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CNEN
2024-06-13
TR1由R1的電壓來控制導通或截止，TR1的導通電壓是0.7V，光敏的光電流典型值是6微安@10lux（鑫永誠光源下，不同光源下的光電流會有所差異），把R1設置為100KΩ，則在10lux時Vr1為0.6V，小于0.7V，此時TR1為截止狀態
R1上的電壓是隨光照呈線性變化的，光越強、電壓越大至Vcc-1V
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