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  2. Opto-isolator - Wikipedia

    en.wikipedia.org/wiki/Opto-isolator

    Schematic diagram of an opto-isolator showing source of light (LED) on the left, dielectric barrier in the center, and sensor (phototransistor) on the right [note 1]. An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. [1]

  3. California's 29th congressional district - Wikipedia

    en.wikipedia.org/wiki/California's_29th...

    The 29th and 30th are partitioned by Angeles National Forest, NF-4N35, Gold Creek Road, Big Tujunga Canyon Road, Little Tujunga Road, Longford Street, Clybourne Avenue, Foothill Freeway, Kagel Canyon Street, Osborne Street, Terra Bella Street, Glenoaks Boulevard, Montague Street, San Fernando Road, Branford Street, Tujunga Wash, Wentworth ...

  4. California's 30th congressional district - Wikipedia

    en.wikipedia.org/wiki/California's_30th...

    The 30th and 29th are partitioned by Angeles National Forest, NF-4N35, Gold Creek Rd, Big Tujunga Canyon Rd, Little Tujunga Rd, Longford St, Clybourne Ave, Foothill Freeway, Kagel Canyon St, Osborne St, Terra Bella St, Glenoaks Blvd, Montague St, San Fernando Rd, Branford St, Tujunga Wash, Wentworth St, Sheldon St, Tuxford St, Sunland Blvd ...

  5. 555 timer IC - Wikipedia

    en.wikipedia.org/wiki/555_timer_IC

    Silicon die of the first 555 chip (1971) Die of a CMOS NXP ICM7555 chip The timer IC was designed in 1971 by Hans Camenzind under contract to Signetics. [3] In 1968, he was hired by Signetics to develop a phase-locked loop (PLL) IC.

  6. Fairchild Semiconductor - Wikipedia

    en.wikipedia.org/wiki/Fairchild_Semiconductor

    Fairchild Semiconductor International, Inc. was an American semiconductor company based in San Jose, California.It was founded in 1957 as a division of Fairchild Camera and Instrument by the "traitorous eight" who defected from Shockley Semiconductor Laboratory.

  7. Angeles National Forest - Wikipedia

    en.wikipedia.org/wiki/Angeles_National_Forest

    Monument detailing the history of the Angeles National Forest. The Angeles National Forest (ANF) of the United States Forest Service is located in the San Gabriel Mountains and Sierra Pelona Mountains, primarily within Los Angeles County in southern California.

  8. Hazel Crest, Illinois - Wikipedia

    en.wikipedia.org/wiki/Hazel_Crest,_Illinois

    Hazel Crest was first settled in 1870 in a farming community known as South Harvey. An enterprising newspaper editor named William McClintock moved here from Ohio in 1890, buying 80 acres (320,000 m 2) from farmer Fred Puhrman, McClintock named the town South Harvey, and the town would receive its modern name in 1895, after a referendum.