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One Shot / Monostable Circuits
#'s - F       G - Z
 

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :

Generate Short Delayed Pulse - This circuit generates a short 10ms pulse 15 minutes after a “start” pushbutton switch is activated . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2005

One Shot (D-Flip/Flop) Circuit - Yes you can use cheap D flip/flop logic circuits as nice one-shot pulse generators.  This schematic shows how the popular CD4013 and the CD74HC74 can be used to generate pulses ranging from nanoseconds to seconds. . . Circuit by Dave Johnson P.E.-June, 2000

Oneshot & Latch Pushbutton - This circuit uses a single IC to convert a noisy pushbutton switch signal into a clean pulse or a sustained push on-push off signal.  It can operate from 3v to 18v . . . Hobby Circuit designed by Dave Johnson P.E.-March, 2002

Pushbutton Oneshot & Latch - This circuit uses a single IC to convert a noisy pushbutton switch signal into a clean pulse or a sustained push on-push off signal.  It can operate from 3v to 18v. . . Circuit by David Johnson P.E.-March, 2002

Turn D-Flip/Flop into a One Shot Circuit - Yes you can use cheap D flip/flop logic circuits as nice one-shot pulse generators.  This schematic shows how the popular CD4013 and the CD74HC74 can be used to generate pulses ranging from nanoseconds to seconds . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Flip Flop -  When output pin 3 is HIGH, the 220n charges through the 220k to 6v.  When pin 3 is LOW, the 220n discharges through the 220k to 0v.  Pressing the switch upsets the 3v created by the two 10k voltage dividers, triggering the flip flop inside the 555 and changing the state__ 555-Timer

Flip Flop -  In this project we examine one of the most valuable circuits to be invented, the flip flop.  Originally it was designed with VALVES, along with its simpler version (without the two capacitors, called a bi-stable Multivibrator) , it was realised it  __ Designed by Collin Mitchell

Flip Flop Flashers Buzzers Etc -  Several circuits here.  The familiar astable flip-flop circuit is a handy configuration for making flashers or generating squarewaves.  Here is a typical alternating LED flasher with the LEDs in the emitters instead of collectors as is normally done.  The bias resistors are directly connected __  Contact:  Charles Wenzel of Wenzel Associates, Inc.

Form Adjustable Bipolar Clamp -  11/22/01  EDN-Design Ideas - The easy way to clamp a signal to a given value is to use two zener diodes, connected back-to-back. This method has several disadvantages.  The accuracy of the clamping depends on the tolerance of the zener diodes, and the clamping __ Circuit Design by Pautasso Luciano, Nichelino, Italy

Generate Short Delayed Pulse -  This circuit generates a short 10ms pulse 15 minutes after a “start” pushbutton switch is activated . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2005

Light-Sensitive Alarm -  The circuit detects a sudden shadow falling on a light-sensor and sounds a beeper for a short time (adjustable).  Normal lighting can be used, but the circuit will work best if a beam of light is arranged to fall on the light-sensor.  Breaking this beam will then cause the beeper to sound __ Designed by John Hewes

Light-Sensitive Fire Alarm -  This light-sensitive fire alarm circuit is extremely sensitive, low-cost and easy to assemble even by a beginner.  It uses infrared photo transistor as fire sensor.  Circuit and working Circuit diagram of the light-sensitive...__ Electronics Projects for You

Monostable Flip Flops (One Shot) -  The two circuits below illustrate using the 555 timer to close a relay for a predetermined amount of time by pressing a momentary N/O push button.  The circuit on the left can be used for long time periods where the push button can be pressed and released before the end of the timing period.  For shorter periods __ Designed by Bill Bowden

Monostable makes low-cost F/V converter -  02/18/99 EDN-Design Ideas - NOTE :  Page includes several designs.  Scroll to find this one.  The circuit in Figure 1 is a low-cost frequency-to-voltage NOTE :  F/V]converter.  Using a monostable NOTE :  one-shot]multivibrator, the circuit accepts an open-collector square wave that varies in frequency from 0 to 10 kHz.  The one-shot produces __ Circuit Design by Mark Brinegar, Dart Controls Inc, Zionsville, IN

Monostable Mode Operation One Shot Pulse -  Circuit Ideas for Designers App Note__ Advanced Linear Devices, Inc

Monostable Multivibrator -  The schematic for a monostable multivibrator is shown in figure 3-11.  Like the astable multivibrator, one transistor conducts and the other cuts off when the circuit is energized.  __ Integrated Publishing, Inc.

