Vcc +5 to +15V (Use 9 V) Ra R1 555 TIMER 3 Z LED1 sw1 . SW1 C1 R2 ww ww ww

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Vcc= +5 to +15V
(Use 9 V)
Ra
R1
555
TIMER 3
2.
LED1
R2
SW1
C1
Let Vcc = 9 V, R1 = 10 k-ohm, R2 = 470 ohm, C = 1 uF, and C1 = 0.01 uF.
%3
If the forward bias voltage drop across the LED is 0.7 V, calculate the current through R2 when pin 3 is high.
O 17.7 mA
O 16.6 mA
30 mA
10.6 mA
ww
Transcribed Image Text:Vcc= +5 to +15V (Use 9 V) Ra R1 555 TIMER 3 2. LED1 R2 SW1 C1 Let Vcc = 9 V, R1 = 10 k-ohm, R2 = 470 ohm, C = 1 uF, and C1 = 0.01 uF. %3 If the forward bias voltage drop across the LED is 0.7 V, calculate the current through R2 when pin 3 is high. O 17.7 mA O 16.6 mA 30 mA 10.6 mA ww
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