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1. 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





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  • By: guest on 02 Jun 2017 12.55 am
    Timer operated in mono, mode RAC = ∴ RA = 41.4 KΩ R = = 600 Ω.
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