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1000 Threads found on One Shot Multivibrator
I need a one shot monostable multivibrator package that gives a ON pulse of duration 0.6 to 1.2 microsec on applying trigger signal.
There appears to be a wide variation in available pulse-stretching duration in the 74HCT123 one-shot (monostable multivibrator) devices. The one I have on hand (Texas Instrument) will provide no more than 120mS, and I need up to 2 seconds. Some datasheets are ambiguous and some claim microseconds through "infinity". (...)
Hi all I know this component might be considered as digital but "embedded systems and real time OS" didn't feel like the right category to create the thread in either... sry if I placed it incorrectly.. Why I need a multivibrator: I'm working on a project where two sensors is going to trigger another circuit or microcontroller and the output p
the 555 circuit should work . Use bias components to produce a pulse on 555 power up. Us second 555 to reset pin of first to disable it. Barrybear
are there any books dealing with caparator as one shot circuits.
hi guys, i would like to know how do i able to create a one shot pulse of 12ms from microcon. atmega169 from any gpio each time i press a button which i connect to another gpio. thanks guys
Can anybody take a look at the circuit in the image? why is the output from AND gate rahter than Q of retriggerable one-shot directly?
Does anyone can upload some documents about a one shot circuit for DC DC converter design. one shot circuit is used to generate several micro second period for dcdc covverter applcation. Thanks.
Hello, I am currently working on a small project that will use a dual one-shot IC (something like HCF4548B) and will be powered off a 12V automobile battery. I am not sure how I should power/connect the IC. Let me explain a little more about the project: The HCF4548B has an absolute maximum rating for Vdd of up to 20V (I think), and it's trigger
Hi, I need to implement a special Monostable "one shot". When the circuit is trigged, the circuit needs to switch to high instable state for a certain time-"high time" and then switch to low voltage. If there was another trigger while the circuit was at a high instable state the then the "high time" should start from the beginning. for e
Hi, I need to implement a special Monostable "one shot". When the circuit is trigged, the circuit needs to switch to high instable state for a certain time-"high time" and then switch to low voltage. If there was another trigger while the circuit was at a high instable state the then the "high time" should start from the beginning. for ex
It seems that two pics had less relations. In 1st pic., one-shot block used in constant on-time arichtecture buck controller. In 2nd pic.,the function of one-shot module is to rectify the duty cycle to a small value as you mentioned before. For <50% duty cycle, one-shot (...)
Mind you, a one shot with a 1pF timing capacitor which feeds a 741 is asking for trouble. I think a somewhat faster op-amp might be a good idea. Brian.
First of all, you're going to need more than just a one-shot; you will also need some kind of latch to disable the one-shot after it's been triggered once. Also keep in mind that the HC4538 is, by definition, a RETRIGGERABLE one-shot. This means that if a subsequent trigger occurs before (...)
Hello, is there any way I can configure CD40103BE (presettable down counter) to stop after Carry Out? like one shot counter. After a trigger it needs to count the Jam, when it gets to 0 it gives me Carry Out signal and STOPS! I dont want it to count again. any help? thank you.
Hi folks, I am designing a motor control application. I wish to implement the fault protection in hardware as the micro controller may take too long to respond. This is my issue currently: 1st: I thought about using a 555 timer as a one shot triggered, but most circuits will timeout after a while. I wish to either have separate set/reset
How do i test a counters up/down or 4-Bit Binary Counter? to see if its faulty or working? Do i test the Reset pins? to see if its a high or low state? How do i test a Level Shifter? to see if its faulty or working? How do i test a Register? to see if its faulty or working? How do i test the Enable inputs and latch inputs? to see i
Relay debounce is done either with additional circuitry, or with a software delay. The additional circuitry can be a SR flip flop (also called a SR multivibrator) if you have a double throw relay, or a simple RC circiut for a single throw relay. The SR flip flop would simply connect with the NC relay contact on one input of the flip (...)
Real grid has quite a bit of noise that will prematurely trip a zero crossing solely based on level without any filtering. With noise filtering you need to take into account delay due to filter, which usually means a one shot multivibrator, slightly shortened in AC period to generator the zero crossing trigger at the next zero crossing point.
Hi Guys, I tried my hands in simulating a simple one shot monostable multivbator in Spectre. I am getting the wrong output for some reason. Is it because the trigger signal is too short? I put it at 1us pulse width. Even when I changed it to 10us, I still don't get the correct output. I tried to vary the RC element which should determine the Tau
Hi all, Im Looking for a ultra-speed Monostable multivibrator which can produce 2-5 Ns output Pulse width(Tw).. Can Any one suggest me any such part which can produce this ... Thanks Rah
Hi I need a Frequency-Voltage schematic (without the LM2907) Where can I find one Best Regards Pendragon
Converting monitor to xy display for spectrum analyzer is dificult. You will need at least 500kHz bandwidth. If you are satisfied with 100kHz bandwidth you can use so called raster technique. First you should rotate deflection coils for 90 degree. Change their role as in the first reply. Time base signal is now connected to horizontal deflection co
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Monostable multivibrator has one state calle dquasi stable state, in which it is one shot transfer input, and so called stable
Monostable will generate only one pulse; astable will generate a square wave. In other words, monostable=one-shot, astable=free-running. And 555 (indicated by Rectifier) is a very good example of both modes. Regards, IanP
you can't. you need to use two 555's... or one 556. Set the first one for 10 seconds, and connect it's output to the second 555's trigger via an edge trigger (a small cap with two pull-up resistors on either side).
