- I'm in need of a simple alarm to indicate a switch (120 VAC) having been left on too long, say more than five minutes. [I know, I could just buy a timer switch, but what's the fun in that?]
- The State of California had a task force investigating water conservation and one of the force's recommendations was to make use of ground moisture sensors so that automatic lawn sprinklers would operate only when needed. The newspaper article about the force's report omitted any and all details about where one obtains such sensors. Inquiry of the local water district finds that there's serious questions about the sensors and making use of them. Anyone have any info about (reliable) soil moisture sensors? Any thoughts about how to incorporate the sensors into the typical lawn sprinkler controller?