Timer IC 555 – Exercise – 1

Timer IC 555 » Exercise – 1

1. The 555 timer can be used in which of the following configurations?

(a) astable, monostable
(b) monostable, bistable
(c) astable, toggled
(d) bistable, tristable

Answer
Answer : (a)
Explanation
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2. The equation for the output frequency of a 555 timer operating in the astable mode is: . What value of C1 will be required if R1 = 1 k, R2 = 1 k, and f = 1 kHz?

(a) 0.33 F
(b) 0.48 F
(c) 480 F
(d) 33 nF

Answer
Answer : (b)
Explanation
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