This document provides an overview of the monostable operation of the 555 timer integrated circuit. It begins with an introduction to the 555 timer and its modes of operation, including monostable, bistable, and astable. It then explains that in monostable mode, the 555 timer produces a single output pulse when triggered externally and returns to its original stable state after a time period determined by the RC circuit. Examples of applications for monostable 555 timers include water level fill control, touch switches, frequency division, and missing pulse detection. The document concludes with acknowledgments of reference materials.

1. COURSE TITLE : ANALOG ELECTRONIC CIRCUIT II SESSIONAL
COURSE NO. : 2206
PRESENTATION TOPIC : ‘MONOSTABLE OPERATION OF 555 TIMER IC’
PREPARED BY
HASNIN JERIN RASHA
ID: 1710031
DEPT. OF ELECTRICAL & COMPUTER ENGINEERING, RUET.
3/3/2023 1

2. OUTLINE
What is monostable 555 timer IC
Operation of Monostable timer
It’s applications
Question Answer Section
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3. WHAT IS MONOSTABLE TIMER?
 555 Timer : It’s a timing circuit that
can produce accurately and highly
stable time delays or oscillation.
 Mode of Operations :
 Monostable operation
 Bistable operation
 Astable Operation
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4. MONOSTABLE OPERATION
Monostable Multivibrators
have only ONE stable state and
produce a single output pulse
when it is triggered externally.
Monostable Multivibrators only
return back to their first
original and stable state after a
period of time determined by
the time constant of
the RC coupled circuit.
• Generates a single state.
• Single output pulse
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5. INPUT OUTPUT WAVESHAPES
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6. APPLICATIONS
 Water-level Fill control.
 Touch Switch
 Frequency Divider
 Missing Pulse Detector
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7. ACKNOWLEDGMENTS
1. Operational Amplifiers And Linear Integrated Circuits By Robert F. Coughlin,Frederick
F. Driscoll .
2. Electronics Tutorial (Link : https://www.electronics-tutorials.ws/waveforms/555_timer.html)
3. Electronics club ( Link: https://electronicsclub.info/555monostable.htm )
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8. QUESTION-ANSWER SECTION
Thank You….
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