To change all vias of a particular size, you use "Find Similar Objects". From the PCB editor, locate one of the vias you want to change. Put the cursor on it and press the right mouse button. A menu pops up - select the the top item which is "Find Similar Objects". A dialog panel will pop up, allowing you to choose which characteristics you w
If you want your counter to advance by one state each time you push the button, all you need is a switch debouncer (Google). Counters don't need a complete clock cycle. They only need a transition in the proper direction (e.g., from 0 to 1).
Hi Compprod, You can choose from two circuits. If you are building it for yourself you can use the second circuit, it has the advantage that you don't need a PCB. If you are building it for somebody else, you gonna have to go for the circuit with the timer because it will bring you more money. And don't forget to put at least two leds in
Hi, Did not you spell it one-shot rather than one-short? ? If it is one-shot (I do guess it is), than see these links: If you are sure it is one-short, I sorry then, maybe others will be of help here. rgds unkarc
Please describe the function you need more completely. As you can see from the suggestions there are many kinds of "delays". I'll guess. Low precision solution: Since you mentioned a RC element. I think you want a edge triggered delay. Use a one-shot timer (aka Monostable multivibrator, i.g. MM74HC4538). 3us (...)
There is one important problem: your shot signal must be periodically repeated to be indicated as a spectrum on your analyzer. Only then the above procedure can work. If you have only one shot run, the best way would be to use an oscilloscope with memory to record it. From the real pulse shape you can calculate the (...)
Please explain in more detail your problem. Before doing this please read "Because these monostable multivibrators are half analog and half digital, they inherently are more sensitive to noise on the analog portion (timing leads) than standard digital circuits. Th
Didn't understand the question? What do you want exactly? During the time when the gate signal is above a specific value, a fixed width pulse should be generated on the next zero crossing of the 2nd signal This can be done by a timer IC.. IC555
You could select the input trigger to be riseing or falling edge and when use in the one-shot mode would ignore any other triggers untill yours retunes to 0 or 1 (you select) and starts again. Could not find the link so just guessin. What Chip are you using? i am using LM555 with monostable configuration. so, an
Hi, I would like to use a Power-Out Alert device (Power-OutAlert ) to detect a power outage and actuate/trigger a relay. Basically, I need to convert the continuous signal of the power-out sensor into one single-shot or single pulse signal. The power-out alert device has
... float-switch makes a connection when bilge water gets high enough and light and siren go off... Different lights for different compartments, one siren run off a bus ... Does that mean that there is a separate switch for each light? Is/are the switch/es just a pair of contacts which close when the water i
Look NOR Gate Monostable................ The one-shot Monostable multivibrator ok i got it but i cont understand this point As both plates of the capacitor are now at logic level "0",
Need to conect pin 4 to Vcc, If the RESET terminal of a 555 or 556 timer is not going to be used, it is normal practice to connect this input to the supply voltage. If the RESET terminal is left unconnected the operation of the timer will not be affected, however, the RESET of CMOS version of these timers should not be left unconnected
You are correct in the first statement: the 10k resistor is just a pulldown which keeps the TRIG pin held low until it's triggered by the pushbutton, and which quickly turns the output off when the button is released. The 1Meg resistor sets the time delay before turn-on. I'm not so sure if this is the right circuit for you, however. The way you wo
can i use monostable multivibrator in the place of one shot... The terms aren't but synonyms.
Hi all, Can any one tell me the working of one shot timer in controllers.Also the difference in normal and one shot timers.
555 timers are commonly used as a one-shot (monostable multivibrator) but for your requirement of a positive edge-triggered circuit with a long duration trigger, the
Here is a company that builds what you are looking for. Here is another one. I would suggest sending an email to these people and checking their eval software etc.
It lools like a simple counter circuit will work. Use a simple ripple counter like in the 4000 family and tap off the output you want. Use a 555 timer oscillator to reset the counter. feed the pulses to be kept below 4000/sec to the counter. Have the 555 frequency such that the counter overflows and produces a carry when the prf exceeds your li
Yes, some times it is better not to ask your colleagues because they can misunderstand that you're a beginner. First of all: what do you call deep sub-micron? 0.25um or smaller? The first clue is to have adecuate models. Are you working for industry or college? The question arises because in industry you are not allowed to make big errors (on
The descriptor is just an array of bytes. It can be a constant array if you do not have the ram to spare. The Device Descriptor is simply a byte array of size 18. The Configuration Descriptor is 9 bytes, but enumeration requires that the Config/Interface/Endpoint Descriptors be sent at one shot. Hence your array should be of the appropriate length
You can use a transistor in series with the motor and put a RC circuit on the base. Or you can use a cmos 555 timer in the one shot (monostable) mode and an AND gate which will drive the transistor base.
In general: The lockout prevents turning-on of both transistors by locking out the drive to one while the other is still on. The one-shot simply gives a short pulse every time the waveform passes through zero. This is used to synchronize the drive to the devices in a multiphase system.