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 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 Design by
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 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 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 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 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 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 |