1000 Threads found on edaboard.com: 555 Delay Circuits
Hi, guys, I would like to study time delay circuit, could you give me some useful materials,? thanks!
In my opinion, using inverter and capacitor or current source and capacitor could produce a time delay. are there other methods?
Analog Circuit Design :: 08-11-2007 07:18 :: liuyonggen_1 :: Replies: 4 :: Views: 1039
I read lots of patents about clock recovery from Manchester codes. They all use delay techniques to delay the Manchester codes by 1/3, or 1/4, or 3/4 bit period. However, they did not mention what is this delay circuits and how to realize them. Could anyone tell me what circuit or element to implement this (...)
Analog Circuit Design :: 11-11-2009 16:08 :: Jing :: Replies: 0 :: Views: 1321
Check for "555-circuits" or 555 timer/555 monostabil multivibrators & even general: triggered timer circuits...., we have such at EdaBoard too...
Simplest solution is for you: per switch loaded serial RC element of 1uF & ca2.7MOhm to basis of a transistor, their Collector/Emitter has your relay...
Electronic Elementary Questions :: 01-17-2010 06:53 :: karesz :: Replies: 3 :: Views: 2723
Hi, I'm somewhat inexperienced in electronics (I've soldered wires, cables, made a few circuits with 555 timers etc). I have an old vintage computer that I've just rewired to with with S-video.
The problem I have is that the luminance and chromaticity signals are slightly out of phase which results in a little ghosting on my monitor.
Analog Circuit Design :: 12-01-2011 02:48 :: SparkyNZ :: Replies: 18 :: Views: 1241
Maybe you need to have a timer and delay using a LM555+CD4017 70183 johnson counter for your 6sec delay ?
Analog Circuit Design :: 03-04-2012 06:58 :: vimalkhanna :: Replies: 3 :: Views: 1405
Single capacitors quite often don't work well as delay circuits ..
Maybe you should consider the very popular 555 timer .. something similar to this:
Hobby Circuits and Small Projects Problems :: 08-13-2006 00:55 :: IanP :: Replies: 8 :: Views: 3325
I think you have a monostable circuit of IC555. If you want to understand the working of that IC go through this link
Hobby Circuits and Small Projects Problems :: 12-02-2007 06:22 :: yogi :: Replies: 1 :: Views: 2169
New to the forum, found it through google. I'm not very knowledgeable in electronics and would love some help. I did a quick search here but no luck.
What I have is an air-bag rear suspension system in a light truck. There is an on-board air compressor and tank. There are solenoids that when triggered, add or release air from the bags
Electronic Elementary Questions :: 09-13-2009 08:54 :: truck nut :: Replies: 4 :: Views: 1190
Is there some way I can add 1/60sec lag to a signal without messing up all the frequencies in the signal?
I was thinking about a delay line but I have never used one. Can someone tell me where I would get one and which one I should get?
Electronic Elementary Questions :: 08-17-2010 22:46 :: qubits1 :: Replies: 6 :: Views: 992
Could someone please explain this circuit?
Why is there a 4.7M in parallel to 100nF?
Also, how does the frequency diminish?
Why are pins 7 and 6 shorted?
Electronic Elementary Questions :: 11-07-2010 19:44 :: bikker90 :: Replies: 0 :: Views: 1159
If you simply want to drive 4017, use 555 timer as clock generator
KNIGHT RIDER Circuit
Or if you want to play with PIC and use it as a clock generator; Use your programing language to configure a pin as an output, then repeatedly out 1 and 0 with some delay (say 500ms).
Microcontrollers :: 02-17-2011 12:25 :: DineshSL :: Replies: 4 :: Views: 2811
I would like to add a delay to a signal like
wait for 2.118ns;
But, wait statements are not synthesizable.
I heard that i can add Flipflops or RAMs to make delay synthesizable. But how to add particular delay value like 2.118ns to Flipflop or RAM.
PLD, SPLD, GAL, CPLD, FPGA Design :: 04-30-2011 14:02 :: deepthi.reddy.912 :: Replies: 3 :: Views: 1844
Hey,Man who can help me to design a circuit which will activate a relay after 45 minutes during 10 s,I don`t want to use PIC or an other microcontroller type.
