▪ A monostable 555 timer is required to produce a time delay within a circuit. If a 10uF timing capacitor is used, calculate the value of the resistor required to produce a minimum output time delay of 500ms. ▪ Consider a monostable 555 timer with VCC = 12 V, R1 = 33 kn, and Cl = 0.47 µF. What is the minimum trigger voltage that produces an output pulse? What is the maximum capacitor voltage? What is the width of the output pulse? ▪ An astable 555 oscillator is constructed using R1 = 1k0, R2 = 2kn and capacitor C= 100 µF. Calculate the output frequency from the 555 oscillator and the duty cycle. ▪ An astable 555 timer has R1 = 75 kN, R2 = 30 kn, and C = 47 nF. What is frequency of the output signal? What is the duty cycle?

▪ A monostable 555 timer is required to produce a time delay within a circuit. If a 10uF timing capacitor is used, calculate the value of the resistor required to produce a minimum output time delay of 500ms. ▪ Consider a monostable 555 timer with VCC = 12 V, R1 = 33 kn, and Cl = 0.47 µF. What is the minimum trigger voltage that produces an output pulse? What is the maximum capacitor voltage? What is the width of the output pulse? ▪ An astable 555 oscillator is constructed using R1 = 1k0, R2 = 2kn and capacitor C= 100 µF. Calculate the output frequency from the 555 oscillator and the duty cycle. ▪ An astable 555 timer has R1 = 75 kN, R2 = 30 kn, and C = 47 nF. What is frequency of the output signal? What is the duty cycle?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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25 A timer is set in PWM mode 1 Peripheral clock = 48MHZ Prescaler = 8 %3D Value in TGRA = 0XD6D8 %3D Value in TGRB = 0X88B8 %3D Calculate the Frequency of the signal generated O100HZ O 171.42HZ .O 109HZ 50HZ
(a) Construct a transition table and state graph for the circuit shown. (b) Construct a timing chart for the input sequence X = 10101. (Assume that ini- tially Q1 = Q2 = 0 and that X changes midway between the rising and falling clock edges.) Indicate the times Z has the correct value. (c) List the output values produced by the input sequence. J1 X Clk - O Ck FF K Qi J2 Ck FF
Design a dual 0-100% duty cycle 555 Timer circuit that uses an astable 555 Timer to produce a triggering signal for a monostable 555 Timer that is controlled by a 0-5V DC input signal at pin 5. The output duty cycle signal must be produced by the monostable 555 Timer and it should have a frequency of 50Hz (Period of 0.02s).
Please solve 1. For the timer circuit above, the period of the square output wave measured at pin 3 is a) 10.4 msec b) 27.7 msec c) 60 sec d) 47.1 msec e) none of these
The astable 555 Timer operates as follows: 1) When the timer is initially turned on, the capacitor C is completely discharged and begins charging through the combined resistance of R1 and R2 (series) and the output is equivalent to the source voltage, Vs. 2) When the voltage on the capacitor C reaches 2/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to go to 0V, causing the capacitor C to discharge through resistor R2 and the output to go to 0V. 3) Once the voltage on the capacitor C falls to 1/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to no longer be 0V, and the capacitor C begins charging through resistors R1 and R2 and setting the output voltage back to the source voltage.NOTE: if the capacitor is initially charged (Vo), the capacitor charging equation becomes: Vc= Vs+(Vo―Vs)e^(-t/(RC)) 4)Steps 2 and 3 are repeated until power is removed from the circuit and the capacitor fully…
The astable 555 Timer operates as follows: 1) When the timer is initially turned on, the capacitor C is completely discharged and begins charging through the combined resistance of R1 and R2 (series) and the output is equivalent to the source voltage, Vs. 2) When the voltage on the capacitor C reaches 2/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to go to 0V, causing the capacitor C to discharge through resistor R2 and the output to go to 0V. 3) Once the voltage on the capacitor C falls to 1/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to no longer be 0V, and the capacitor C begins charging through resistors R1 and R2 and setting the output voltage back to the source voltage.NOTE: if the capacitor is initially charged (Vo), the capacitor charging equation becomes: Vc= Vs+(Vo―Vs)e^(-t/(RC)) 4)Steps 2 and 3 are repeated until power is removed from the circuit and the capacitor fully…
The astable 555 Timer operates as follows: 1) When the timer is initially turned on, the capacitor C is completely discharged and begins charging through the combined resistance of R1 and R2 (series) and the output is equivalent to the source voltage, Vs. 2) When the voltage on the capacitor C reaches 2/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to go to 0V, causing the capacitor C to discharge through resistor R2 and the output to go to 0V. 3) Once the voltage on the capacitor C falls to 1/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to no longer be 0V, and the capacitor C begins charging through resistors R1 and R2 and setting the output voltage back to the source voltage.NOTE: if the capacitor is initially charged (Vo), the capacitor charging equation becomes: Vc= Vs+(Vo―Vs)e^(-t/(RC)) 4)Steps 2 and 3 are repeated until power is removed from the circuit and the capacitor fully…
The astable 555 Timer operates as follows: 1) When the timer is initially turned on, the capacitor C is completely discharged and begins charging through the combined resistance of R1 and R2 (series) and the output is equivalent to the source voltage, Vs. 2) When the voltage on the capacitor C reaches 2/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to go to 0V, causing the capacitor C to discharge through resistor R2 and the output to go to 0V. 3) Once the voltage on the capacitor C falls to 1/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to no longer be 0V, and the capacitor C begins charging through resistors R1 and R2 and setting the output voltage back to the source voltage.NOTE: if the capacitor is initially charged (Vo), the capacitor charging equation becomes: Vc= Vs+(Vo―Vs)e^(-t/(RC)) 4)Steps 2 and 3 are repeated until power is removed from the circuit and the capacitor fully…
1) The trigger waveform of the monostable multivibrator has an amplitude that must be less than cc 3 a) True. b) False. (if false correct the sentence)
For the timer curcuit above, the duty cycle of the square output wave measured at pin3 is? a)31.25% b)69% c)63.3% d) 10% e) none of the above
The astable 555 Timer operates as follows: 1) When the timer is initially turned on, the capacitor C is completely discharged and begins charging through the combined resistance of R1 and R2 (series) and the output is equivalent to the source voltage, Vs. 2) When the voltage on the capacitor C reaches 2/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to go to 0V, causing the capacitor C to discharge through resistor R2 and the output to go to 0V. 3) Once the voltage on the capacitor C falls to 1/3rd of the supply voltage, the internal circuitry of the 555 Timer IC causes the DIS pin to no longer be 0V, and the capacitor C begins charging through resistors R1 and R2 and setting the output voltage back to the source voltage.NOTE: if the capacitor is initially charged (Vo), the capacitor charging equation becomes: Vc= Vs+(Vo―Vs)e^(-t/(RC)) 4)Steps 2 and 3 are repeated until power is removed from the circuit and the capacitor fully…
4. The LM317 is an example of an IC A. three-terminal negative voltage regulator B. variable positive voltage regulator C. fixed positive voltage regulator D. switching regulator 5. Analog multiplexer called time-division multiplexer because of: A. It required fixed time period to operate. B. The signals are time overlapped throughout the output. C. The MOSFETS turning on and off half of the time. D. The input signals are time variants. 6. The basic difference between a series regulator and a shunt regulator is: A. the amount of current that can be handled B. the position of the control element C. the type of sample circuit D. the type of error detector