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With respect to the following 555 timer circuit what will be the value of RA and R such that the LED turns on for a duration of 10 ms every time it receives negative trigger pulse. LED operating current = 20 mA, Vf = 1.4 V, Vo on = 13.4 V and C = 0.22 nf | |
A. | 41.4 KΩ, 600 Ω [Correct Answer] |
B. | 45 KΩ, 630 Ω [Wrong Answer] |
C. | 43.5 KΩ, 580 Ω [Wrong Answer] |
D. | 44.9 KΩ, 600 Ω [Wrong Answer] |
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