Monostable Multivibrator Applications

Pin-6 = Non-inverting terminal of the upper comparator Pin-7 = Collector of the discharge transistor Pin-8 = Positive supply voltage connection

Pin-6 = Setting the flipflop and making the timer output low Pin-7 = Discharging the external capacitor Pin-8 = Connection for positive supply voltage

Monostable multivibrator = Functioning as a one-shot multivibrator Astable multivibrator = Generating continuous square wave signals Pulse Width Modulator (PWM) = Regulating the width of output pulses Voltage Controlled Oscillator = Producing frequency-modulated signals

<p>Pulse Amplitude Modulator (PAM) = Not mentioned in IC 555 applications Pulse Position Modulator (PPM) = Not mentioned in IC 555 applications Frequency-Shift Keying (FSK) = Not mentioned in IC 555 applications Ramp Generator = Not mentioned in IC 555 applications</p> Signup and view all the answers

<p>TV sleep timer = IC-555 Washing machine timer = IC-555 Traffic signaling timer = IC-555 Industrial heating timer = IC-555</p> Signup and view all the answers

<p>Burglar alarms = IC-555 Voltage control oscillators = IC-555 Ramp generators = IC-555 Styling web pages = CSS</p> Signup and view all the answers

<p>Comparators (using op-amp) = IC-555 RS flip-flop = IC-555 Discharge transistor = IC-555 Multiplexer = SQL</p> Signup and view all the answers

<p>+5V to +18V = IC-555 +3.3V only = JavaScript +12V to +24V = Python +1.5V to +4.5V = CSS</p> Signup and view all the answers

<p>Monostable multivibrators = IC-555 applications Astable multivibrators = Electronic systems Waveform generators = Voltage control oscillators Database queries = SQL</p> Signup and view all the answers

<p>Pin-1: Ground = Reference or ground point of the IC Pin-2: Vcc = +5V to +18V supply voltage range Pin-3: Output = Output signal of the IC Pin-4: Reset = Reset input for the IC</p> Signup and view all the answers

<p>Lower comparator = Resetting the flip-flop when capacitor voltage is less than VCC/3 Upper comparator = Setting the flip-flop when capacitor voltage reaches 2VCC/3 Transistor = Cutting off during the charging phase and saturating during the discharging phase Capacitor = Charging through series resistors during the charging time and discharging through RB during the discharging time</p> Signup and view all the answers

<p>Lower comparator output goes high = Resets the flip-flop, making the timer output go high Upper comparator provides a high output = Sets the flip-flop, making the timer output go low Transistor saturates = Output goes to a low state Capacitor starts discharging through RB and the transistor = Leads to the timer output going high after reaching VCC/3</p> Signup and view all the answers

<p>Pin-4 connected to supply voltage = Power supply connection Pin-5 bypassed to ground through a capacitor = Noise filtering from the control voltage External components connected to Pin-5 = Capacitor of 0.01 μF for noise filtration Internal components of IC 555 not shown = Only external components shown in schematic diagram</p> Signup and view all the answers

<p>Charging time (tc) = Time during which the timer output is high Discharging time (td) = Time during which the timer output is low Total time period (T) = Sum of charging time and discharging time Capacitor charges from VCC/3 to 2VCC/3 = Charging phase of the capacitor</p> Signup and view all the answers

<p>ON TIME (tON) = 0.693 (RA + RB) C OFF TIME (tOFF) = 0.693 RB C Total time period (T) = 0.693 (RA + 2RB) C Duty Cycle (D) = tON / T</p> Signup and view all the answers

<p>tOFF = td = Discharging time Duty Cycle = D = Ratio of on time to total time period f = 1 / T = Frequency of oscillation T = tc + td = Total time period of the output waveform</p> Signup and view all the answers

<p>Square wave oscillator = Produces continuous train of rectangular pulses Free running ramp generator = Can be used as clock signal in digital circuits Voltage control oscillator (VCO) = One of the applications of Astable multivibrator Clock signal in digital circuits = Generated by Astable multivibrator</p> Signup and view all the answers

<p>2VCC/3 = Initial voltage level during discharging VCC/3 = Final voltage level during discharging VCC = Voltage level not mentioned in discharging process 3VCC/2 = Voltage level not mentioned in discharging process</p> Signup and view all the answers

<p>RA = Affects the timing of ON TIME and frequency of oscillation RB = Affects the timing of OFF TIME and duty cycle C = Capacitance value influencing time periods 1.44 = Constant factor in calculating frequency</p> Signup and view all the answers

<p>Frequency divider = Divides input frequency by a certain factor Pulse width modulator = Modulates the width of input pulses PAM and PPM (pulse position modulator) = Modulates pulse position for analog and digital signals Trigger circuit for providing ‘gating pulse’ in digital systems = Generates pulse for gating in digital circuits</p> Signup and view all the answers

<p>vc = VCC (1 – e^(-t/RC)) = Voltage across capacitor during charging tp = RC log_e(1/3) = Time taken by capacitor to charge from 0 to 2VCC/3 (2VCC - VCC) = VCC(1 - e^(-tp/3RC)) = Equation for capacitor voltage reaching 2VCC/3 tp = 1.1 RC = Formula for varying ON TIME by changing R or C or both</p> Signup and view all the answers

<p>Monostable multivibrator = Has one stable state and changes to unstable state after a trigger Astable multivibrator = Does not have any stable state and changes states periodically Free-running multivibrator = Operates without external trigger to change output state Bistable multivibrator = Has two stable states and can remain in either until triggered</p> Signup and view all the answers

<p>Monostable operation = Produce a single pulse of a specified duration upon trigger Astable operation = Generate continuous square wave output without external triggering Bistable operation = Remain in one of two stable states until triggered to switch</p> Signup and view all the answers

<p>Changing R = Varies the charging rate of the capacitor Changing C = Alters the capacity of the capacitor affecting charging time Changing both R and C = Combined effect on charging time and ON TIME Maintaining constant R and C = Keeps ON TIME consistent over multiple cycles</p> Signup and view all the answers

<p>Threshold input (pin 6) = 'Set' voltage level that triggers a change in output state Trigger input (pin 2) = 'Reset' voltage level that initiates a change in output state Stable state = State where output remains until an external trigger is received Unstable state = 'Transient' state that changes periodically without external triggers</p> Signup and view all the answers