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BLOG · 11/2/2024

kunal Desai
kunal Desai
OP
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TASK 13:\n Design a 555 astable multivibrator with a duty cycle 60%, rig up the circuit on a breadboard, and by using the probes observe the output of your circuit on the DSO.\nBasic Astable 555 Oscillator: The 555 IC can function as an astable oscillator to generate continuous square wave pulses. It operates by continuously re-triggering itself, allowing it to function as a free-running oscillator.\n\ncircuit configuration: Connect pins 2 (trigger) and 6 (threshold) together to enable re-triggering for astable operation. The timing resistor from the monostable circuit is split into two resistors, R1 and R2.\n\nWaveform Generation: During each cycle, the capacitor charges through both R1 and R2 but discharges only through R2. Output waveform voltage level is approximately Vcc−1.5V.\n\nCharge and Discharge Times: Charge time (t1) and discharge time (t2) determine the frequency of oscillations. T=t1+t2, where T is the total periodic time.\n\nOutput Frequency Equation: f=1/T=1/(t1+t2).\n\nDuty Cycle Adjustment: The duty cycle can be adjusted by changing the ratio of resistors R2 to R1. The duty cycle is the ratio of the \ON" time to the "OFF" time.\n\n"

UVCE,
K. R Circle,
Bengaluru 01