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 ...
Designed to help ultility providers push there systems harder, the SEL-421 relay combines distance and directional protection with complete control for two breakers. Breaker-and-a-half and ring-bus ...
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