This light activated relay circuit presented here uses the 555 timer IC and a light dependent resistor or LDR to form a light sensitive relay in an intruder alarm system or for switching on a lamp at ...
Rich was the editorial lead for CNET's Home and Wellness sections, based in Louisville, Kentucky. Before moving to Louisville in 2013, Rich ran CNET's desktop computer review section for 10 years in ...
Physicists and Albert Einstein buffs began flipping light switches and dialing phones Monday night in an attempt at a worldwide relay of lights to commemorate the 50th anniversary of Einstein’s death.
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