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Update: OpenSprinkler Beagle is officially released, and is available for purchase at Rayshobby Shop. A lot of prototype PCBs arrived over the weekend. Among them is my long-waited OpenSprinkler Beagle — a sprinkler / irrigation extension board for the BeagleBone Black. Cool, time for some prototyping actions! The design of OpenSprinkler Beagle largely follows OpenSprinkler […]

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As I am getting more experienced with the TM-240A pick and place machine (in the following I will call it the PNP machine, as in PNP transistors 🙂 ), I’ve been thinking of ways to improve productivity. One obvious way is to panelize PCBs, meaning to assemble multiple copies of the PCB onto the same […]

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Update: OpenSprinkler new mobile app (native version) is now available on all platforms. Search ‘opensprinkler’ in iOS App Store, Android Play Store, or Windows Phone Store, then download and install the app. Additional details can be found in this blog post. In this blog post, I will walk you through the basic steps to set […]

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Hi, this is a new product post for OpenSprinkler Pi (OSPi) v1.2. Since its original release, OSPi has become a very popular product. This version is a minor revision. The main change compared to version 1.1 is the addition of a PCF8591T 8-bit A/D D/A converter, which provides four independent 8-bit analog input pins, and […]

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One of the hallmarks of OpenSprinkler / OpenSprinkler Pi is the capability of expanding the number of zones. While the main controller can only interface with 8 zones, you can expand beyond 8 zones by daisy chaining Zone Expansion boards. Each expansion board adds another 8 zones. Because the zone expansion is implemented using shift […]

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