Posted in CNC, Sprinkler Projects on Oct 21st, 2012
I have a new toy that came in two weeks ago: it’s a Full Spectrum 40W hobby laser cutter! It has been sitting in the shipping box for all this time. This weekend I finally gather everything I needed to set it up, and here are some fresh-made engravings: Not too bad for the first […]
Posted in Arduino, Sprinkler Projects on Oct 18th, 2012
Recently I received a request to customize OpenSprinkler for a 12V DC external relay board. It turns out to be relatively easy to do. Since it may be useful for other folks, I am writing a post here to briefly describe the modifications. First of all, the relay board has built-in opto-couplers and flyback diodes. […]
Hi, I am excited to announce the arrival of SquareWear — a new open-source microcontroller board I designed for wearable electronics projects. First off, here is an introduction video: Background. So why did I work on this? Well, last year I helped my school with several wearable electronics workshops. They were great success: the students […]
Posted in Sprinkler Projects on Oct 9th, 2012
OpenSprinkler’s 1-year anniversary! Yes, on Oct 9 last year, the OpenSprinkler project got posted on Hackaday and became known to the world for the first time. A lot of updates have happened during this past year. The hardware has gone through four cycles of changes, and the latest version is 1.4. From August 2011 we […]
Posted in Sprinkler Projects on Oct 8th, 2012
Update: OpenSprinkler 2.0 or above uses a different switching regulator and does not require additional resistor any more. The information below is only relevant to OpenSprinkler 1.x. As you know, OpenSprinkler uses a single 24VAc sprinkler transformer to power both the circuit and the sprinkler solenoids. Frequently people are using a WiFi adapter together with […]
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