I would like to use logic circuits like cd4060,monostable like ne 555 and so on--
Any suggestion is welcome!!
Electronic Elementary Questions :: 08-18-2011 13:04 :: john120 :: Replies: 5 :: Views: 929
Trying to get this working, building from of this schematic.
Concern: - I'm not exactly sure how the polarity works on their NO push button's I'm using. Its har
Electronic Elementary Questions :: 05-28-2012 23:53 :: Gr3x :: Replies: 2 :: Views: 634
These sites offer a myriad of possibilities:
555 Timer circuits
555 Timer Weekend Projects
Electronic Elementary Questions :: 07-22-2013 02:27 :: bigdogguru :: Replies: 7 :: Views: 454
For a first guess, have a look at 555 timer application notes. If you want zero current consumption in off-state, a different approach might be required, e.g. using CMOS logic ICs or transistors.
Hobby Circuits and Small Projects Problems :: 07-26-2013 05:42 :: FvM :: Replies: 34 :: Views: 991
use 555 as a astable multivibrator use a buzzer of 12vdc
- - - Updated - - -
use this ckt
Analog Circuit Design :: 09-29-2013 05:28 :: pradeep.g.belchada :: Replies: 10 :: Views: 543
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.
Electronic Elementary Questions :: 07-03-2005 04:41 :: IanP :: Replies: 8 :: Views: 6442
I am working on designing a PLL system where the VCO output is sent through a sensor and is then brought back into the PFD. When the VCO output goes through the sensor a phase delay related to the resonance of the sensor is created. I was wondering about incorporating a phase delay in the feedback loop(not the sensor loop) in order to get the P
Analog Circuit Design :: 07-24-2007 17:33 :: rsobin :: Replies: 0 :: Views: 537
I am always forgetting to turn off and end up running the batteries down on my 2 AA powered bulls-eye viewer for my telescope. I wondered if there was an easy way to solder in something that would shut it down in 10-30 minutes or so. I don't have much room in the battery case, but it does have about double the size of 2 batteries extra. Any sugge
Hobby Circuits and Small Projects Problems :: 08-28-2009 10:10 :: danickstr :: Replies: 2 :: Views: 1232
Hmm, well you can IC555 to generate ON/OFF signal when sound is generated. The preamplifier output can be given to trigger pin of IC555. Trigger levels can be adjusted with respective register. for more 555 based circuits its easily available.
Electronic Elementary Questions :: 01-19-2011 06:41 :: amitjagtap :: Replies: 4 :: Views: 1259
hi....i want to ask a question when i simulate the hex file in protious everything goes fine but when i burn the hex in 8051 and put 89s51 in circuit and at that moment i apply power after that for a very short interval of time all the pins of 8051 goes high and after that it start following the code written inside..a very short pulse i recive at
Microcontrollers :: 08-14-2011 11:36 :: aliraza786 :: Replies: 24 :: Views: 1007
For the battery protection circuit, i found this schematic diagram.
How do i construct this circuit...and what is Eb+ and Eb-???
appreciate the help
Electronic Elementary Questions :: 08-30-2011 01:08 :: HappyPenguin :: Replies: 1 :: Views: 1172
Hello I'm new to electronic circuits and have been trying everything to get this circuit to work. Any help would be greatly appreciated.
In this circuit I'm using:
(These are all in right place on schematic)
- 10k potentiometer
- A 470 ohm resistor
- A 1k ohm resistor
- A 560 ohm resistor
- A 47 ohm resistor in place of the 180 ohm
Electronic Elementary Questions :: 09-02-2011 21:52 :: sneitzke38 :: Replies: 89 :: Views: 3240
So you need to make a repeat timer circuit with large intervals between ON/OFF times. For this you may use analog timers, see the 555 series (better LMC555 CMOS circuit) or to use digital circuits like CD4060. Those circuits can be used as an adjustable output timer that will re-trigger at regular intervals. The output (...)
Electronic Elementary Questions :: 01-20-2012 03:49 :: mister_rf :: Replies: 7 :: Views: 1188
Hey all, I am an extreme beginner to electronics. Anyways, I came across the following schematic and I have a few questions regarding it:
First off, C=Capacitor and R=Resistor (sorry for the crappy diagram :( )
Anyways, this is a circuit which creates a flashing LED.