NE555 Basic Monostable -  Use of the ubiquitous 555 timer in monostable mode.   __ Designed by Andy Collison

Novel Floating Current Source -  05/01/03  EDN-Design Ideas - One-shot provide as frequency discrimination - Figure 1 shows a polarization circuit applicable to ISFET (ion-sensitive field-effect-transistor] sensors.  ISFETs are solid-state chemical sensors that measure the pH value of a solution i __ Circuit Design by S Casans, AE Navarro, and D Ramirez, University of Valencia, Burjassot, Spain

One Shot (D-Flip/Flop) Circuit -  Yes you can use cheap D flip/flop logic circuits as nice one-shot pulse generators.  This schematic shows how the popular CD4013 and the CD74HC74 can be used to generate pulses ranging from nanoseconds to seconds. . . Circuit by Dave Johnson P.E.-June, 2000

Oneshot & Latch Pushbutton -  This circuit uses a single IC to convert a noisy pushbutton switch signal into a clean pulse or a sustained push on-push off signal.  It can operate from 3v to 18v . . . Hobby Circuit designed by Dave Johnson P.E.-March, 2002

One-shot is programmable -  12/21/01  EDN-Design Ideas - Figure 1 shows how to digitally program the on-time of a one-shot multivibrator circuit.  More and more, the Internet is playing a role in control operations in industrial and R&D endeavors and in household appliances.  One-shot circ __ Circuit Design by J Jayapandian, IGCAR, Tamil Nadu, India

One-Shot Provides Frequency Discrimination -  05/01/03  EDN-Design Ideas - You use a frequency discriminator to compare one signal frequency with another one.  A functional feature, retriggering, of a monostable, one-shot 74xx123 multivibrator can yield frequency discrimination.  Figure 1 shows a frequency discriminator that determines the relation of input-pulse frequency to a reference frequency __ Circuit Design by Victor Aksenenka, CSRI Elektropribor, St Petersburg, Russia

One-Shot Remembers Input-Pulse Width -  07/18/96  EDN-Design Ideas - The circuit in Figure 1a remembers the width of an input pulse at the in terminal.  After the input pulse returns to zero, a trigger input causes an output pulse to occur at the out terminal.  This output pulse is proportional to the width of the input pulse.  R2 and R3 set this pulse-width ratio.  For the values shown, the output pulse is half __ Circuit Design by Ray Kauffman, Electronic Devices Inc, Chesapeake, VA

One-Shot Timer for Energy Saving Lighting -  Note that the circuit is coupled directly to AC mains using the existing system in the building.  A switch is used to start the timing and light one or more bulbs.  The relay is powered from 12V and its contacts must outstand up to 1kW at 220V.   __ Designed by Popescu Marian

Pushbutton Oneshot & Latch -  This circuit uses a single IC to convert a noisy pushbutton switch signal into a clean pulse or a sustained push on-push off signal.  It can operate from 3v to 18v. . . Circuit by David Johnson P.E.-March, 2002

Quad Monostable Mode Operation One Shot Pulse -  Circuit Ideas for Designers App Note__ Advanced Linear Devices, Inc

Repeating One-Shot Yields Clean, Stable Pulse -  12/08/94 EDN-Design Ideas - Now and then, you need a repeating one-shot, such as a multi-shot.  For example, when an input logic signal or alarm condition occurs, you may need an immediate pulse to provoke a sequence that eventually resets the condition.  But, if the resetting fails, you need to __ Circuit Design by Phil Harvey, Technology Integration, Bedford, MA

Simple Circuit Electronic 'Lock' -  There are six (or more) push switches.  To 'unlock' you must press all the correct ones at the same time, but not press any of the cancel switches.  Pressing just one cancel switch will prevent the circuit unlocking.  When the circuit unlocks it actually just turns on an LED for about one second, but it is intended to be adapted to turn on a relay which could be used to switch on another circuit.  Most relays cost about £2 to £3 extra __ Designed by John Hewes

Slow Op Amp makes fast multivibrator -  01/01/98 EDN-Design Ideas - A classic one-shot multivibrator using an op amp (Figure 1a) needs a relatively long-duration triggering pulse, even though the circuit is in theory a slope-triggered configuration.  This limitation can be a problem when you want to use a "spare" op amp from a dual or quad package (LM324, LM358, LM6482, or LT1013, for example) triggered __ Circuit Design by Lukasz Sliwczynski, University of Mining and Metallurgy, Krakow, Poland

Turn D-Flip/Flop into a One Shot Circuit -  Yes you can use cheap D flip/flop logic circuits as nice one-shot pulse generators.  This schematic shows how the popular CD4013 and the CD74HC74 can be used to generate pulses ranging from nanoseconds to seconds . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000


One Shot / Monostable Circuits:  #'s - F       G - Z

 


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