The noise level is a bit higher, perhaps due to the 2 mV/div setting of the scope. For example, I noticed that there were blips every 32 mS or so (it’s slightly irregular): The closer you look, you more you find things to optimize. There is almost always room for improvement with this sort of stuff. It took about 3 ms between the end of the packet transmission and the first ACK packet header byte coming in – this thumb-twitching with the receiver enabled accounts for about 1/3rd of the power consumption!
the total amount of energy consumed as time progresses.
The red line is the integral of the yellow line, i.e. I’ve added some annotations, although there are still a few things I’m not so sure about, such as the 2.5 ms delay between SHT readout and XMIT start. The yellow line is the current consumption of the entire room node. Here’s an annotated capture of a motion event: Now that my analysis capabilities have improved, it thought it’d be interesting to see the power consumption profile of a Room Node, running the roomNode.ino sketch.
SLEEPWATCHER SCRIPTS TO EJECT TIME MACHINE BEFORE SLEEP UPDATE
Update – for another example of how such X-Y displays differ between analog and high-end vs low-end DSO’s, see this video on Dave Jones’ EEVblog. I wish you a healthy, safe, and happy 2012 – with lots of opportunities to tinker, learn, and create. This design was from 2007, I think – which goes to show that fun stuff (especially clocks) can be time-less! That’s what you get when digital sampling, waveform refresh rates, and vector drawing clash (bumping up the sampling rate causes a fuller, but flickering, image). Recognizable, but a far cry from what analog scopes can do. Besides, it turns out that it didn’t work back then because of some bad solder joints (ground planes and 15W soldering irons don’t go well together – even my current soldering iron has trouble heating up some of those pads!).Īnyway, this is as far as the Hameg HMO2024 will go: I bought this little kit long ago, not realizing that a low-end USB scope front-end can’t deal with it. Another year is about to end, and the next one is already anxiously waiting to carry us along into the future…Ī fitting moment to get that Dutchtronix clock working (a lot easier than this geek version):
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