My questions are this:
1) Why isn't
Electronic Elementary Questions :: 02-09-2012 01:49 :: Ulnarian :: Replies: 5 :: Views: 714
Try to use the '555 series' circuits.
LM555 Timer circuits
555 and 556 Timer circuits
Electronic Elementary Questions :: 02-12-2012 15:55 :: mister_rf :: Replies: 11 :: Views: 695
these two componets are also used to design filters.
capacitors are also used for dc battery stability (to eliminatea/c flutuations).
caps are used for timing (by charging and discharging through resistors) in 555 timer circuits.
Electronic Elementary Questions :: 05-02-2012 01:09 :: shahbaz.ele :: Replies: 4 :: Views: 2265
The monoflop in post #2 seems to be dual-edge triggered. Surely different from a 555.
Apart from this point, it's not obvious how the design should work for basic manchester encoded data. Can you refer to a waveform diagram?
Analog IC Design and Layout :: 07-13-2012 06:46 :: FvM :: Replies: 23 :: Views: 1764
simple method with darlington transistor
LDR with op-amp:
Microcontrollers :: 04-25-2013 07:54 :: jpsganesh :: Replies: 6 :: Views: 1118
If all the PIC does is time 2 minute intervals you are wasting it's capabilities. You can do the same thing with a 555 timer.
As pointed out, the type of relay depends very much on the current it has to switch and the kind of load you are turning on and off.
Professional Hardware and Electronics Design :: 04-15-2014 15:52 :: betwixt :: Replies: 7 :: Views: 421
for this you have to connect it with the ldr tha a delay circuit and then a 555 timer it will gives you more accurate idea how the circuit hsould work
Electronic Elementary Questions :: 02-03-2006 07:45 :: vicky :: Replies: 5 :: Views: 2524
You don't have to worry about triggering a 555 from a CMOS-level logic source as long as you use a CMOS 555 variant, which in fact is a must if you want such long delays: 1-hour.
With standard 250 nA BIAS input currents you won't be able to acquire 1 hour delay without special (...)
Hobby Circuits and Small Projects Problems :: 10-07-2003 01:01 :: silvio :: Replies: 3 :: Views: 1684
I need a timer that after applied 127VAC/60Hz it counts let's say 20 seconds and then turn on a relay and stays on, using a transformerless power supply and a LM555 timer.
Hobby Circuits and Small Projects Problems :: 05-06-2005 19:30 :: fjpompeo :: Replies: 5 :: Views: 9551
All of are familiar with Propogation delay in digital circuits. But what is contamination delay and how does it occur? Any insights?
Does contamination delay also play a part in the total delay of the circuit?
ASIC Design Methodologies and Tools (Digital) :: 11-13-2005 12:54 :: vlsi_whiz :: Replies: 1 :: Views: 6157
this file contain large No of standard circuits for 555 chip
it is aprogram "simulator"
Analog Circuit Design :: 02-15-2006 07:21 :: ceaser :: Replies: 3 :: Views: 691
Low-jitter clock multiplication: a comparison between PLLs and DLLs
van de Beek, R.C.H. Klumperink, E.A.M. Vaucher, C.S. Nauta, B.
Univ. of Twente, Enchede, Netherlands
This paper appears in: circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on [see also circuits and Systems II: Express Briefs, IEEE Tr
Analog Circuit Design :: 11-19-2006 13:34 :: zakrotta :: Replies: 5 :: Views: 2741
I would like to know how to build 1 second delay using IC LM555, I mean the schematic which 555 used as monostable multivibrator. Any help is greatly appreciated.
Analog Circuit Design :: 11-29-2006 05:25 :: reflectarray :: Replies: 0 :: Views: 932
i want create a delay of 5hrs using only harware no sofware/programming can u tell me the harware circuit of this.
(for example using a 555 in Astable we can create a 1 sec delay)
so i need which harware i have to use in such a way that i can get a delay for 5hrs..
thanking you in advance.
