I keep saying that my electronics "career" is on the wane, but my latest article is now on the shelves in WH Smith in the UK (
Everyday Practical Electronics). With many of my designs, I have sought to unhinge the design from absolutes -- in this case, from absolute light level. It picks up
fluctuations in light level -- but only
rapid fluctuations -- and operates over the considerable range 200-10,000 lux. It combines simplicity and sensitivity. One of the things this circuit could do, as an example, is monitor an entire street for movement.
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