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Over time I’ve received some questions regarding the hardware design of OpenSprinkler. Here are some common questions and my answers: Why using a switching regulator? Since OpenSprinkler uses a single power supply (i.e. 24VAC sprinkler transformer), it is necessary to step down 24VAC to 5VDC and 3.3VDC in order to provide power to the circuit. […]

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The initial version of the interval schedule program is now available for download in my GitHub page: https://github.com/rayshobby/opensprinkler Note that all demo programs are moved to the Libraries->OpenSprinkler->examples directory. This makes it easy to load a demo program in Arduino. For example, once you put the OpenSprinkler library in your Arduino’s Libraries path, you can […]

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Yup, you heard it right, version 1.2u of OpenSprinkler will debut at Maker Faire Bay Area on May 19 and 20. If you are going to Maker Faire, you are welcome to drop by and see our live demos. I started working on v1.2u shortly after releasing v1.1, and we were lucky to get the […]

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You heard it right: we are going to this year’s Maker Faire at San Mateo, California on May 19 & 20! We will be giving live demonstrations of the OpenSprinkler, AASaver, and two exciting upcoming open-source projects: OpenSprinkler Bee (battery-operated sprinkler controller), and SquareWear (a compact wearable electronics platform). If you are planning to go […]

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After several weeks of hard work, I am excited to announce that OpenSprinkler v1.1 is now available! So what’s new in this version? The biggest improved feature is hardware support for arbitrary (>8) number of stations through extension boards. This was actually quite easy to implement: the main hardware change is added pinouts for the […]

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