Posted in OpenSprinkler, Sprinkler Projects on Aug 30th, 2026
Four ways to drive 24VAC sprinkler solenoids from USB-C, with theory, circuit designs, oscilloscope measurements, and practical tradeoffs.
Posted in ESP32, MakeBusiness, OpenSprinkler, Sprinkler Projects on Aug 19th, 2026
Exciting news! We’re getting ready to launch the next generation of OpenSprinkler: AC-Powered OpenSprinkler v4.0, the first built on ESP32. From the outside it looks just like v3.4 — same enclosure and same ports — but inside is an entirely new brain, with a faster processor, more memory and flash space, WiFi 6, analog inputs, […]
Posted in Apps, OpenSprinkler, Sensors, Sprinkler Projects on Aug 3rd, 2026
Some projects take a weekend. Some take a summer. And some take… a little over five years. Today I’m thrilled to make two announcements at once: OpenSprinkler Firmware 2.2.1(5) is officially available, and the Sensor Expander — after a month of pre-orders — is officially shipping. As detailed in our previous New Product Alert post, […]
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