![]() The main reason to limit it to 8 is to keep the controller small, since going beyond 8 would require space to put another IC and additional terminal blocks. The Arduino ShiftOut tutorial has an example (see Example 2). You can cascade a second shift register to expand that to 16 and still using only 3 MCU pins. The controller uses a 74HC595 shift register to allow 8 outputs from only 3 MCU pins. Because it’s open-source, you can feel free to build it, program it, modify it, or hack it! The design, including schematic, PCB, and parts list can be found in the Download section.īill, yes that’s possible. If you are a technical developer, you can easily customize and extend its functionality, both software and hardware. ![]() There is a strong educational aspect of it. OpenSprinkler is built on open-source hardware and software.OpenSprinkler is shipped worldwide, and supports many different languages.These features are rarely found in competing products. The software offers a rich set of features, such as flexible program start times, graphical preview of program schedules and logging data, custom zone and program names, support to run zones either in sequence or parallel, water time down to one second.The cost is considerably cheaper than competing products on the market. ![]()
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