Professional Hardware and Electronics Design :: 02-07-2007 03:13 :: prasannabalaji :: Replies: 1 :: Views: 1129
you can find uA741 and 555 in every basic circuit book, these are study examples for analog designer
is the home page of the designer's of the 555 (Hans Camenzid)
But it is not clear for me, maybe you are looking for application. This topic is for IC design, not for application design.
Analog IC Design and Layout :: 09-19-2007 09:43 :: drabos :: Replies: 1 :: Views: 543
who makes a cheap video delay chips or circuits?
I'm looking for a cheap circuit or video delay chips that can take the video signals either VGA,S-video,composite,component,RGB and delay it in milliseconds but how?
what are these types of chips and circuits called please?
I have a audio (...)
Electronic Elementary Questions :: 03-28-2008 03:57 :: walters :: Replies: 7 :: Views: 1802
You may want to describe the intended circuit operation more clearly. To my opinion it's hard to understand either from the circuits or your description.
Generally, introducing a delay in the said range involves capacitors of about 1000 uF. It can be implemented more easily with active parts, either timer circuits with (...)
Hobby Circuits and Small Projects Problems :: 04-25-2009 07:32 :: FvM :: Replies: 6 :: Views: 3121
I think the simplest way is a double 555 (556?) to use.
and these one
"555 tutorials": maybe their helps.
the first one as 1-3msec monostabil, triggered/started with the 10Hz signal
Analog Circuit Design :: 04-18-2010 07:04 :: karesz :: Replies: 2 :: Views: 771
the max voltage of 555 is 15 volts.
In truck the voltage can be more than 15 volts(24 volts or 26 whith engines running)
Analog Circuit Design :: 11-06-2010 17:58 :: pozzari :: Replies: 4 :: Views: 832
i am building a simple DC-AC inverter for my school project, i am stucked at how to use a 555 timer to generate control signals to control two MOSFET, which will output ON/OFF/OFF to one MOSFET and OFF/OFF/ON to the other MOSFET, is there a simple logic circuit to do the job? ideas?
Hobby Circuits and Small Projects Problems :: 08-08-2011 23:28 :: ful24 :: Replies: 18 :: Views: 2072
I wouldn't use 555, instead consider (also 8-pin-DIP) PICAXE-08.
delay can be set by programming this IC (command WAIT 60 => 60s delay), there is no problem in triggering it on power-on, and input can read transitions from 0-to-1 and from 1-to-0 ..
Cost - $1.
And the most important thing is that there is no dependence on any external (...)
Analog Circuit Design :: 11-09-2011 20:01 :: IanP :: Replies: 4 :: Views: 882
From what you describe you need two stages of timers.
1: delay after initial sound begins (or ends?)
2: 'on' time for activating equipment
It may be easiest to use a second 555 IC. There's the 556 which contains two 555 in one package.
Otherwise if you are willing to experiment, you can use a simple RC combination and find the (...)
Hobby Circuits and Small Projects Problems :: 01-31-2012 18:12 :: BradtheRad :: Replies: 4 :: Views: 2132
I need to build a 12 volt dc delay on timer.on application of supply voltage,the timing cycle should start and after a 5 second delay the output should activate a 6 volt or 12 volt relay.I would really appreciate it if somebody could help with a circuit diagram preferably using the 555 ic as a timer.
Nishon Premlall (...)
Hobby Circuits and Small Projects Problems :: 10-04-2012 13:33 :: Nishon :: Replies: 9 :: Views: 1982
I am nt very familiar with electronics design. Just have some basic knowledge. For one of our projects to heat an alloy with capacitive discharge current being controlled by SCRs, i need to make a 3 stage time delay trigger circuit using 555 ics(or any other suggestions?). Could anyone guide me doing that. There are 3 numbers of capacitors b
Analog Circuit Design :: 07-19-2013 05:26 :: ravi2024 :: Replies: 2 :: Views: 698
Sorry for being so unclear.
The fan is mains (220V) operated, and the toggle switch is part of the mains power, switching the lights on-off.
The delay off electronics is 12 V operated, and gets its power from the permanent phase and zero lines.
The coupling between the low V and the high V circuits is made with relays.
The referred to
Hobby Circuits and Small Projects Problems :: 08-05-2013 01:09 :: Yossef Gofer :: Replies: 2 :: Views: 495