CNEN
2024-06-13
TR1由R1的電壓來(lái)控制導(dǎo)通或截止,TR1的導(dǎo)通電壓是0.7V,光敏的光電流典型值是6微安@10lux(鑫永誠(chéng)光源下,不同光源下的光電流會(huì)有所差異),把R1設(shè)置為100KΩ,則在10lux時(shí)Vr1為0.6V,小于0.7V,此時(shí)TR1為截止?fàn)顟B(tài)
R1上的電壓是隨光照呈線性變化的,光越強(qiáng)、電壓越大至Vcc-1V
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