happened. That difference matters when forms become ticket systems.
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Solve Your Own Problem First: The Best Way to Build Useful Software
The best way to build useful software: solve a problem for yourself. Lessons from a booking platform payment flow that had to be bulletproof.