Definition of phototransistor in English:

phototransistor

Line breaks: photo|tran¦sis¦tor
Pronunciation: /ˌfəʊtəʊtranˈzɪstə
 
, -trɑːnˈzɪstə, -ˈsɪstə/

noun

  • A transistor that responds to light striking it by generating and amplifying an electric current.
    More example sentences
    • It contains an infrared light-emitting diode as a light source and a phototransistor as a light detector.
    • The output phototransistor features a 30 V collector-emitter voltage and 5 V in the opposite direction.

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