An ultra-low power sensor operates using energy harvesting from various sources for efficient monitoring. The oscillator ...
As with other DIY systems we’ve seen over the years, [Will] is using a simple inductive current sensor to detect when ... So he threw together a rectifier circuit on a piece of perfboard ...
It’s just a simple sensor for detecting ground vibrations, whether they be due to passing trucks or The Big One. [Alex] lives in California, wedged between the Hayward, Calaveras, and San ...
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